Multi-TeV gamma-ray flares from Markarian 421 in 2000 and 2001 observed with the Tibet Air Shower Array - INSPIRE

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Multi-TeV gamma-ray flares from Markarian 421 in 2000 and 2001 observed with the Tibet Air Shower Array

Tibet AS Gamma

Collaboration

•

M. Amenomori
(
- Hirosaki U.
)

2003

8 pages

Published in:

Astrophys.J. 598 (2003) 242-249

e-Print:

astro-ph/0304241 [astro-ph]

DOI:

10.1086/378350

Experiments:

TIBET-ASG

View in:

ADS Abstract Service

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Abstract: (IOP)

Several strong TeV γ-ray flares were detected from Mrk 421 in the years 2000 and 2001 by the Tibet III air shower array at a level of statistical significance of 5.1 σ. Mrk 421 was unprecedentedly active at X-ray and TeV γ-ray energies during this period, and a positive correlation was found between the change of the all-sky monitorRossi X-Ray Timing ExplorerX-ray flux and the Tibet TeV γ-ray flux. When a power-law energy spectrum for γ-rays from this source is assumed, the spectral index is calculated to be -3.24 ± 0.69 at the most active phase in 2001. The spectral index observed by the Tibet air shower array is consistent with those obtained via imaging air Cerenkov telescopes.

Note:

Submitted to Astrophys.J.

BL LAC OBJECTS
GAMMA-RAY OBSERVATIONS
photon: cosmic radiation
showers: air
cosmic radiation: flux
correlation
cosmic radiation: particle source
cosmic radiation: energy spectrum
cosmic radiation: time dependence
blazar

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Figures(0)

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