Tootfinder

SKYSURF VIII -- Modeling SKYSURF Completeness Data for Comparison to the Hubble Space Telescope Exposure Time Calculator
Zachary Goisman (Arizona State University School of Earth and Space Exploration, Arizona State University School of Electrical and Computer Engineering), Timothy Carleton (Arizona State University School of Earth and Space Exploration), Seth H. Cohen (Arizona State University School of Earth and Space Exploration), Delondrae Carter (Arizona State University School of…

SKYSURF VIII -- Modeling SKYSURF Completeness Data for Comparison to the Hubble Space Telescope Exposure Time Calculator
Accurately assessing image source completeness is critical for interpreting measurements on telescope data. Using the Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS) data from the Hubble Space Telescope ($HST$) archival project "SKYSURF", we model galaxy completeness as a function of the exposure time and background of an image. This is accomplished by adding simulated objects with varying magnitudes and sizes into these images, and determining the detection rate for each set o…

Unraveling the Secrets of the lower Solar Atmosphere: One year of Operation of the Solar Ultraviolet Imaging Telescope (SUIT) on board Aditya-L1
Rahul Gopalakrishnan, Soumya Roy, Deepak Kathait, Janmejoy Sarkar, Nived V. N., Durgesh Tripathi, A. N. Ramaprakash, Sami K. Solanki, Sreejith Padinhatteeri, Mahesh Burse, Rushikesh Deogaonkar, Sakya Sinha, Adithya H. N., K. Sankarasubramanian, Dipankar Banerjee, Dibyendu Nandy, Srikant Motamarri, Amit Purohit, Rethika T, Sreenath K R, Priyank…

Unraveling the Secrets of the lower Solar Atmosphere: One year of Operation of the Solar Ultraviolet Imaging Telescope (SUIT) on board Aditya-L1
The Solar Ultraviolet Imaging Telescope (SUIT) is an instrument onboard Aditya--L1, the first solar space observatory of the Indian Space Research Organization (ISRO), India, launched on September 2, 2023. SUIT is designed to image the Sun in the 200--400 nm wavelength band in eight narrowband and three broadband filters. SUIT's science goals start with observing the solar atmosphere and large-scale continuum variations, the physics of solar flares in the NUV region, and many more. The paper el…

Precision spectral measurements of Chromium and Titanium from 10 to 250 GeV$/n$ and sub-Iron to Iron ratio with the Calorimetric Electron Telescope on the ISS
O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, P. Betti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, G. A. de Nolfo, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, M. H. Israel, K. Kasahara, J. Kat…

Precision spectral measurements of Chromium and Titanium from 10 to 250 GeV$/n$ and sub-Iron to Iron ratio with the Calorimetric Electron Telescope on the ISS
The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray (CR) iron and sub-iron events over a wide energy interval. In this paper we report an update of our previous measurement of the iron flux and we present - for the first time - a high statistics measurement of the spectra of two sub-iron elements Cr and Ti in the energy interval from 10 to 250 GeV/n. The analyses are based on 8 years of data. Differently…

The Atacama Cosmology Telescope: High-redshift measurement of structure growth from the cross-correlation of Quaia quasars and CMB lensing from ACT DR6 and $\textit{Planck}$ PR4
Carmen Embil Villagra, Gerrit Farren, Giulio Fabbian, Boris Bolliet, Irene Abril-Cabezas, David Alonso, Anthony Challinor, Jo Dunkley, Joshua Kim, Niall MacCrann, Fiona McCarthy, Kavilan Moodley, Frank J. Qu, Blake Sherwin, Cristobal Sifon, Alexander van Engelen, Edward J. Wollack

The Atacama Cosmology Telescope: High-redshift measurement of structure growth from the cross-correlation of Quaia quasars and CMB lensing from ACT DR6 and $\textit{Planck}$ PR4
We measure the amplitude of matter fluctuations over a wide range of redshifts by combining CMB lensing observations from ACT DR6 and $\textit{Planck}$ PR4 with the overdensity of quasars from Quaia, a $\textit{Gaia}$ and $\textit{unWISE}$ quasar catalog. Our analysis includes the CMB lensing power spectrum from ACT DR6, the auto-correlation of two Quaia quasar samples centered at $z \simeq 1.0$ and $z \simeq 2.1$, and their cross-correlations with CMB lensing from both ACT DR6 and $\textit{Pla…

Nature or Nurture: LMC-like Dust in the Solar Metallicity Galaxy M31
Geoffrey C. Clayton, Petia Yanchulova Merica-Jones, Karl D. Gordon, Marjorie Decleir, Claire E. Murray, Ralph Bohlin, Luciana Bianchi, Philip Massey, Michael J. Wolff
https://arxiv.org/abs/2507.08612

Nature or Nurture: LMC-like Dust in the Solar Metallicity Galaxy M31
Using the {\it Hubble Space Telescope}/Space Telescope Imaging Spectrograph, ultraviolet (UV) extinction curves have been measured in M31 along thirteen new sightlines, increasing the M31 sample to seventeen. This sample covers a wide area of M31 having galactocentric distances of 5 to 16 kpc, enabling the analysis of UV extinction curve variations over a large region of an external galaxy similar to the Milky Way with global galactic characteristics such as metallicity for the first time. No c…

Carbon-rich Dust Injected into the #InterstellarMedium by Galactic WC Binaries Survives for Hundreds of Years: https://iopscience.iop.org/article/10.3847/1538-4357/addf30 -> Embry‑Riddle Professor, Undergrads Unlock Secrets of Cosmic Dust With the Webb Telescope: https://news.erau.edu/headlines/embry-riddle-professor-undergrads-unlock-secrets-of-cosmic-dust-with-the-webb-telescope

Pre-perihelion radio observations of comet 12P/Pons-Brooks with Tianma radio telescope
Juncen Li, Xian Shi, Jianchun Shi, Yuehua Ma, Bin Yang, Jian-Yang Li, Zexi Xing, Man-To Hui, Zhen Wang, Ruining Zhao
https://arxiv.org/abs/2508.06936

Pre-perihelion radio observations of comet 12P/Pons-Brooks with Tianma radio telescope
{The multiple outburst events of comet 12P/Pons-Brooks during its 2024 apparition offer a unique window into highly-active volatile releasing processes not observable during quiescent periods. We performed radio observations of comet 12P/Pons-Brooks with the Tianma-65m radio telescope, targeting the OH and NH$_3$ inversion lines at 18-cm and 1.3-cm, respectively. By monitoring 12P at different heliocentric distances on its inbound journey, we aim to provide insights into the comet's volatile co…

Einstein Telescope: Ferromagnetic Shielding for Magnetic Noise Mitigation
Federico Armato, Barbara Garaventa, Andrea Chincarini
https://arxiv.org/abs/2508.06631 https://

Einstein Telescope: Ferromagnetic Shielding for Magnetic Noise Mitigation
The Einstein Telescope is the next-generation gravitational wave interferometer which, compared to current detectors, will enable the observation of gravitational signals at lower frequencies with a sensitivity improved by approximately two orders of magnitude. Achieving such exceptional sensitivity requires minimizing all sources of noise. In the low-frequency regime, magnetic noise is one of the dominant. This article examines the effectiveness and limitations of a passive mitigation techniqu…

Today is a day for getting rid of things. Just gave away my old 8" Dobsonian telescope to the local astronomy club. Junk haulers next. Best feeling.

Für 400 Millionen Euro: Spanien will Thirty Meter Telescope nach La Palma holen
Weil die US-Regierung kein Geld geben will, steht das Thirty Meter Telescope auf Hawaii vor dem Aus. Spanien wirbt nun für einen Umzug nach La Palma – mit Geld.

Inflation in $F(R)$ gravity models revisited after ACT
Sergei V. Ketov, Ekaterina O. Pozdeeva, Sergey Yu. Vernov
https://arxiv.org/abs/2508.08927 https://a…

Inflation in $F(R)$ gravity models revisited after ACT
The $F(R)$ gravity models of inflation are revisited in light of the recent observations of cosmic microwave background radiation by Atacama Cosmology Telescope (ACT) and DESI Collaboration. A detailed study of the evolution equations in the Jordan frame is given and a new description of the slow-roll approximation in the $F(R)$-gravity-based models of inflation is proposed. It is found that all those models of inflation are significantly constrained by demanding a higher (than the Planck Teles…

Hoping for a #flare: During the final days of our 2 week observation campaign with #GREGORSolarTelescope on Tenerife, scientists work remote from the “GREGOR Operations Center” at #MPSGoettingen

Design and Commissioning of an LWA Swarm Station: The Long Wavelength Array -- North Arm
C. A. Taylor, J. Dowell, G. B. Taylor, K. S. Obenberger, S. I. Chastain, J. Verastegui, L. E. Cordonnier, P. Kumar, E. Sheldahl, S. Bruzewski, T. Dolch, C. A. Siders
https://arxiv.org/abs/2508.09109

Design and Commissioning of an LWA Swarm Station: The Long Wavelength Array -- North Arm
Modern radio interferometers are designed with increasingly sprawling geographical footprints, offering enhanced sensitivity and resolution. However, managing such extensive facilities presents operational challenges that can potentially impede or delay scientific progress. One solution to such obstacles is the `swarm telescope' concept which enables collaborative use of individual telescope systems, overseen by separate institutions, to create a more powerful and manageable facility. We presen…

Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
P. -J. Stas, Y. -C. Wei, M. Sirotin, Y. Q. Huan, U. Yazlar, F. Abdo Arias, E. Knyazev, G. Baranes, B. Machielse, S. Grandi, D. Riedel, J. Borregaard, H. Park, M. Lon\v{c}ar, A. Suleymanzade, M. D. Lukin
https://arxiv.org/abs/2509.09464

Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
The sensitivity of non-local optical measurements at low light intensities, such as those involved in long baseline telescope arrays, can be improved by using remote entanglement. Here, we demonstrate the use of entangled quantum memories in a quantum network of Silicon-vacancy centers in diamond nano-cavities to experimentally perform such non-local phase measurements. Specifically, we combine the generation of event-ready remote quantum entanglement, photon mode erasure that hides the "which-…

