%0 Generic
%A Hauser, Marcus
%D 2011
%F heidok:12238
%K Datenreduktionspipeline , AGN Lichtkurve , ATOM , High Energy Stereoscopic System , H.E.S.S.data analysis pipeline , AGN lightcurve ,  ATOM , High Energy Stereoscopic System , H.E.S.S.
%R 10.11588/heidok.00012238
%T The Automatic Telescope for Optical Monitoring
%U https://archiv.ub.uni-heidelberg.de/volltextserver/12238/
%X This thesis is presenting the development and commissioning phase as well as results from the first years of operation of ATOM, the Automatic Telescope for Optical Monitoring. It is now one of the worldwide first operational telescope systems that is performing observing runs in a completely automatic way whilst being able to respond to changing weather conditions without any human interaction. The basis for this system is the 75 cm telescope of Landessternwarte Heidelberg. It was upgraded and relocated to Namibia to be part of the H.E.S.S. experiment. ATOM is now monitoring potential or detected TeV emitting extragalactic sources (Active Galactic Nuclei, AGN) for H.E.S.S. in the optical spectral range to create long-term lightcurves and sent alerts in case a source is entering a flaring state. For that purpose, a complete new data reduction pipeline was developed. This pipeline is analysing the images recorded by ATOM and is producing flux calibrated lightcurves in an automatic way. All TeV-detected AGN, which are observable from Namibia, have been studied for flux and color changes (as well as some other AGN). For some sources, potential correlations between ATOM observations and measurements in the GeV energy range performed by the Fermi satellite have been investigated. Furthermore, this work is providing the framework for an increasing photometric catalog consisting of more than 200 AGN.