Tootfinder

Astronomie: Virtuelles Teleskop dank Lasertechnik deutlich leistungsfähiger
Für bessere Aufnahmen kann die Europäische Südsternwarte vier optische Teleskope zusammenschalten. Nun steht dank Lasertechnik ein großer Qualitätssprung an.

Image reconstruction with the #JWST Interferometer / AMIGO - a Data-Driven Calibration of the JWST Interferometer: https://arxiv.org/abs/2510.10924 / https://arxiv.org/abs/2510.09806 -> How we sharpened the James Webb telescope’s vision from a million kilometres away: https://theconversation.com/how-we-sharpened-the-james-webb-telescopes-vision-from-a-million-kilometres-away-262510 -> thread https://bsky.app/profile/benjaminpope.bsky.social/post/3m34san6dd22m

Reconstruction of Energy of Ultra-High-Energy Cosmic Rays Registered with a Fluorescence Telescope: One Time Frame Might Be Enough
Mikhail Zotov (for the JEM-EUSO collaboration), Andrei Trusov (for the JEM-EUSO collaboration)
https://arxiv.org/abs/2510.10783

Reconstruction of Energy of Ultra-High-Energy Cosmic Rays Registered with a Fluorescence Telescope: One Time Frame Might Be Enough
We address the challenge of reconstructing the energy of three ultra-high-energy cosmic rays registered with a small fluorescence telescope EUSO-TA that operated in 2015 at the site of the Telescope Array experiment in Utah, USA. Each of these events was recorded within one time frame. Conventional methods of energy reconstruction are not applicable in this case because the events do not have light curves but a single data point. As an alternative, we consider a number of approaches based on ar…

🇺🇦 #NowPlaying on KEXP's #MorningShow
Oasis:
🎵 Live Forever
#Oasis
https://justanotherandrew.bandcamp.com/track/oasis-live-forever-cover
https://open.spotify.com/track/6TlQ5fbojNRuG0hPQMbxeW

Event Horizon Telescope Pattern Speeds in the Visibility Domain
Nicholas S. Conroy, Michi Baub\"ock, Vedant Dhruv, Daeyoung Lee, Chi-kwan Chan, Abhishek V. Joshi, Ben Prather, Charles F. Gammie
https://arxiv.org/abs/2510.08848

Event Horizon Telescope Pattern Speeds in the Visibility Domain
The Event Horizon Telescope is preparing to produce time sequences of black hole images, or movies. In anticipation, we developed an autocorrelation technique to measure apparent rotational motion using the image-domain pattern speed $Ω_p$. Here, we extend this technique to the visibility domain and introduce the visibility amplitude pattern speed $Ω_{\mathrm{VA}}$. We show that in the Illinois v3 library of EHT source models, $Ω_{\mathrm{VA}}$ depends on the source inclination, black hole m…

LAP1-B is the First Observed System Consistent with Theoretical Predictions for Population III Stars
#Astrophysics

LAP1-B is the First Observed System Consistent with Theoretical Predictions for Population III Stars
Recently, Nakajima et al. (2025) presented James Webb Space Telescope observations of the $z=6.6$ Population III (Pop III) candidate LAP1-B, which is gravitationally lensed by galaxy cluster MACS J0416. We argue that this is the first object to agree with three key theoretical predictions for Pop III stars: (1) formation in extremely low-metallicity halos with virial temperatures ranging from $T_{\rm vir}\sim 10^3-10^4~{\rm K}$, (2) a top-heavy initial mass function, and (3) formation of low-ma…

Ultra-Faint Milky Way Satellites Discovered in Carina, Phoenix, and Telescopium with DELVE Data Release 3
C. Y. Tan (DELVE,DES Collaboration), W. Cerny (DELVE,DES Collaboration), A. B. Pace (DELVE,DES Collaboration), J. A. Sharp (DELVE,DES Collaboration), K. Overdeck (DELVE,DES Collaboration), A. Drlica-Wagner (DELVE,DES Collaboration), J. D. Simon (DELVE,DES Collaboration), B. Mutlu-Pakdil (DELVE,DES Collaboration), D. J. Sand (DELVE,DES Collaboration), A. M. Senkevich (DELVE,DES Coll…

Ultra-Faint Milky Way Satellites Discovered in Carina, Phoenix, and Telescopium with DELVE Data Release 3
We report the discovery of three Milky Way satellite candidates: Carina IV, Phoenix III, and DELVE 7, in the third data release of the DECam Local Volume Exploration survey (DELVE). The candidate systems were identified by cross-matching results from two independent search algorithms. All three are extremely faint systems composed of old, metal-poor stellar populations ($τ\gtrsim 10$ Gyr, [Fe/H] $ \lesssim -1.4$). Carina IV ($M_V = -2.8;\ r_{1/2} = 40 {\rm pc}$) and Phoenix III ($M_V = -1.2;\ …

Lapsiköyhyyden lisääminen on julmaa politiikkaa #yhteiskunta

Lapsiköyhyyden lisääminen on julmaa politiikkaa
Lapsiperheiden köyhyyden torjuminen on järkevää talouspolitiikkaa, tehokasta turvallisuuspolitiikkaa ja viisasta koulutuspolitiikkaa.

Identification of Gamma Ray Pulsar Candidates in the \emph{Fermi}-LAT 4FGL-DR4 Unassociated Sources Using Supervised Machine Learning
A. Pathania, K. K. Singh, S. K. Singh, A. Tolamatti, B. B. Singh, K. K. Yadav
https://arxiv.org/abs/2510.08654

Identification of Gamma Ray Pulsar Candidates in the \emph{Fermi}-LAT 4FGL-DR4 Unassociated Sources Using Supervised Machine Learning
The Large Area Telescope (LAT) on board the \emph{Fermi} Gamma-ray Space Telescope has been continuously providing good quality survey data of the entire sky in the high energy range from 30 MeV to 500 GeV and above since August 2008. A succession of gamma-ray source catalogs is published after a comprehensive analysis of the \emph{Fermi}--LAT data. The most recent release of data in the fourth \emph{Fermi}--LAT catalog of gamma-ray sources (4FGL-DR4), based on the first 14 years of obser…

A smooth filament origin for distant prolate galaxies seen by JWST and HST: #DarkMatter in ways never before possible.