Tootfinder

I will speak at Cloud Native Days Austria
topic: The archetypes of the attackers
A fun, interactive lecture on modern cyber threats, blending real-world cases with the speaker’s IT and acting experience to reveal attacker motives, tactics, and how we can defend against them.
https://talkweb.eu/openweb/4484/

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.

Impact of Low-Earth Orbit Satellites on the China Space Station Telescope Observations
Huai-Jin Tang, Xiao-Lei Meng, Hu Zhan, Xian-Min Meng, You-Hua Xu
https://arxiv.org/abs/2507.14994

Impact of Low-Earth Orbit Satellites on the China Space Station Telescope Observations
It is projected that more than 100,000 communication satellites will be deployed in Low-Earth Orbit (LEO) over the next decade. These LEO satellites (LEOsats) will be captured frequently by the survey camera onboard the China Space Station Telescope (CSST), contaminating sources in the images. As such, it is necessary to assess the impact of LEOsats on CSST survey observations. We use the images taken by the Hubble Space Telescope (HST) in its F814W band to simulate $i$-band images for the CSST…

The new architecture design of the Science Alert Generation pipeline of the Cherenkov Telescope Array Observatory
ACADA Collaboration, Luca Castaldini (INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Bologna, Italy), Andrea Bulgarelli (INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Bologna, Italy), Vincent Pollet (Univ. Savoie Mont Blanc, CNRS, Laboratoire d'Annecy de Physique des Particules - IN2P3, Annecy, France), Gabriele Panebianco …

The new architecture design of the Science Alert Generation pipeline of the Cherenkov Telescope Array Observatory
The Cherenkov Telescope Array Observatory (CTAO) represents the next-generation gamma-ray observatory and will operate for several decades. It will be particularly suited to analyse transients and variable phenomena, which will trigger real-time scientific alerts. To support this, the Science Alert Generation (SAG) pipeline within the Array Control and Data Acquisition (ACADA) system will process data from telescope arrays in real time, using dedicated pipelines for data reconstruction (SAG-REC…

Expected Constraints on the Intergalactic Magnetic Field using Gamma-Ray Bursts with the Cherenkov Telescope Array Observatory
T\'en\'eman Keita, Renaud Belmont, Thierry Stolarczyk
https://arxiv.org/abs/2509.16092

Expected Constraints on the Intergalactic Magnetic Field using Gamma-Ray Bursts with the Cherenkov Telescope Array Observatory
The InterGalactic Magnetic Field (IGMF), which could permeate the cosmic voids but was never detected so far, is considered a relic of the early Universe. Constraints on its strength $B$ can be derived from its influence on time-delayed very-high-energy photons from Gamma-Ray Bursts (GRBs) in the electromagnetic cascades along their path to the Earth. The present lower limit achieved on its intensity is $10^{-18}\;\mathrm{G}$. In this work, we simulate data from the Cherenkov Telescope Array Ob…

New Insight from the James Webb Space Telescope on Variable Active Galactic Nuclei
Bangzheng Sun, Haojing Yan, Wei Leong Tee, Feige Wang
https://arxiv.org/abs/2508.14350 https:/…

New Insight from the James Webb Space Telescope on Variable Active Galactic Nuclei
Variability detected in galaxies is usually attributed to their active galactic nuclei (AGNs). While all AGNs are intrinsically variable, the classic AGN unification model predicts that type~2 AGNs rarely vary because their engines are obstructed by dust tori. Previous UV-to-near-IR variability studies largely support this expectation. Here, we present a variability study by James Webb Space Telescope (JWST) that reveals a more subtle picture. Using NIRCam imaging data from three surveys over $…

GitHub is still #1 malware hosting platform with a take-down period of 14 days. Please be careful!
#malware

The Roman Space Telescope as a Planetary Defense Asset
Bryan J. Holler, Richard G. Cosentino, William C. Schultz, Timothy D. Brandt, Joseph R. Masiero, Benjamin N. L. Sharkey, Pedro H. Bernardinelli, Carrie E. Holt
https://arxiv.org/abs/2508.14412

The Roman Space Telescope as a Planetary Defense Asset
NASA's Nancy Grace Roman Space Telescope, slated to launch in October 2026, will serve a critical role in the characterization and threat assessment of near-Earth Objects (NEOs), thus contributing to national and international planetary defense objectives. Operating from the Earth-Sun L2 point and observing in the near-infrared, Roman has the high sensitivity and high spatial resolution needed to measure the physical properties, compositions, and orbital trajectories of NEOs in order to underst…

The optical calibration system for the CTAO North Large Sized Telescope
M. Iori, L. Recchia, F. Ferrarotto, A. Girardi, R. Lunadei
https://arxiv.org/abs/2509.15586 https://

The optical calibration system for the CTAO North Large Sized Telescope
In 2018, the first prototype of the optical calibration system was installed in the Large Sized Telescopes, LST-1 at the Observatorio del Roque de los Muchachos, ORM, in La Palma, Canary Islands. We have almost completed the construction of the three remaining ones that will be mounted by 2026 on LST-2-3-4. The main feature of this system is to ensure a stable and constant photon flux over time with the characteristics of a signal produced by Cherenkov light when a high-energy gamma ray crosses…

Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside
N. Mahesh, J. D. Bowman, J. O. Burns, S. D. Bale, T-C. Chang, S. Furlanetto, G. Hallinan, A. Hegedus, J. Mirocha, J. Pober, R. Polidan, D. Rapetti, N. Thyagarajan, J. Turner
https://arxiv.org/abs/2508.14126

Identifying Habitable Exoplanets with Radio Telescopes on the Lunar Farside
The search for habitable conditions beyond Earth is a top priority in astrophysics. The discovery of habitable exoplanets beyond our solar system will require a suite of instruments providing long-term monitoring for detection (e.g. with space and ground-based radial velocity observations), spectroscopic characterization of atmospheric and surface properties, and eventually deep chronograph-aided observations from e.g. JWST, Roman Space Telescope, and the Habitable Worlds Observatory (HWO). Det…