TIL #Telescope for #neovim has a planets picker

The Blue Lurker WOCS 14020: A Long-Period Post-Common-Envelope Binary in M67 Originating from a Merger in a Triple System
Emily M. Leiner, Natalie M. Gosnell, Aaron M. Geller, Meng Sun, Robert D. Mathieu, Alison Sills
https://arxiv.org/abs/2507.08122

The Blue Lurker WOCS 14020: A Long-Period Post-Common-Envelope Binary in M67 Originating from a Merger in a Triple System
We present Hubble Space Telescope far-ultraviolet (FUV) spectra of a blue-lurker$-$white-dwarf (BL-WD) binary system in the 4 Gyr open cluster M67. We fit the FUV spectrum of the WD, determining it is a C/O WD with a mass of $0.72^{+0.05}_{-0.04}$ M$_\odot$ and a cooling age of $\sim400$ Myr. This requires a WD progenitor of $\sim3$ M$_\odot$, significantly larger than the current cluster turnoff mass of 1.3 M$_\odot$. We suggest the WD progenitor star formed several hundred Myr ago via the mer…

Imaging-Spectroscopic diagnosis of the Giant Sloshing Spiral in the Virgo Cluster with the Einstein Probe Follow-up X-ray Telescope
X. Zheng, S. Jia, C. Li, Y. Chen, H. Yu, H. Feng, D. Xu, A. Liu, L. Song, C. Liu, F. Lu, S. Zhang, W. Yuan, J. Sanders, J. Wang, T. Chen, C. Cui, W. Cui, W. Feng, N. Gao, J. Guan, D. Han, D. Hou, H. Hu, M. Huang, J. Huo, C. Jin, M. Li, W. Li, Y. Liu, L. Luo, J. Ma, G. Ou, H. Pan, H. Wang, J. Wang, J. Wang, Y. Wang, J. Xu, Y. Xu, X. Yang, Y. Yang, H. Zhang,…

Imaging-Spectroscopic diagnosis of the Giant Sloshing Spiral in the Virgo Cluster with the Einstein Probe Follow-up X-ray Telescope
We performed deep X-ray observations of the Virgo cluster using the Einstein Probe Follow-up X-ray Telescope (EP-FXT) with a total exposure of 295 ks. Leveraging the large field of view (FoV) and low particle background of EP-FXT, the image reveals a giant spiral feature connecting the cold fronts in the northwest and southeast, forming a coherent structure consistent with earlier results from XMM-Newton and Suzaku. We also present two-dimensional maps of temperature, metallicity, and entropy a…

Inflationary Models with Gauss-Bonnet Coupling in Light of ACT Observations
Yigan Zhu, Qing Gao, Yungui Gong, Zhu Yi
https://arxiv.org/abs/2508.09707 https://

Inflationary Models with Gauss-Bonnet Coupling in Light of ACT Observations
Recent analyses combining Atacama Cosmology Telescope (ACT) data with other cosmological datasets report a higher scalar spectral index $n_s$, creating tension with a wide range of inflationary models. Since a Gauss-Bonnet term with a coupling function $ξ(ϕ) = 3λ/[4V(ϕ)]$ leaves $n_s$ nearly unchanged (up to a field rescaling) while reducing the tensor-to-scalar ratio $r$ by a factor $(1-λ)$, so choosing $(1-λ)$ sufficiently small effectively removes $r$ as a limiting observable, making i…

Optical Phenomena in a Non-Commutative Kalb-Ramond Black Hole Spacetime
A. A. Ara\'ujo Filho, N. Heidari, Iarley P. Lobo, Yuxuan Shi
https://arxiv.org/abs/2508.08889 https:/…

Optical Phenomena in a Non-Commutative Kalb-Ramond Black Hole Spacetime
This work investigates additional gravitational features of a newly proposed black hole spacetime within Kalb-Ramond gravity, incorporating non-commutative corrections arising from a gauge-theoretic approach recently introduced in the literature [arXiv:2507.17390]. Accordingly, null geodesics are solved numerically to trace photon paths; the photon sphere and shadow are determined. From Event Horizon Telescope (EHT) measurements of $Sgr A^{*}$, constraints on the parameters $Θ$ (which encapsul…

Quantification of The Age Dependence of Mid-Infrared Star Formation Rate Indicators
Daniela Calzetti (Univ. of Massachusetts, MA, USA), Robert C. Kennicutt (Texas A and M, TX, USA, Univ. of Arizona, AZ, USA), Angela Adamo (Univ. of Stockholm, Sweden), Karin Sandstrom (Univ. of California San Diego, CA, USA), Daniel A. Dale (Univ. of Wyoming, WY, USA), Bruce Elmegreen (Katonah, NY, USA), John S. Gallagher (Univ. of Wisconsin-Madison, WI, USA, Macalester Univ., MN, USA), Benjamin Gregg (…

Quantification of The Age Dependence of Mid-Infrared Star Formation Rate Indicators
We combine James Webb Space Telescope images of the nearby galaxy NGC 5194 in the hydrogen recombination line Pa-alpha (lambda=1.8756 micron) from the Cycle 1 program JWST-FEAST with 21 micron dust continuum images from the Cycle 2 Treasury program JWGT to quantify the difference in the calibration of mid-infrared star formation rates (SFR) between HII regions and galaxies. We use the archival HST H-alpha image to correct the Pa-alpha emission for the effects of dust attenuation. Our data confi…

Unveiling IPv6 Scanning Dynamics: A Longitudinal Study Using Large Scale Proactive and Passive IPv6 Telescopes
Hammas Bin Tanveer, Wai Sun Chan, Ricky K. P. Mok, Sebastian Kappes, Philipp Richter, Oliver Gasser, John Ronan, Arthur Berger, kc Claffy
https://arxiv.org/abs/2508.07506

Unveiling IPv6 Scanning Dynamics: A Longitudinal Study Using Large Scale Proactive and Passive IPv6 Telescopes
We introduce new tools and vantage points to develop and integrate proactive techniques to attract IPv6 scan traffic, thus enabling its analysis. By deploying the largest-ever IPv6 proactive telescope in a production ISP network, we collected over 600M packets of unsolicited traffic from 1.9k Autonomous Systems in 10 months. We characterized the sources of unsolicited traffic, evaluated the effectiveness of five major features across the network stack, and inferred scanners' sources of target a…

Machine Learning for Exoplanet Detection: A Comparative Analysis Using Kepler Data
Reihaneh Karimi, Mahdiyar Mousavi-Sadr, Mohammad H. Zhoolideh Haghighi, Fatemeh S. Tabatabaei
https://arxiv.org/abs/2508.09689

Machine Learning for Exoplanet Detection: A Comparative Analysis Using Kepler Data
The discovery of exoplanets has expanded our understanding of planetary systems and opened new avenues for astronomical research. In this study, we present a machine learning (ML) framework for exoplanet identification using a time-series photometric dataset from the Kepler Space Telescope, comprising 3,198 flux measurements across 5,074 stars. We investigate the performance of four supervised classification algorithms, namely Random Forest, k-Nearest Neighbors (KNN), Decision Tree, and Logisti…

Inside the Vera C. Rubin Observatory, whose 3.2-gigapixel camera will produce 60PB of space image data over 10 years, to be analyzed using ML and deep learning (New York Times)
https://www.nytimes.com/2025/06/20/science…

How Vera Rubin Telescope Scientists Will Deal With 60 Million Billion Bytes of Imagery
The Vera C. Rubin Observatory will make the study of stars and galaxies more like the big data-sorting exercises of contemporary genetics and particle physics.

Won’t happen in my lifetime, but if the human race survives the next decade or so some of you young whippersnappers could be seeing this.
#science #spaceScience #exoPlanets

Could a unique rectangular telescope be the key to finding Earth 2.0?
"We show that this design can, in principle, find half of all existing Earth-like planets orbiting sun-like stars within 30 light-years in less than three years."

The Schwarzschild-Couder Telescope for the Cherenkov Telescope Array Observatory
Luca Riitano (for the SCT Collaboration,CTAO Consortium), Justin Vandenbroucke (for the SCT Collaboration,CTAO Consortium), Zach Curtis-Ginsberg (for the SCT Collaboration,CTAO Consortium)
https://arxiv.org/abs/2509.05527

The Schwarzschild-Couder Telescope for the Cherenkov Telescope Array Observatory
The Cherenkov Telescope Array Observatory (CTAO) will greatly improve upon sensitivities in the field of very-high-energy gamma-ray astrophysics. The CTAO northern site (CTAO-North, La Palma, Spain) currently hosts LST-1 with the remaining three large-sized telescopes (LSTs) expected in mid-2026 and one medium-sized telescope (MST) expected in mid-2027. The CTAO southern site (CTAO-South, Paranal, Chile) expects the delivery of five small-sized telescopes (SSTs) and two MSTs in early 2026 with …

Israelis at a drive-in telescope on a hill in Sderot to have a look at the devastation their genocidal army is causing in Gaza. One visitor told the @nieuws.nos.nl correspondent that he believed almost everyone in Gaza "including women" were terrorists. https://

Vanuit heel Israël komen mensen op deze heuvel kijken naar Gaza
In de stad Sderot kijken Israëliërs met verrekijkers naar Gaza.

New VLT image shows supernova remnant 0509-67.5, the expanding remains of a star that exploded hundreds of years ago in a double detonation-- the first photographic evidence that stars can die with two blasts https://phys.org/news/2025-07-detonation-image-star-de…

Double detonation: New image shows remains of star destroyed by pair of explosions
For the first time, astronomers have obtained visual evidence that a star met its end by detonating twice. By studying the centuries-old remains of supernova SNR 0509-67.5 with the European Southern Observatory's Very Large Telescope (ESO's VLT), they have found patterns that confirm its star suffered a pair of explosive blasts.

