Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21532405k&link_type=abstract
American Astronomical Society, AAS Meeting #215, #324.05; Bulletin of the American Astronomical Society, Vol. 42, p.420
Astronomy and Astrophysics
Astronomy
Scientific paper
VERITAS is the high sensitivity instrument of latest generation. It is often used for the short (less than 1 hr) AGN monitoring exposures evenly distributed over entire observational season of a source of interest. Each of these exposures is long enough to detect a source at the flux level of about 1 Crab. During 2008-2009 observing season a number of exposures of Mrk 501 with VERITAS revealed variable TeV gamma-ray emission at the level of about 1-2 Crab. Observed TeV emission has never overcome substantially the 2 Crab flux level. A short summary of recent VERITAS results on the Mkn 501 detection, light curve, average low-state and high-state energy spectra will be given at the symposium. Mrk 501 has been detected with Fermi during the first year of its operation. Contemporary VERITAS and Fermi data samples of Mrk 501 permit detailed spectral measurements. The combined Fermi/VERITAS spectral energy distribution of Mrk 501 along with the spectral models will be presented at the symposium.
Konopelko Alexander
VERITAS Collaboration
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