Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 60: Gamma astronomy 3
T 60.8: Vortrag
Mittwoch, 6. März 2024, 17:45–18:00, Geb. 30.22: kl. HS A
FACT - Two-Dimensional Analysis of Unidentified Gamma-Ray Sources — •Katharina Brand1 and Daniela Dorner1,2 for the FACT collaboration — 1Julius-Maximilians-Universität Würzburg, Fakultät für Physik und Astronomie, Institut für Theoretische Physik und Astrophysik, Lehrstuhl für Astronomie, Emil-Fischer-Str. 31, D-97074 Würzburg, Germany — 2ETH Zurich, Institute for Particle Physics and Astrophysics, Otto-Stern-Weg 5, 8093 Zürich, Switzerland
The First G-APD Cherenkov Telescope (FACT) focuses on monitoring a small sample of bright high-energy gamma-ray sources. Additionally, it also responds regularly to alerts from other experiments like IceCube. However the specified position often has a large uncertainty. Therefore a simple analysis on a given source position is not sufficient, but the whole field-of-view needs to be searched for an excess of gamma rays. Furthermore, not all sources are point like. If we want to see the extension of such objects, we need to analyse a larger sky region. To this end, we implemented a database-based skymap analysis technique using FACT data to search for gamma-ray sources at unknown positions. While the method is also used for other source candidates in the multi-wavelength and multi-messenger follow-up program of FACT, this work focuses on a follow-up analysis of LHAASO detected gamma-ray source J2108+5157.
Keywords: Gamma Astronomy; IACT; Analysis