A survey for radio pulsars and transients in the 10 pc region around Sgr A*
G. Desvignes, R. P. Eatough, Y. Men, F. Abbate, R. Karuppusamy, M. Kramer, K. Liu, L. Shao, P. Torne, R. S. Wharton
https://arxiv.org/abs/2507.08534

A survey for radio pulsars and transients in the 10 pc region around Sgr A*
Here we report on a new survey for pulsars and transients in the 10 pc region around Sgr A* using the Effelsberg radio telescope at frequencies between 4 to 8 GHz. Our calibrated full-Stokes data were searched for pulsars and transients using PulsarX, TransientX and PRESTO. Polarisation information is used in the scoring of the candidates. Our periodicity acceleration and jerk searches allowed us to maintain good sensitivity towards binary pulsars in $\gtrsim$ 10-hr orbits. In addition we perfo…

Chemical composition of planetary hosts: II. Abundances of neutron-capture elements
A. Sharma, E. Stonkut\.e, A. Drazdauskas, R. Minkevi\v{c}i\=ut\.e, \v{S}. Mikolaitis, G. Tautvai\v{s}ien\.e, U. Jonauskait\.e
https://arxiv.org/abs/2508.09979

Chemical composition of planetary hosts: II. Abundances of neutron-capture elements
We present a study of neutron-capture element abundances (Sr, Y, Zr, Ba, La, Ce, Nd, Pr, and Eu) in a large and homogeneous sample of 160 F-, G-, and K-type planet-host stars located in the northern hemisphere, including 32 stars in multi-planetary systems. The sample hosts a total of 175 high-mass planets and 47 Neptunian and super-Earth planets. High-resolution spectra were obtained with the 1.65-metre telescope at the Molėtai Astronomical Observatory using a fibre-fed spectrograph covering …

Constraining Effective Field Theories for dark matter candidates annihilating into gamma-ray lines with CTAO
Lucia Angel, Debasish Borah, Jacinto P. Neto, Farinaldo S. Queiroz, Vitor de Souza
https://arxiv.org/abs/2509.08050

Constraining Effective Field Theories for dark matter candidates annihilating into gamma-ray lines with CTAO
Gamma-ray lines constitute a smoking gun signature for annihilating dark matter particles. Imaging Atmospheric Cherenkov Telescopes and satellites have searched for such signals but null results have been reported thus far. We take advantage of the expected gamma-ray flux sensitivity of the Cherenkov Telescope Array Observatory (CTAO) toward the direction of the Galactic Centre and Dwarf Galaxies and its exquisite energy resolution to derive upper limits on fermionic and scalar dark matter anni…

An Image-Plane Approach to Gravitational Lens Modeling of Interferometric Data
Nan Zhang, Sreevani Jarugula, Justin S. Spilker, Simon Birrer, Jared Cathey, Scott C. Chapman, Veronica J. Dike, Anthony H. Gonzalez, Gilbert Holder, Kedar A. Phadke, Cassie Reuter, Joaquin D. Vieira, David Vizgan, Dazhi Zhou
https://arxiv.org/abs/2508.08393

An Image-Plane Approach to Gravitational Lens Modeling of Interferometric Data
Strong gravitational lensing acts as a cosmic telescope, enabling the study of the high-redshift universe. Astronomical interferometers, such as the Atacama Large Millimeter/submillimeter Array (ALMA), have provided high-resolution images of strongly lensed sources at millimeter and submillimeter wavelengths. To model the mass and light distributions of lensing and source galaxies from strongly lensed images, strong lens modeling for interferometric observations is conventionally performed in t…

GollumFit - An #IceCube Open-Source Framework for Binned-Likelihood Neutrino Telescope Analyses: https://arxiv.org/abs/2506.04491 -> An open-source software for neutrino telescope analyses: https://icecube.wisc.edu/news/research/2025/07/gollumfit-an-open-source-software-for-neutrino-telescope-analyses/

Flight masks of the Roman Space Telescope Coronagraph Instrument
A. J. Eldorado Riggs, Vanessa P. Bailey, Dwight Moody, Kunjithapatham Balasubramanian, Scott A. Basinger, Ruslan Belikov, Eduardo Bendek, John Debes, Brandon D. Dube, Jessica Gersh-Range, Tyler D. Groff, N. Jeremy Kasdin, Bertrand Mennesson, Brian Monacelli, Douglas M. Moore, Garreth Ruane, Jagmit Sandhu, Fang Shi, Erkin Sidick, Nicholas Siegler, Dan Sirbu, John Trauger, Carey L. Weisberg, Victor E. White, Daniel W. Wilso…

Flight masks of the Roman Space Telescope Coronagraph Instrument
Over the past two decades, thousands of confirmed exoplanets have been detected. The next major challenge is to characterize these other worlds and their stellar systems. Much information on the composition and formation of exoplanets and circumstellar debris disks can only be achieved via direct imaging. Direct imaging is challenging because of the small angular separations (< 1 arcsec) and high star-to-planet flux ratios such as ~1e9 for a Jupiter analog or ~1e10 for an Earth analog in the vi…

Pushchino multibeam pulsar search. VII. The results of the timing of 12 slow pulsars
S. A. Andrianov, V. A. Potapov, S. A. Tyul'bashev
https://arxiv.org/abs/2508.08711 https…

Pushchino multibeam pulsar search. VII. The results of the timing of 12 slow pulsars
We have performed timing of a number of known slow pulsars with poorly known coordinates and parameters of their intrinsic rotation. We used data from the archive of round-the-clock monitoring observations on the third (stationary) beam pattern of the Large Phased Array radio telescope (LPA LPI) at a frequency of 111 MHz, which has an unsatisfactory connection of the local quartz time standards to the reference scale (UTC). To compensate for the resulting errors, we applied an algorithm previou…

Discovery of a $z \sim 0.8$ Ultra Steep Spectrum Radio Halo in the MeerKAT-South Pole Telescope Survey
Isaac S. Magolego, Roger P. Deane, Kshitij Thorat, Ian Heywood, William Rasakanya, Manuel Aravena, Lindsey E. Bleem, Maria G. Campitiello, Kedar A. Phadke, Justin Spilker, Joaquin D. Vieira, Dazhi Zhou, Bradford A. Benson, Scott Chapman, Ana Posses, Tim Schrabback, Anthony Stark, David Vizgan

Discovery of a $z \sim 0.8$ Ultra Steep Spectrum Radio Halo in the MeerKAT-South Pole Telescope Survey
Radio halos are diffuse synchrotron sources that trace the turbulent intracluster medium (ICM) of galaxy clusters. However, their origin remains unknown. Two main formation models have been proposed: the hadronic model, in which relativistic electrons are continuously injected by cosmic-ray protons; and the leptonic turbulent re-acceleration model, where cluster mergers re-energise electrons in situ. A key discriminant between the two models would be the existence of ultra-steep spectrum radio …

JWST Discovery of Strong Lensing from a Galaxy Cluster at Cosmic Noon: Giant Arcs and a Highly Concentrated Core of XLSSC 122
Kyle Finner, Sangjun Cha, Zachary P. Scofield, M. James Jee, Yu-heng Lin, Hyungjin Joo, Hyosun Park, Takahiro Morishita, Andreas Faisst, Bomee Lee, Wuji Wang, Ranga-Ram Chary
https://arxiv.org/abs/2508.08356

JWST Discovery of Strong Lensing from a Galaxy Cluster at Cosmic Noon: Giant Arcs and a Highly Concentrated Core of XLSSC 122
Our observations with the James Webb Space Telescope have made the remarkable discovery of strong gravitational lensing arcs from XLSSC 122 ($z=1.98$) - setting the record for the most distant galaxy cluster that exhibits strong lensing. The discovery of giant arcs enables a strong-lensing analysis and a measurement of the concentration of the dark matter halo. We perform a strong-lensing analysis of the cluster and measure the radial projected mass density profile. Our measurements reveal an e…

New results from fast timing iLGAD sensor on Timepix4
Daan Oppenhuis (on behalf of the Timepix4 telescope group)
https://arxiv.org/abs/2509.09308 https://a…

New results from fast timing iLGAD sensor on Timepix4
With the High-Luminosity Large Hadron Collider (HL-LHC) the number of collisions per bunch crossing increases. To cope with these high rates in the pixel trackers, per-pixel time measurements are required, which implies the need for fast sensors. The inverse Low-Gain Avalanche Detector (iLGAD) is one of the fast sensor options that is being investigated. This paper will show the results of an inverse Low-Gain Avalanche Detector (iLGAD) with a pitch of 55 \textmu m, a thickness of 250~\textmu m …

Ground-Based Mid-IR Direct Imaging: The Origin of the Thermal Background on the Keck II Telescope and Correcting Instrumental Systematics
Jayke S. Nguyen, Quinn M. Konopacky, William Thompson, Natasha Popenoe, Bruce Macintosh
https://arxiv.org/abs/2509.08313

Ground-Based Mid-IR Direct Imaging: The Origin of the Thermal Background on the Keck II Telescope and Correcting Instrumental Systematics
Mid-IR wavelengths are of particular interest to exoplanet science due to the fact they can extend the searchable parameter space to planets that are older and/or colder. However, a significant source of uncertainty at mid-IR wavelengths on ground-based telescopes is the thermal background. This background comes from blackbody radiation in the atmosphere and telescope and is therefore dependent on instrument design and atmospheric conditions. When performing imaging observations, this backgroun…

Multiwavelength observations of a new black-widow millisecond pulsar PSR J1544-2555
Sergio Belmonte Diaz, Tinn Thingmeearkom, Adipol Phosrisom, Rene Breton, Marta Burgay, Colin Clark, Lars Nieder, Martin Mayer, Werner Becker, Ewann Barr, Sarah Buchner, Kaustav Kashyap Das, Vik Dhillon, Oliver Dodge, Elizabeth Ferrara, Jean-Mathias Griessmeier, Ramesh Karuppusamy, Mark Kennedy, Michael Kramer, Prajwal Padmanabh, John Paice, Antonio Rodriguez, Ben Stappers

