Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 61: Gamma Astronomy I

T 61.6: Vortrag

Mittwoch, 18. März 2026, 17:30–17:45, KS 00.005

Determining Telescope Pointing Direction Using Stellar Projections — •Daniel Cecchin Momesso and Christopher van Eldik — Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Nikolaus-Fiebiger-Str. 2, 91058 Erlangen, Germany

This work presents a data-driven approach to improve the pointing accuracy of Imaging Atmospheric Cherenkov Telescopes (IACTs), such as those in the H.E.S.S. array. These telescopes detect Cherenkov light from gamma-ray-induced atmospheric showers, but are also sensitive to diffuse and stellar background light. This Night Sky Background (NSB) contains spatial information associated with the distribution of bright stars in the field of view. Based on stellar positions provided by catalogs, their projections onto the camera coordinates are compared with features observed in the NSB maps. This correspondence is the basis for correcting the pointing direction of the telescope and will be compared to the results of standard calibration methods.

Keywords: telescope pointing calibration; night sky background; stellar projections; methods: data analysis