Hamburg 2016 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 80: Gammaastronomie IV

T 80.9: Vortrag

Mittwoch, 2. März 2016, 18:50–19:05, VMP9 SR 27

A spatial likelihood analysis for MAGIC skymaps — •Marcel Strzys, Ievgen Vovk, and Christian Fruck for the MAGIC collaboration — Max-Planck-Institut für Physik, München, Deutschland

Due to the constant improvement of the sensitivity of Cherenkov telescopes the detection of ever weaker signals becomes possible resulting in much more details in the morphologies of the observed sources. The task of flux extraction from different subregions of the observed source is challenging with the traditional approach employing the “aperture photometry” technique. We therefore developed a new analysis tool for MAGIC that allows the user to simultaneously fit several sources, similar to what is common practice in space gamma-ray observatories such as EGRET and Fermi-LAT. The method incorporates an user-defined composite source model, the background from hadronic events, and a full Monte-Carlo based modelling of the instrument response functions. A model of the source as seen by the telescopes is constructed and fitted to the data. In this way arbitrarily complex morphological models can be tested for their significance and the spectrum of several subcomponents can be extracted self-consistently. We are going to present the method and its applicability to gamma-ray observations using data from the MAGIC telescopes.