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T: Fachverband Teilchenphysik
T 92: Gammaastronomie 4
T 92.8: Talk
Thursday, March 1, 2012, 18:30–18:45, ZHG 008
Observations of W51 with the MAGIC Telescopes — •Julian Krause1, Ignasi Reichardt2, and Emiliano Carmona3 — 1Max-Planck-Institut für Physik, D-80805 München, Germany — 2IFAE, Edifici Cn., Campus UAB, E-08193 Bellaterra, Spain — 3Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (CIEMAT), Madrid, Spain
W51 located at the Sagitarius arm of the milky way at a distance of 5.5 kpc is a well-known star-forming region hosting both a supernova remnant molecular cloud association and a possible pulsar wind nebula. High energy gamma-ray emission was reported from Fermi/LAT as well as very high energy gamma-ray emission was detected by the H.E.S.S. collaboration. Previous measurements could not reveal the spatial origin of the extended emission. The spectrum obtained by Fermi/LAT however suggests a hadronic origin of the emission. The VHE observations presented here, obtained with MAGIC stereo system, allow us to pinpoint the VHE gamma-ray emission to the interaction region between the remnant and the molecular cloud. The MAGIC data also allow us to measure, for the first time, the VHE emission spectrum of W51 from the highest Fermi/LAT energies up to several TeV.