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T: Fachverband Teilchenphysik
T 83: Gamma-Astronomie 2
T 83.9: Talk
Tuesday, March 10, 2009, 18:50–19:05, M218
MAGIC observations of the distant quasar 3c279 in 2006 and 2007 — •Karsten Berger1, Pratik Majumdar2, Elina Lindfors3, Elisa Prandini4, Manel Erando5, and Masahiro Teshima6 — 1University Lodz, Lodz, Poland — 2Deutsches Elektronen-Synchrotron (DESY) Zeuthen, Germany — 3Tuorla Observatory, Piikiö, Finland — 4Dipartimento di Fisica, Università di Padova and INFN sez. di Padova, Italy — 5Institut de Física d'Altes Energies, Barcelona, Spain — 6Max-Planck-Institut für Physik, Munich, Germany
The flat-spectrum radio-quasar 3c279 (z=0.536) is the most distant object detected at Very High Energy (VHE) gamma-rays. It is thus an important beacon for the study of the interaction of the VHE gamma-rays with the Extra-galactic Background Light (EBL). Previous observations by EGRET showed a highly variable flux that can differ up to a factor of 100. In this talk first results from a new observation campaign during an optical flare in January 2007 will be presented and previous results from the 2006 observation campaign will be summarized.