ARGO-YBJ detects a VHE gamma-ray flare from Mrk501
Abstract
We report on the observation of a strong gamma-ray flare from Mrk501 at energies above 300 GeV by the ARGO-YBJ experiment, following the discovery by MAXI/GSC (ATEL #3752) of X-ray brightening starting on November 1, 2011. According to the Swift/BAT light curve at 15-50 keV, this flare started on October 17 and lasted at least until December 9. Integrating the flux from Mrk501 detected by ARGO-YBJ over the period from October 17 to November 21 (more data are still in analysis), an excess with statistical significance of 6.1 standard deviations is found.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- December 2011
- Bibcode:
- 2011ATel.3801....1B
- Keywords:
-
- TeV;
- AGN