Multi-TeV gamma-ray observation of several strong outbursts of Mrk 421 during 2000 and 2001 with the Tibet-III air-shower array
Abstract
Several strong TeV gamma-ray bursts were detected from Markarian 421 (Mrk 421) in the years 2000 and 2001 by the Tibet-III air-shower array at the statistical significance of 6.9 σ level. Mrk 421 was unprecedentedly active at X-ray and TeV gamma-ray energies during this period. The observed differential energy spectral index of the gamma-rays from Mrk 421 is 3.65±0.50 0.55 at energies from 2.6 TeV to 39 TeV, assuming a power law spectrum.
- Publication:
-
International Cosmic Ray Conference
- Pub Date:
- August 2001
- Bibcode:
- 2001ICRC....7.2661A