Multiwavelength observations of a new black-widow millisecond pulsar PSR J1544-2555
We report the discovery of a new black-widow millisecond pulsar, PSR J1544-2555, associated with the Fermi-LAT source 4FGL J1544.2-2554. Optical, radio, and gamma-ray observations confirmed its nature as a compact spider binary system. Optical photometry from ULTRACAM revealed a \(\sim\)2.7-hour orbital period, guiding MeerKAT observations that detected \(\sim\)2.4-ms radio pulsations. Subsequent timing campaigns using the Murriyang Parkes Telescope, the Effelsberg 100-m Radio Telescope, and th…

A new type-1 transition in NGC 1346 revealed by (spectro)polarimetry
F. Marin, D. Hutsem\'ekers, S. Jorstad
https://arxiv.org/abs/2507.08589 https://…

A new type-1 transition in NGC 1346 revealed by (spectro)polarimetry
We present the first photo- and spectropolarimetric observations of the changing-look active galactic nucleus NGC~1346 taken with the Perkins telescope (November 2022, March 2025) and VLT/FORS2 (August and September 2024), which have revealed a new spectral transition. We find that NGC~1346 has reverted to its former (2001) type-1 spectral state after having been a type-2 active galactic nucleus from 2004 to 2022. More and more intense broad H$β$ (3720 $\pm$ 310 km.s$^{-1}$ full width at half …

Introduction to the China Space Station Telescope (CSST): #CSST is equipped with five scientific instruments [and] is expected to make significant contributions and discoveries across various astronomical fields, including cosmology, galaxy and active galactic nuclei (AGN), the Milky Way and nearby galaxies, stars, exoplanets, Solar System objects, astrometry, and transients and variable sources. This review aims to provide a comprehensive overview of the CSST instruments, observational capabilities, data products, and scientific potential."

Constraints on Axion-Like Particles from 16.5 Years of Fermi-LAT Data and Prospects for VLAST
Zhi-Qi Guo, Yue-Lin Sming Tsai, Lei Wu, Zi-Qing Xia
https://arxiv.org/abs/2507.07786 …

Constraints on Axion-Like Particles from 16.5 Years of Fermi-LAT Data and Prospects for VLAST
Axion-like particles (ALPs), hypothetical particles beyond the Standard Model, are considered as promising dark matter candidates. ALPs can convert into photons and vice versa in a magnetic field via the Primakoff effect, potentially generating detectable oscillation in $γ$-ray spectra. This study analyzes 16.5 years of data from the Fermi Large Area Telescope (Fermi-LAT) on NGC 1275, the brightest galaxy in the Perseus cluster, to constrain the ALP parameter space. Our results improve the pre…

Dual-Backend Multibeam Position Switching Targeted SETI Observations toward Nearby Active Planet-Hosting Systems with FAST
Jian-Kang Li, Zhen-Zhao Tao, Pei Wang, Tong-Jie Zhang
https://arxiv.org/abs/2509.09654

Dual-Backend Multibeam Position Switching Targeted SETI Observations toward Nearby Active Planet-Hosting Systems with FAST
The Five-hundred-meter Aperture Spherical Telescope (FAST), the world's largest single-dish radio telescope, lists the search for extraterrestrial intelligence (SETI) as one of its key scientific objectives. In this work, we present a targeted SETI observation for 7 nearby active stars utilizing the FAST L-band multibeam receiver, employing a observational strategy that combines position switching with multibeam tracking to balance on-source integration time with the accuracy of the beam respon…

Chemical abundances and small-scale gas kinematics in the local star-forming galaxy NGC 2366
Anastasiya D. Yarovova, Ivan S. Gerasimov, Oleg V. Egorov, Alexei V. Moiseev, Konstantin I. Vasiliev, Tatiana A. Lozinskaya
https://arxiv.org/abs/2507.08651

Chemical abundances and small-scale gas kinematics in the local star-forming galaxy NGC 2366
We present a detailed spectroscopic study of ionised gas in the nearby (~3.3Mpc) dwarf galaxy NGC 2366, a local analogue of Green Pea galaxies, based on observations with the SCORPIO-2 instrument at the Russian 6-m BTA telescope. Using scanning Fabry-Perot interferometry and long-slit spectroscopy, we examine the gas kinematics, excitation mechanisms, and chemical abundances across the disc of NGC 2366, including its prominent starburst region Mrk 71 and the companion region NGC 2363. We identi…

Calibration and Performance Validation of the SST-1M Telescopes Using Crab Nebula Observations
Thomas Tavernier, Jakub Jury\v{s}ek, Vladimir Novotny
https://arxiv.org/abs/2508.08861

Calibration and Performance Validation of the SST-1M Telescopes Using Crab Nebula Observations
SST-1M is a prototype single mirror Small Sized Cherenkov Telescope designed for very high energy (VHE) gamma-ray astronomy. With a 4 meter primary mirror and a 5.6 meter focal length, it provides a wide 9 degree optical field of view, optimized for detecting VHE gamma-rays from 1 TeV to several hundred TeV. Its focal plane is equipped with DigiCam, a fully digital trigger and readout camera made of 1296 silicon photomultiplier (SiPM) pixels. The use of SiPM sensors enables observation under hi…

Hubble Space Telescope Observations of the Interstellar Interloper 3I/ATLAS
David Jewitt, Man-To Hui, Max Mutchler, Yoonyoung Kim, Jessica Agarwal
https://arxiv.org/abs/2508.02934

Hubble Space Telescope Observations of the Interstellar Interloper 3I/ATLAS
We present high angular resolution observations of the third known interstellar interloper, 3I/ATLAS, from the Hubble Space Telescope. The object is clearly active at 3.8 au pre-perihelion, showing dust emitted from the hot Sun-facing side of the nucleus and a weak, radiation pressure swept tail away from the Sun. We apply a simple model to estimate the mass loss rate in dust as dM/dt = 6 a kg/s, where a is the mean particle size in microns. With 1 < a < 100, we infer dM/dt = 6 to 60 kg/s. A fi…

Detection of Millimeter-Wavelength Flares from Two Accreting White Dwarf Systems in the SPT-3G Galactic Plane Survey
Y. Wan, J. D. Vieira, P. M. Chichura, T. J. Maccarone, A. J. Anderson, B. Ansarinejad, A. Anumarlapudi, M. Archipley, L. Balkenhol, P. S. Barry, K. Benabed, A. N. Bender, B. A. Benson, F. Bianchini, L. E. Bleem, F. R. Bouchet, L. Bryant, E. Camphuis, M. G. Campitiello, J. E. Carlstrom, C. L. Chang, P. Chaubal, A. Chokshi, T. -L. Chou, A. Coerver, T. M. Crawford, C. Daley…

Detection of Millimeter-Wavelength Flares from Two Accreting White Dwarf Systems in the SPT-3G Galactic Plane Survey
Blind discoveries of millimeter-wave (mm-wave) transient events in non-targeted surveys, as opposed to follow-up or pointed observations, have only become possible in the past decade using cosmic microwave background surveys. Here we present the first results from the SPT-3G Galactic Plane Survey -- the first dedicated high-sensitivity, wide-field, time-domain, mm-wave survey of the Galactic Plane, conducted with the South Pole Telescope (SPT) using the SPT-3G camera. The survey field covers ap…

The 4MOST-Cosmology Redshift Survey: Target Selection of Bright Galaxies and Luminous Red Galaxies
Aurelien Verdier, Antoine Rocher, Behnood Bandi, Johan Richard, Boudewijn Roukema, Jon Loveday, Elmo Tempel, Maciej Bilicki, Jean-Paul Kneib, Mathilde Guitton
https://arxiv.org/abs/2508.07311

The 4MOST-Cosmology Redshift Survey: Target Selection of Bright Galaxies and Luminous Red Galaxies
The Cosmology Redshift Survey of the 4-metre Multi-Object Spectroscopic Telescope (4MOST-CRS) will provide redshift measurements of galaxies and quasars over 5700{\degsq} in the southern hemisphere. As targets for the 4MOST-CRS, we present a selection of an $r<19.25$ magnitude limited sample of Bright Galaxies (BG) and a colour selected sample of Luminous Red Galaxies (LRG) based on DESI Legacy Survey DR10.1 photometric data, in the redshift ranges $0.1

Discovery of synchronized periodic variability of methanol maser features in G26.598-0.024
P. Wolak, M. Szymczak, A. Kobak, A. Varma, A. Bartkiewicz, J. O. Chibueze, B. Stecklum, C. J. Ugwu
https://arxiv.org/abs/2508.09308

Discovery of synchronized periodic variability of methanol maser features in G26.598-0.024
Aims. We report the discovery of periodic maser variability of an unusual pattern in the high-mass young stellar object G26.598-0.024. Methods. A ten-year monitoring of the 6.7 GHz methanol maser was carried out with the Torun 32 m radio telescope. The archival data collected so far were also used to characterize the target with high angular resolution and examine its infrared variability. Results. We found anticorrelated flux variations of the opposite blueshifted and redshifted emission featu…

Updated comparison of the UHECR energy spectra measured by the Pierre Auger Observatory and the Telescope Array
Douglas R. Bergman, Toshihiro Fujii, Kozo Fujisue, Keitaro Fujita, Jihyun Kim, Diego Ravignani, Felix Riehn, Markus Roth, Francesco Salamida, Yoshiki Tsunesada, Valerio Verzi
https://arxiv.org/abs/2509.05530

Updated comparison of the UHECR energy spectra measured by the Pierre Auger Observatory and the Telescope Array
The Pierre Auger and Telescope Array joint Working Group on the UHECR energy spectrum was established in 2012 to analyze energy scale uncertainties in both experiments and to in vestigate their systematic differences, particularly in the spectral shape of the flux measurements. Previous studies have indeed shown that, within systematic uncertainties, the energy s pectra measured by the two observatories are consistent below~$10\,\mathrm{EeV}$. However, at higher energies, a significant differen…

The superMIGHTEE project: MeerKAT and GMRT Together to Unveil the Deep Radio Sky
Dharam V. Lal (NCRA-TIFR), Russ Taylor (IDIA, Univ. of C.T., Univ. of W.C.), Srikrishna Sekhar (NRAO, IDIA, Univ. of C.T.), Ch. Ishwara-Chandra (NCRA-TIFR), Sushant Dutta (Univ. of C.T.), Sthabile Kolwa (UCT, Univ. of S.A.)
https://arxiv.org/abs/2509.09293

