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T: Fachverband Teilchenphysik
T 72: Gammaastronomie I
T 72.4: Talk
Monday, March 3, 2008, 17:30–17:45, KGII-HS 2006
Wide Range Multifrequency Observations of Northern TeV Blazars — •Stefan Rügamer1, Masaaki Hayashida2, Dieter Horns3, Luigi Costamante4, and Tadayuki Takahashi5 for the MAGIC collaboration — 1Institut für Theoretische Physik und Astrophysik, Universität Würzburg — 2Max-Planck-Institut für Physik, München — 3Institut für Astronomie und Astrophysik, Universität Tübingen — 4Max-Planck-Institut für Kernphysik, Heidelberg — 5Institute of Space and Astronautical Science, Kanagawa, Japan
Blazars are radio-loud active galactic nuclei (AGN) with a relativistic jet closely aligned to the line of sight. HBLs, a subclass of blazars, are characterized by an SED peaking in the UV to X-ray and VHE range.
Despite extensive observational efforts the knowledge on HBLs is rather limited. This is mainly due to the high flux variability spanning from minutes to month as well as an SED ranging from radio to TeV energies, making thorough investigations of the emission mechanisms only possible by simultaneous multifrequency campaigns (MFKs).
Former MFKs were suffering from the low sensitivity of the VHE instruments which rendered only detections in high flux states possible. With the advent of the next generation of gamma telescopes, such as MAGIC and H.E.S.S., detections also in low or quiescent flux states as well as the localization of the VHE peak become feasible.
We present the results of simultaneous observations in the optical (KVA), X-ray (Suzaku) as well as VHE range (MAGIC, H.E.S.S.) conducted in 2006 for Mrk421, Mrk501, 1ES1218+304 and 1ES1426+428.