Physics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..427..295d&link_type=abstract
Accretion and Ejection in AGN: a Global View. Proceedings of a conference held June 22-26, 2009 in Como, Italy. Edited by Laura
Physics
Scientific paper
We present optical, X-ray, high-energy (HE) and very-high energy (VHE) gamma-ray observations of the HBL blazar Mrk 421 taken between May 24-June 23 2008. A HE gamma-ray signal was detected by AGILE-GRID in June 9-15, brighter than the EGRET average flux by a factor of 1.5. In hard X-rays (20-60 keV), SuperAGILE resolved a 5-day flare with a maximum flux of ˜55 mCrab. SuperAGILE, RXTE/ASM and Swift/BAT data show a correlated flaring structure between soft and hard X-rays. Hints of the same flaring behavior is also detected in the simultaneous optical data. Swift/XRT revealed on June 12-13 the highest 2-10 keV flux ever observed (>100 mCrab). Observations at VHE (E>200 GeV) gamma-rays with MAGIC and VERITAS in the period June 6-8 show the source flux peaking in a bright state, well correlated with the simultaneous peak in the X-rays. We argue that the gamma-ray flare can be interpreted within the framework of the SSC model in terms of a rapid acceleration of leptons in the jet.
Donnarumma Immacolata
GASP-WEBT Team
Grube Jeff
MAGIC Collaboration
Raiteri Claudia M.
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