Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-07-05
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
4 pages,4figures, Contribution to the 31st ICRC, Lodz, Poland, July 2009
Scientific paper
The HBL-type blazar Markarian 421 is one of the brightest TeV gamma-ray sources of the Northern sky. From December 2007 until June 2008 it was intensively observed in the VHE (E>100 GeV) band by the MAGIC gamma-ray telescope. The source showed intense and prolonged activity during the whole period. In some nights the integral flux rose up to 3.6 Crab units (E>200 GeV). Intra-night rapid flux variations were observed. We compared the optical (KVA) and X-ray (RXTE-ASM, Swift-XRT) data with the MAGIC VHE data, investigating the correlations between different energy bands.
Bonnoli Giacomo
for the MAGIC Collaboration
Goebel Florian
Hsu Ching-Cheng
Lindfors Elina
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