The superMIGHTEE project: MeerKAT and GMRT Together to Unveil the Deep Radio Sky
An international team of researchers has come together to undertake an ultra-broadband exploration of the deep radio sky. The superMIGHTEE project combines data from the MIGHTEE project, using the precursor Square Kilometre Array (SKA) MeerKAT telescope in South Africa, with observations from the upgraded Giant Metrewave Radio Telescope (uGMRT) in India to produce deep images at several $μ$Jy sensitivity over a frequency range of 200 MHz--2.5 GHz, with an angular resolution of a few arcseconds…

On-axis afocal telescopes as framework for Cubesat based astronomical imagers and slit-less spectrographs
Anwesh Kumar Mishra, Gourav Banerjee, Rekhesh Mohan, Maheswar Gopinathan
https://arxiv.org/abs/2507.08323

On-axis afocal telescopes as framework for Cubesat based astronomical imagers and slit-less spectrographs
Cubesats present unique opportunities for observational astronomy in the modern era. They are useful in observing difficult-to-access wavelength regions and long-term monitoring of interesting astronomical sources. However, conventional telescope designs are not necessarily the best fit for restricted envelope of a Cubesat. Additionally, fine-pointing stability on these platforms is difficult due to the low mass of the spacecraft and special allocations within the optical design are needed to a…

The #interstellar #comet #ATLAS with a 2-meter telescope, from the AT "Deep g'-band Imaging of Interstellar Comet 3I/ATLAS from the Two-meter Twin Telescope (TTT)" https://www.astronomerstelegram.org/?read=17264 - other observations were reported in https://www.astronomerstelegram.org/?read=17263 ("Interstellar Interloper C/2025 N1 is Active"), and there are a short JPL video at https://www.youtube.com/watch?v=-vzafaw0t08 and ESA and NASA press releases in https://www.esa.int/Space_Safety/Planetary_Defence/ESA_tracks_rare_interstellar_comet and https://science.nasa.gov/blogs/planetary-defense/2025/07/02/nasa-discovers-interstellar-comet-moving-through-solar-system/

Photometric Stability of an EMCCD Camera at 1-s Exposures
I. V. Afanasieva (Special Astrophysical Observatory of the Russian Academy of Sciences), V. G. Orlov (Instituto de Astronomia, Universidad Nacional Autonoma de Mexico), V. I. Ardilanov (Special Astrophysical Observatory of the Russian Academy of Sciences), V. A. Murzin (Special Astrophysical Observatory of the Russian Academy of Sciences), D. V. Oparin (Special Astrophysical Observatory of the Russian Academy of Sciences), A. N.…

Photometric Stability of an EMCCD Camera at 1-s Exposures
We present the results of testing an iXonUltra 888 EMCCDcamera to determine the operating parameters for short-exposure photometry of stars. As a result of the testing, those camera modes were selected in which the temporal instability of the electron multiplication charge does not significantly affect the light curves. In addition, the photometry of the eclipsing variable star ZTFJ 0038+2030, obtained with the Zeiss-1000 telescope of the Special Astrophysical Observatory of the Russian Academy…

Sensitivity toward dark matter annihilation imprints on 21-cm signal with SKA-Low: A convolutional neural network approach
Pravin Kumar Natwariya, Kenji Kadota, Atsushi J. Nishizawa
https://arxiv.org/abs/2508.08251

Sensitivity toward dark matter annihilation imprints on 21-cm signal with SKA-Low: A convolutional neural network approach
This study investigates the sensitivity of the radio interferometers to identify imprints of spatially inhomogeneous dark matter annihilation signatures in the 21-cm signal during the pre-reionization era. We focus on the upcoming low-mode survey of the Square Kilometre Array (SKA-Low) telescope. Using CNNs, we analyze simulated 3D 21-cm differential brightness temperature maps generated via the DM21cm code, which is based on 21cmFAST and DarkHistory, to distinguish between spatially homogeneou…

Volcanic Satellites Tidally Venting Na, K, SO2 in Optical & Infrared Light
Apurva V. Oza, Andrea Gebek, Moritz Meyer zu Westram, Armen Tokadjian, Anthony L. Piro, Renyu Hu, Athira Unni, Raghav Chari, Aaron Bello-Arufe, Carl A. Schmidt, Amy J. Louca, Yamila Miguel, Raissa Estrela, Jeehyun Yang, Mario Damiano, Yasuhiro Hasegawa, Luis Welbanks, Diana Powell, Rishabh Garg, Pulkit Gupta, Yuk L. Yung, Rosaly M. C. Lopes

Volcanic Satellites Tidally Venting Na, K, SO2 in Optical & Infrared Light
Recent infrared spectroscopy from the James Webb Space Telescope (JWST) has spurred analyses of common volcanic gases such as carbon dioxide (CO2), sulfur dioxide (SO2), alongside alkali metals sodium (Na I) and potassium (K I) surrounding the hot Saturn WASP-39 b. We report more than an order-of-magnitude of variability in the density of neutral Na, K, and SO2 between ground-based measurements and JWST, at distinct epochs, hinting at exogenic physical processes similar to those sourcing Io's e…

Radial Pulsations in Polaris: A Secondary Science Application of Cherenkov Telescopes via Intensity Interferometry
Km Nitu Rai, Prasenjit Saha, Subrata Sarangi
https://arxiv.org/abs/2508.09742

Radial Pulsations in Polaris: A Secondary Science Application of Cherenkov Telescopes via Intensity Interferometry
Ground-based Cherenkov telescopes, although typically inoperative during moonlit nights for gamma-ray observations, offer a valuable opportunity for secondary scientific applications through Intensity Interferometry (II). Recent developments and observations suggest that implementing II instrumentation on existing Imaging Atmospheric Cherenkov Telescopes (IACTs) or the Cherenkov Telescope Array (CTA) can significantly advance optical stellar measurements. Motivated by the resurgence of II effor…

Hubble Space Telescope Observations of the Interstellar Interloper 3I/ATLAS: #Interstellar Comet, Hubble Makes Size Estimate: https://science.nasa.gov/missions/hubble/as-nasa-missions-study-interstellar-comet-hubble-makes-size-estimate/ and https://www.esa.int/ESA_Multimedia/Images/2025/08/Hubble_sizes_up_rare_interstellar_comet (which is 5.6 km > nucleus diameter > 320 m, so we still don't know much here).

The time-domain gamma-ray sky seen by the Fermi-LAT
Giacomo Principe
https://arxiv.org/abs/2509.07660 https://arxiv.org/pdf/2509.07660

The time-domain gamma-ray sky seen by the Fermi-LAT
The Fermi Gamma-ray Space Telescope is currently celebrating its 15th anniversary of operation. Since its launch, the Fermi-Large Area Telescope (LAT), the main instrument onboard the Fermi satellite, has remarkably unveiled the sky at GeV energies providing outstanding results in time-domain gamma-ray astrophysics. In particular, LAT has observed some of the most powerful transient phenomena in the Universe (such as gamma-ray bursts, blazar flares, magnetar flares, ...) enabling the possibilit…

OWLS I: The Olin Wilson Legacy Survey
Brett M. Morris, Leslie Hebb, Suzanne L. Hawley, Kathryn Jones, Jake Romney
https://arxiv.org/abs/2507.07330 https://…

OWLS I: The Olin Wilson Legacy Survey
We present initial results from a planned 10 year survey of Ca II H & K emission, using observations made with the ARC 3.5m Telescope at Apache Point Observatory. The primary goal of the survey is to investigate activity cycles in low mass stars. The sample includes stars chosen from the legacy Mount Wilson survey carried out by Olin Wilson more than 50 years ago, together with newly identified planet-host stars and a select sample of early-mid M dwarfs. This paper presents the first four years…

The Small Magellanic Cloud through the lens of the James Webb Space Telescope : binaries and mass function within the galaxy outskirts
M. V. Legnardi, F. Muratore, A. P. Milone, G. Cordoni, T. Ziliotto, E. Dondoglio, A. F. Marino, A. Mastrobuono-Battisti, E. Bortolan, E. P. Lagioia, M. Tailo
https://arxiv.org/abs/2509.08687

The Small Magellanic Cloud through the lens of the James Webb Space Telescope : binaries and mass function within the galaxy outskirts
The stellar initial mass function (IMF) and the fraction of binary systems are fundamental ingredients that govern the formation and evolution of galaxies. Whether the IMF is universal or varies with environment remains one of the central open questions in astrophysics. Dwarf galaxies such as the Small Magellanic Cloud (SMC), with their low metallicity and diffuse star-forming regions, offer critical laboratories to address this issue. In this work, we exploit ultra-deep photometry from the Jam…

Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey. III. Detectability of Giant Exomoons of Wide Separation Giant Planets
Matthew Lastovka, B. Scott Gaudi, Samson A. Johnson, Matthew T. Penny, Eamonn Kerins, Nicholas J. Rattenbury
https://arxiv.org/abs/2509.03492

Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey. III. Detectability of Giant Exomoons of Wide Separation Giant Planets
The Nancy Grace Roman Space Telescope (Roman) will conduct a Galactic Exoplanet Survey (RGES) to discover bound and free-floating exoplanets using gravitational microlensing. Roman should be sensitive to lenses with mass down to ~ 0.02 $M_{\oplus}$, or roughly the mass of Ganymede. Thus the detection of moons with masses similar to the giant moons in our Solar System is possible with Roman. Measuring the demographics of exomoons will provide constraints on both moon and planet formation. We con…

Exploring the Origins of Optical Variability in AGNs: Correlations with Black Hole Properties, X-ray, and Radio Emission
Vivek Kumar Jha, Debbijoy Bhattacharya, Hum Chand
https://arxiv.org/abs/2508.06610

