Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-11
AIP Conf.Proc.921:153-156,2007
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures, manuscript submitted on behalf of the MAGIC collaboration to the First GLAST Symposium (oral presentation)
Scientific paper
10.1063/1.2757290
The blazar Markarian 501 (Mrk 501) was observed above 100 GeV with the MAGIC Telescope during May, June and July 2005. The high sensitivity of the instrument made possible the detection of the source with high significance in each of the observing nights. During this observational campaign, the emitted gamma-ray flux from Mkn 501 was found to vary by one order of magnitude, and showed a high correlation with spectral changes. Intra-night flux variability was also observed, with flux-doubling times of ~2 minutes. The data showed a clear evidence of a spectral peak (in the nuFnu representation) during the nights when the gamma-ray activity was highest. The location of this spectral feature was found to be correlated with the emitted gamma-ray flux. In these proceedings we discuss some of the results of this unprecedented spectral and temporal analysis of Mrk 501 observations in the very high energy range.
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