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T: Fachverband Teilchenphysik

T 91: Gammaastronomie 3

T 91.4: Vortrag

Mittwoch, 29. Februar 2012, 17:30–17:45, ZHG 008

Multi-Wavelength Observations of Mrk 180 and 1ES 2344+514 — •Stefan Rügamer¹, Emmanouil Angelakis², Denis Bastieri³, Daniela Dorner⁴, Lars Fuhrmann², Yu. Kovalev⁵, Yuri Kovalev^2,5, Anne Lähteenmäki⁶, Elina Lindfors⁷, Francesco Longo⁸, Riho Reinthal⁷, Joseph Richards⁹, and Antonio Stamerra¹⁰ — ¹Universität Würzburg, Germany — ²MPIfR, Bonn, Germany — ³Universita di Padova and INFN, Italy — ⁴ISDC, Versoix, Switzerland — ⁵Astro Space Center of Lebedev Physical Institute, Moscow, Russia — ⁶Aalto University Metsähovi Radio Observatory, Kylmälä, Finland — ⁷Tuorla Observatory, University of Turku, Piikkiö, Finland — ⁸Universita di Trieste, and INFN Trieste, Italy — ⁹Purdue University, West Lafayette, USA — ¹⁰Universita di Siena, and INFN Pisa, Italy

The high-frequency peaked BL Lac objects and Very High Energy gamma-ray emitters Mrk 180 and 1ES 2344+514 were the targets of extensive simultaneous multi-wavelength observations in 2008. The campaigns, ranging from the radio up to the TeV regime, represent the first of their kind on these objects. Significant variability has been detected at X-rays for both sources. Especially intriguing was the detection of an unprecedentedly strong flare of Mrk 180, which was accompanied by significant spectral variability, making this source another 'extreme blazar' candidate. 1ES 2344+514 was observed in one of the lowest flux states ever at several wavelengths. This contribution will discuss the observation campaigns, multi-wavelength light curves and spectral energy distributions of the two sources.