Exploring the Origins of Optical Variability in AGNs: Correlations with Black Hole Properties, X-ray, and Radio Emission
We study the optical variability characteristics of Active Galactic Nuclei (AGN) from the Swift Burst Alert Telescope (BAT) AGN catalogue by utilising approximately five years of optical light curves from the Zwicky Transient Facility (ZTF) survey. We investigate dependencies of the long-term optical variability amplitudes and timescales on (i) supermassive black hole (SMBH) mass, luminosity, and Eddington ratio to explore the influence of accretion disk dynamics and radiative processes; (ii) X…

Unveiling Unprecedented Fine Structure in Coronal Flare Loops with the #DKIST: https://iopscience.iop.org/article/10.3847/2041-8213/adf95e -> The NSF Inouye Solar Telescope Delivers Record-Breaking Images of Solar Flare, Coronal Loops: https://nso.edu/press-release/the-nsf-inouye-solar-telescope-delivers-record-breaking-images-of-solar-flare-coronal-loops/

Introduction to the China Space Station Telescope (CSST)
CSST Collaboration, Yan Gong, Haitao Miao, Hu Zhan, Zhao-Yu Li, Jinyi Shangguan, Haining Li, Chao Liu, Xuefei Chen, Haibo Yuan, Jilin Zhou, Hui-Gen Liu, Cong Yu, Jianghui Ji, Zhaoxiang Qi, Jiacheng Liu, Zigao Dai, Xiaofeng Wang, Zhenya Zheng, Lei Hao, Jiangpei Dou, Yiping Ao, Zhenhui Lin, Kun Zhang, Wei Wang, Guotong Sun, Ran Li, Guoliang Li, Youhua Xu, Xinfeng Li, Shengyang Li, Peng Wu, Jiuxing Zhang, Bo Wang, Jinming Bai, Yi-Fu…

Introduction to the China Space Station Telescope (CSST)
The China Space Station Telescope (CSST) is a next-generation Stage-IV sky survey telescope, distinguished by its large field of view (FoV), high image quality, and multi-band observation capabilities. It can simultaneously conduct precise measurements of the Universe by performing multi-color photometric imaging and slitless spectroscopic surveys. The CSST is equipped with five scientific instruments, i.e. Multi-band Imaging and Slitless Spectroscopy Survey Camera (SC), Multi-Channel Imager (M…

Unveiling Unprecedented Fine Structure in Coronal Flare Loops with the DKIST
Cole A. Tamburri, Maria D. Kazachenko, Gianna Cauzzi, Adam F. Kowalski, Ryan French, Rahul Yadav, Caroline L Evans, Yuta Notsu, Marcel F. Corchado-Albelo, Kevin P. Reardon, Alexandra Tritschler
https://arxiv.org/abs/2508.05875…

Unveiling Unprecedented Fine Structure in Coronal Flare Loops with the DKIST
We present the highest-resolution H$α$ observations of a solar flare to date, collected during the decay phase of an X1.3-class flare on 8 August 2024 at 20:12 UT. Observations with the Visible Broadband Imager at the National Science Foundation's (NSF) Daniel K. Inouye Solar Telescope reveal dark coronal loop strands at unprecedented spatial resolution in the flare arcade above highly structured chromospheric flare ribbons. After surveying the 20 best-seeing images, we calculate a mean loop w…

Little Red Dots from Small-Scale Primordial Black Hole Clustering
Borui Zhang, Wei-Xiang Feng, Haipeng An
https://arxiv.org/abs/2507.07171 https://

Little Red Dots from Small-Scale Primordial Black Hole Clustering
The James Webb Space Telescope (JWST) observations have identified a class of compact galaxies at high redshifts ($4 \lesssim z \lesssim 11$), dubbed "little red dots" (LRDs). The supermassive black holes (SMBHs) of $10^{5-8}{\rm\,M}_{\odot}$ in LRDs favor a heavy-seed origin. We propose a mechanism for their formation: Clusters of primordial black holes, formed through long-short mode coupling on small scales in the early Universe, undergo sequential mergers over extended timescales. This mech…

Pushchino Multibeam Pulsar Search. VIII. Pulsar with a period of 40.9~s in observations of the LPA LPI
S. A. Tyul'bashev, G. E. Tyul'basheva, S. A. Andrianov, M. A. Kitaeva
https://arxiv.org/abs/2508.06983

Pushchino Multibeam Pulsar Search. VIII. Pulsar with a period of 40.9~s in observations of the LPA LPI
A search has been carried out for the pulsar J0311+1402, which has a period of $P = 40.9$ s, in the data archive of the Large Phased Array (LPA) radio telescope. When searching using fast folding algorithm (FFA), periodic pulsar radiation at a frequency of 111 MHz was not detected. In 3321 observation sessions lasting 5 minutes, 35 strong pulses were detected with a signal-to-noise ratio (S/N) greater than 10. Some of the pulses have a complex multi-peak structure consisting of narrow details, …

Faint southern spectrophotometric standard stars
N. P. Gentile Fusillo, S. Moehler, N. Przybilla, A. K. Elms, P. -E. Tremblay, W. Kausch, F. Kerber
https://arxiv.org/abs/2508.05758

Faint southern spectrophotometric standard stars
Context. The advent of the Extremely Large Telescope (ELT) will increase the collecting area by more than an order of magnitude compared to the individual Unit Telescopes of the Very Large Telescope (VLT). Fainter spectrophotometric standard stars than those currently available in the V = 11 to 13 mag (K = 12 to 14 mag) range are required for spectroscopic observations with instruments such as the Multi-AO Imaging Camera for Deep Observations (MICADO) on the ELT, notably in the near-infrared wa…

Optical and Near-Infrared Spectroscopy of the Outbursting Comet 12P/Pons-Brooks
Ruining Zhao, Bin Yang, Michael S. P. Kelley, Silvia Protopapa, Aigen Li, Yang Huang, Jifeng Liu
https://arxiv.org/abs/2507.03247

Optical and Near-Infrared Spectroscopy of the Outbursting Comet 12P/Pons-Brooks
We present optical and near-infrared (NIR) observations of the outbursting, Halley-type comet 12P/Pons-Brooks. Three NIR spectra were obtained during two outbursts in October and November 2023, with the 3-meter Infrared Telescope Facility and the Palomar 200-inch Telescope, respectively. The NIR spectra exhibited absorption features at 1.5 and 2.0 $μ$m, consistent with the diagnostic absorption bands of water ice, superimposed on a red dust-scattering continuum. We find that the absorption ban…

Euclid: Early Release Observations. Weak gravitational lensing analysis of Abell 2390
T. Schrabback, G. Congedo, R. Gavazzi, W. G. Hartley, H. Jansen, Y. Kang, F. Kleinebreil, H. Atek, E. Bertin, J. -C. Cuillandre, J. M. Diego, S. Grandis, H. Hoekstra, M. K\"ummel, L. Linke, H. Miyatake, N. Okabe, S. Paltani, M. Schefer, P. Simon, F. Tarsitano, A. N. Taylor, J. R. Weaver, R. Bhatawdekar, M. Montes, P. Rosati, S. Toft, B. Altieri, A. Amara, L. Amendola, S. Andreon, N. Auricchio, C.…

Euclid: Early Release Observations. Weak gravitational lensing analysis of Abell 2390
The Euclid space telescope of the European Space Agency (ESA) is designed to provide sensitive and accurate measurements of weak gravitational lensing distortions over wide areas on the sky. Here we present a weak gravitational lensing analysis of early Euclid observations obtained for the field around the massive galaxy cluster Abell 2390 as part of the Euclid Early Release Observations programme. We conduct galaxy shape measurements using three independent algorithms (LensMC, KSB+, and Source…

High-resolution Giant Metrewave Radio Telescope H{\sc i} 21\,cm imaging of the host galaxy of FRB\,20250316A
Balpreet Kaur (Inter-University Centre for Astronomy and Astrophysics, India), Nissim Kanekar (National Centre for Radio Astrophysics, India), J. Xavier Prochaska (UCO/Lick Observatory, USA)
https://arxiv.org/abs/2509.04563

High-resolution Giant Metrewave Radio Telescope H{\sc i} 21\,cm imaging of the host galaxy of FRB\,20250316A
We report Giant Metrewave Radio Telescope (GMRT) \hii\ imaging of NGC\,4141, the host galaxy of FRB\,20250316A at $z=0.0063$. Our GMRT \hii\ images have spatial resolutions, at $z\approx0.0063$, of $\approx0.48-8.0$~kpc, and find evidence for (i)~a companion galaxy, LEDA\,2582852, to the south-west, (ii)~a nearby (27-kpc distant) H{\sc{i}} cloud to the south-west, (iii)~disturbances in the H{\sc{i}} distributions of both NGC\,4141 and LEDA\,2582852, and (iv)~high H{\sc{i}} column densities in t…

Millisecond Pulsars in M2: New discoveries and a detailed timing analysis
Baoda Li, Kuo Liu, Lin Wang, Shunyi Lan, P. C. C. Freire, Pinsong Zhao, Liyun Zhang, Zhengwei Liu, Lei Qian, Wu Jiang, Dejiang Yin, Yaowei Li, Yinfeng Dai, Yang Liu, Xiangcun Meng, Zhichen Pan
https://arxiv.org/abs/2508.06726…

Millisecond Pulsars in M2: New discoveries and a detailed timing analysis
Globular clusters (GCs) offer a unique environment for discovering and studying millisecond pulsars. In this paper, we present a multi-epoch search and detailed timing analysis of millisecond pulsars in the GC M2, using the Five-hundred-meter Aperture Spherical Telescope. We have discovered two new binary millisecond pulsars in M2, designated M2F and M2G, respectively. We provide measurements of the emission properties of all known pulsars in M2, including their polarization profiles, rotation …

A previously unknown regular satellite of #Uranus has been detected in a series of images obtained by the Near-Infrared Camera (NIRCam) onboard the James Webb Space Telescope on 2025 Feb. 2: http://www.cbat.eps.harvard.edu/iau/cbet/005500/CBET005593.txt -> https://science.nasa.gov/blogs/webb/2025/08/19/new-moon-discovered-orbiting-uranus-using-nasas-webb-telescope/ - the object is located at a projected radial distance of 56250 /- 250 km from Uranus' center in the planet's equatorial plane, initial astrometry is consistent with the moon orbiting on a nearly circular orbit with an orbital period 0.402 days, and the observed IR flux from the object indicates a radius of 4 - 5 km, placing it well below the detection threshold of earlier images from Voyager and the Hubble Space Telescope.

Design, Fabrication and Characterization of the Thermal Filter Assembly on the Solar Ultraviolet Imaging Telescope (SUIT) on-board Aditya- L1
Janmejoy Sarkar, Avyarthana Ghosh, Sreejith Padinhatteeri, Ravi Kesharwani, Ramaprakash A. N., Durgesh Tripathi, Bhargava Ram B. S., R. Venkateshwaran, Ketan Patel, Melvin James, Mintu Karmakar, Akshay Kulkarni, Deepa Modi, Chaitanya Rajarshi, Girish M. Gouda, Aafaque R. Khan, Abhijit Adoni, Sajjade F. Mustafa, Pravin Khodade, Abhay Kohok

Design, Fabrication and Characterization of the Thermal Filter Assembly on the Solar Ultraviolet Imaging Telescope (SUIT) on-board Aditya- L1
The Solar Ultraviolet Imaging Telescope (SUIT) observes the Sun in the near-ultraviolet regime on board the Aditya-L1 satellite, India's dedicated mission to study the Sun. SUIT will image the Sun in the wavelength range of 200-400 nm using 11 science bandpasses with varying spectral bandwidths between 0.1-58 nm. Within this range, the Sun provides huge incoming solar flux to the telescope that also varies by a factor of ~ 20 from the lower end to the upper end of the wavelength band of interes…

Neutrino and Electromagnetic Signals from Tidal Disruption Events: Bridging the Theory with Observations
Chengchao Yuan, Walter Winter, Cecilia Lunardini, B. Theodore Zhang, Kohta Murase, Bing Zhang
https://arxiv.org/abs/2508.07940

Neutrino and Electromagnetic Signals from Tidal Disruption Events: Bridging the Theory with Observations
This proceeding presents recent results from a joint analysis of time-dependent neutrino and electromagnetic emissions from tidal disruption events (TDEs), using both isotropic wind models and relativistic jets. We discuss constraints from Fermi Large Area Telescope (LAT) $γ$-ray upper limits on the size of the radiation zone and the maximum energies of accelerated cosmic rays, as well as the resulting neutrino productions from TDEs and candidates, including AT 2019dsg, AT 2019fdr, AT 2019aalc…

Reionization in Protocluster Environments at $z>7$ with JWST/NIRSpec
Qiong Li, Christopher J. Conselice, Duncan Austin, Tom Harvey, Nathan Adams, Vadim Rusakov, Lewi Westcott
https://arxiv.org/abs/2508.08037

Reionization in Protocluster Environments at $z>7$ with JWST/NIRSpec
Understanding the role of high-redshift protoclusters in cosmic reionization is essential to unveiling the early stages of structure formation. Using deep imaging and spectroscopy from the James Webb Space Telescope (JWST) JADES Deep Survey in GOODS-South, we identify two prominent protoclusters at z>7 and investigate their environmental properties in comparison to field galaxies. Protocluster members exhibit systematically higher ionizing photon production efficiency ($ξ_{\text{ion}}$) and in…

Baryonification II: Constraining feedback with X-ray and kinematic Sunyaev-Zel'dovich observations
Michael Kova\v{c}, Andrina Nicola, Jozef Bucko, Aurel Schneider, Robert Reischke, Sambit K. Giri, Romain Teyssier, Matthieu Schaller, Joop Schaye
https://arxiv.org/abs/2507.07991

Baryonification II: Constraining feedback with X-ray and kinematic Sunyaev-Zel'dovich observations
Baryonic feedback alters the matter distribution on small and intermediate scales, posing a challenge for precision cosmology. The new, component-wise baryonification (BFC) approach provides a self-consistent framework to model feedback effects for different observables. In this paper we use this framework to fit kinematic Sunyaev-Zel'dovich (kSZ) observations from the Atacama Cosmology Telescope (ACT) alongside halo X-ray gas fractions from eROSITA, investigating baryonic feedback in a cosmolo…

Radiation damage to the Hubble Space Telescope during two Solar cycles, and correction of Charge Transfer Inefficiency
Richard Massey, Jacob A. Kegerreis, Juan Paolo Lorenzo Gerardo Barrios, James W. Nightingale, Richard G. Hayes, David Lagattuta, Zane D. Lentz, Gavin Leroy, Jesper Skottfelt, Maximilian von Wietersheim-Kramsta
https://arxi…

Radiation damage to the Hubble Space Telescope during two Solar cycles, and correction of Charge Transfer Inefficiency
From 2002 to 2025, the Hubble Space Telescope's Advanced Camera for Surveys has suffered in the harsh radiation environment above the protection of the Earth's atmosphere. We track the degradation of its image quality, as Solar protons and galactic cosmic rays have damaged its photosensitive charge-coupled device (CCD) imaging sensors. The damage is consistent with defects in the silicon lattice that have all annealed into one of three configurations. The rate of damage in low Earth orbit is mo…

Deep imaging of the galaxy Malin 2 shows new faint structures and a candidate satellite dwarf galaxy
Junais, Ignacio Ruiz Cejudo, Sergio Guerra Arencibia, Ignacio Trujillo, Miguel R. Alarcon, Miquel Serra-Ricart, Johan H. Knapen, Pierre-Alain Duc
https://arxiv.org/abs/2508.07930

Deep imaging of the galaxy Malin 2 shows new faint structures and a candidate satellite dwarf galaxy
Giant Low Surface Brightness (GLSB) galaxies are extreme disk systems with exceptionally large sizes and low stellar densities. Their formation and evolution remain poorly constrained due to the challenges of detecting their faint disks. We present deep, multi-band optical imaging of Malin 2, a prototypical GLSB galaxy, with the newly commissioned Two-meter Twin Telescope (TTT) at the Teide Observatory. Our $g$, $r$, and $i$-band data reach surface brightness depths of 30.3, 29.5, and 28.2 mag …

Probing ultra-high-energy neutrinos with the IceCube-Gen2 in-ice radio array
Christian Glaser (for the IceCube-Gen2 Collaboration)
https://arxiv.org/abs/2507.07813

Probing ultra-high-energy neutrinos with the IceCube-Gen2 in-ice radio array
The next generation neutrino telescope, IceCube-Gen2, will be sensitive to the astrophysical and cosmogenic flux of neutrinos across a broad energy range, from the TeV to the EeV scale. The planned design includes 8 cubic kilometers of ice instrumented with approximately 10,000 optical sensors, a surface array, and a radio array of antennas embedded in the ice laid out sparsely over 500 km^2. The radio array provides sensitivity to ultra-high energy neutrinos using independent radio stations th…

Feedback-Controlled Beam Pattern Measurement Method Using a Power-Variable Calibration Source for Cosmic Microwave Background Telescopes
Haruaki Hirose, Masaya Hasegawa, Daisuke Kaneko, Taketo Nagasaki, Ryota Takaku, Tijmen de Haan, Satoru Takakura, Takuro Fujino
https://arxiv.org/abs/2509.09386

Feedback-Controlled Beam Pattern Measurement Method Using a Power-Variable Calibration Source for Cosmic Microwave Background Telescopes
We demonstrate a novel beam pattern measurement method for the side lobe characterization of cosmic microwave background telescopes. The method employs a power-variable artificial microwave source under feedback control from the detector under test on the telescope. It enables us to extend the dynamic range of the beam pattern measurement without introducing nonlinearity effects from the detector. We conducted a laboratory-based proof-of-concept experiment, measuring the H-plane beam pattern of…

Deep learning-based prediction of Precipitable Water Vapor in the Chajnantor area
Alison Matus-Bello, Silvia E. Restrepo, Ricardo Bustos, Yi Hu, Fujia Du, Jaime Cari\~ne, Pablo Garc\'ia, Rodrigo Reeves, Zhaohui Shang
https://arxiv.org/abs/2509.09575

Deep learning-based prediction of Precipitable Water Vapor in the Chajnantor area
Astronomical observations at millimeter and submillimeter wavelengths heavily depend on the amount of Precipitable Water Vapor (PWV) in the atmosphere, directly affecting the sky transparency and degrading the quality of the signals received by radio telescopes. Predictions of PWV at different forecasting horizons is crucial to support telescope operations, engineering planning, and observational scheduling and efficiency of radio observatories installed in the Chajnantor area in northern Chile…

20 GeV halo-like excess of the Galactic diffuse emission and implications for dark matter annihilation
Tomonori Totani
https://arxiv.org/abs/2507.07209 htt…

20 GeV halo-like excess of the Galactic diffuse emission and implications for dark matter annihilation
Fifteen years of the Fermi Large Area Telescope (LAT) data in the halo region of the Milky Way (MW) are analyzed to search for gamma rays from dark matter annihilation. Gamma-ray maps within the region of interest ($|l| \le 60$ deg, $10 \le |b| \le 60$ deg) are modeled using point sources, the GALPROP models of cosmic-ray interactions, isotropic background, and templates of Loop I and the Fermi bubbles, and then the presence of a halo-like component is further examined. A st…

The Shape of AGN-Driven Winds in the Seyfert Galaxy NGC 3516
Jacob Tutterow, Nicholas Ferree, D. Michael Crenshaw, Julia Falcone, Maura Kathleen Shea, Travis C. Fischer, Beena Meena, Mitchell Revalski, Kesha Patel, Madeline Davis
https://arxiv.org/abs/2509.06476

The Shape of AGN-Driven Winds in the Seyfert Galaxy NGC 3516
Active galactic nuclei (AGN) are known to drive ionized gas into their host galaxies, which may affect the evolution of both the central supermassive black holes and their hosts. In the case of NGC 3516, a nearby Seyfert 1 galaxy, these AGN winds have historically proven difficult to disentangle from galactic rotation. Using long slit spectroscopy at multiple position angles from the Hubble Space Telescope Space Telescope Imaging Spectrograph and the Apache Point Observatory Kitt Peak Ohio Stat…

Measurement of dome turbulence intensity from scintillation pattern in the pupil of the telescope
Victor G. Kornilov, Matwey V. Kornilov, Boris S. Safonov, Anton S. Mironov, Dmitry V. Cheryasov, Igor A. Gorbunov, Ivan A. Strakhov
https://arxiv.org/abs/2509.02298

Measurement of dome turbulence intensity from scintillation pattern in the pupil of the telescope
We present measurements of optical turbulence (OT) power inside the telescope dome using an instrument registering fluctuations of intensity of a bright star at a plane conjugated to -2 km below the pupil of the telescope - Domecam. The measurements were conducted at the 2.5-m telescope of Caucasian Mountain Observatory of Sternberg Astronomical Institute Lomonosov Moscow State University in period 2022-2024 in different ambient conditions. The instrument was validated against Multi Aperture Sc…

Fermi-LAT Galactic Center Excess morphology of dark matter in simulations of the Milky Way galaxy
Moorits Mihkel Muru, Joseph Silk, Noam I. Libeskind, Stefan Gottloeber, Yehuda Hoffman
https://arxiv.org/abs/2508.06314

Fermi-LAT Galactic Center Excess morphology of dark matter in simulations of the Milky Way galaxy
The strongest experimental evidence for dark matter is the Galactic Center gamma-ray excess observed by the Fermi telescope and even predicted prior to discovery as a potential dark matter signature via WIMP dark matter self-annihilations. However, an equally compelling explanation of the excess gamma-ray flux appeals to a population of old millisecond pulsars that also accounts for the observed boxy morphology inferred from the bulge old star population. We employ a set of Milky Way-like galax…

tilepy: Smart Scheduling for Multi-Messenger Astronomy from Earth to Orbit
Halim Ashkar, Monica Seglar-Arroyo, Fabian Sch\"ussler, Weizmann Kiendr\'eb\'eogo, Mathieu de Bony de Lavergne
https://arxiv.org/abs/2508.07824

tilepy: Smart Scheduling for Multi-Messenger Astronomy from Earth to Orbit
The rise of direct detection of gravitational waves (GWs) started a new era in multi-messenger astrophysics. Like GWs, many other astrophysical transient sources suffer from poor localization, which can span tens to thousands of square degrees in the sky. Moreover, as the detection horizon for these transients widens and the detection rate increases, current electromagnetic follow-up facilities require tools to optimize the follow-up of poorly localized events and save valuable telescope time f…

Black hole mass function shift in proto-stellar-clusters driven by gas accretion
Zacharias Roupas
https://arxiv.org/abs/2509.08448 https://arxiv.org/pdf/25…

Black hole mass function shift in proto-stellar-clusters driven by gas accretion
The James Webb Space Telescope (JWST) has observed compact, massive proto-stellar clusters of low metallicity in the Cosmic Gems arc galaxy at high redshift, which represent likely precursors to globular clusters. We model the mass growth of stellar black holes (BHs) during the first few Myr of the life of a massive, compact, gaseous stellar cluster before stellar feedback expels the primordial gas. At high redshift, in a lower metallicity environment stellar winds get weaker allowing for large…

Testing Gamma/Hadron Separation for Ultra-High-Energy Cherenkov Astronomy
Sruthiranjani Ravikularaman (for the PANOSETI Collaboration), Felix Riehn, Dominik Elsaesser
https://arxiv.org/abs/2508.01354

Testing Gamma/Hadron Separation for Ultra-High-Energy Cherenkov Astronomy
Dark100 is a planned array of six telescopes, using the Panoramic Search for Extraterrestrial Intelligence (PANOSETI) telescope system. It will operate as an imaging atmospheric Cherenkov telescope array, with a telescope design and array layout optimized for accessing gamma rays with tens of TeV to PeV energies. The science goals of Dark100 include the search for ultra-heavy dark matter, observations of Galactic Pevatrons, and the search for ultra-fast optical transients. Rejection of backgrou…

IXPE view of the Sco-like source GX 349 2 in the normal branch
Fabio La Monaca, Anna Bobrikova, Juri Poutanen, Francesco Coti Zelati, Maura Pilia, Alexandra Veledina, Matteo Bachetti, Vladislav Loktev, Fei Xie
https://arxiv.org/abs/2507.07163

IXPE view of the Sco-like source GX 349+2 in the normal branch
We present a detailed spectropolarimetric study of the Sco-like Z-source GX 349+2, simultaneously observed with the Imaging X-ray Polarimetry Explorer (IXPE) and Nuclear Spectroscopic Telescope Array (NuSTAR). During the observations GX 349+2 was found mainly in the normal branch. A model-independent polarimetric analysis yields a polarisation degree of $1.1\% \pm 0.3\%$ at a polarisation angle of $29° \pm 7°$ in the 2--8 keV band, with ${\sim}4.1σ$ confidence level significance. No variabil…

A Deep SETI Search for Technosignatures in the TRAPPIST-1 System with FAST
Guang-Yuan Song, Zhen-Zhao Tao, Bo-Lun Huang, Yan Cui, Bo Yu, Tong-Jie Zhang
https://arxiv.org/abs/2509.06310

A Deep SETI Search for Technosignatures in the TRAPPIST-1 System with FAST
The Five-hundred-meter Aperture Spherical Telescope (FAST) is the world's largest single-dish radio telescope, and the search for extraterrestrial intelligence (SETI) is one of its five key science objectives. We conducted a targeted narrowband search toward the TRAPPIST-1 system using FAST. The observations consisted of five independent L-band pointings, each with a 20-minute integration, for a total on-source time of 1.67h. The frequency coverage spanned 1.05--1.45GHz with a spectral resoluti…

Illuminating Hidden Pulsars: Scintillation-Enhanced Discovery of Two Binary Millisecond Pulsars in M13 with FAST
Dejiang Yin, Lin Wang, Li-yun Zhang, Lei Qian, Baoda Li, Kuo Liu, Bo Peng, Yinfeng Dai, Yaowei Li, Zhichen Pan
https://arxiv.org/abs/2508.05998

Illuminating Hidden Pulsars: Scintillation-Enhanced Discovery of Two Binary Millisecond Pulsars in M13 with FAST
We conducted a sensitive acceleration search using Fast Fourier Transform (FFT) techniques on full-length and segmented data from 84 observations of the globular cluster M13 with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Employing a low detection threshold (2 $σ$) to maximize sensitivity to faint pulsars, here we report the discovery of two binary millisecond pulsars: J1641+3627G (M13G) and J1641+3627H (M13H). Both pulsars were detected during scintillation-brightened s…

Crosslisted article(s) found for astro-ph.GA. https://arxiv.org/list/astro-ph.GA/new
[1/1]:
- Discovery of a $z \sim 0.8$ Ultra Steep Spectrum Radio Halo in the MeerKAT-South Pole Telescope S...
Isaac S. Magolego, et al.

Search for a photon peak from keV-scale dark matter annihilation with NuSTAR: Constraints on $\langle \sigma v \rangle$ after 11 years of observations
E. I. Zakharov, V. V. Barinov, D. S. Gorbunov, R. A. Krivonos, A. A. Mukhin
https://arxiv.org/abs/2509.08506

Search for a photon peak from keV-scale dark matter annihilation with NuSTAR: Constraints on $\langle σv \rangle$ after 11 years of observations
We report new constraints on the velocity-independent annihilation cross section $\langle σv \rangle$ of keV-scale dark matter particles based on 11 years of observations with the NuSTAR X-ray telescope. Using the unfocused stray light mode of the instrument, which provides a wide field-of-view and a stable instrumental background, we perform a sensitive search for photon signatures from dark matter annihilation in the Galactic halo. We model the resulting diffuse X-ray spectrum over the 3-20 …

Modeling the Multiwavelength Emission of 3C 279 during the 14 years of Fermi-LAT Era
Krishna Mohana A, Alok C. Gupta, Junhui Fan, Narek Sahakyan, Claudia M. Raiteri, Lang Cui, Anne Lahteenmaki, Mark Gurwell, Merja Tornikoski, Massimo Villata
https://arxiv.org/abs/2507.03913

Modeling the Multiwavelength Emission of 3C 279 during the 14 years of Fermi-LAT Era
We report the results of our long-term multiwavelength spectral energy distribution (SED) study on the flat spectrum radio quasar 3C 279 during the $\sim14$ years (2008--2022) of {\sl Fermi}-LAT (Large Area Telescope) observing period. The {\sl Fermi}-LAT data were complemented with data in other wavebands obtained from {\sl Swift}-XRT/UVOT, Whole Earth Blazar Telescope (WEBT), along with other optical and radio data from several observatories. Different activity states were identified from the…

Replaced article(s) found for astro-ph.IM. https://arxiv.org/list/astro-ph.IM/new
[1/1]:
- The Simons Observatory: Science Goals and Forecasts for the Enhanced Large Aperture Telescope
The Simons Observatory Collaboration, et al.

Development of Space Qualified Signal Processing Readout Electronics for HabWorlds and Origins Space Telescope Detector and Arrays
Tracee Jamison-Hooks, Lynn Miles, Sanetra Newman-Bailey, Oketa Basha, Sarah E Kay, Sean Bryan, Philip Mauskopf, Thomas Essinger-Hileman, Jason Glen, Sumit Dahal, Adrian Sinclair, Kathryn Chamberlain
https://arx…

Development of Space Qualified Signal Processing Readout Electronics for HabWorlds and Origins Space Telescope Detector and Arrays
The Habitable Worlds Observatory (HWO), a flagship ultraviolet/optical/infrared space telescope recommended by the National Academies' Pathways to Discovery in Astronomy and Astrophysics, will require detector technologies capable of supporting significantly larger pixel-count arrays than previous missions. Microwave Kinetic Inductance Detectors (MKIDs), naturally suited to microwave multiplexing readout, are already in use across several balloon-borne missions with FPGA-based systems. To trans…