Detection of TeV gamma-rays from the AGN Markarian 421
19925 pages
Part of Proceedings, 7th International Symposium on Very High Energy Cosmic Ray Interactions (ISVHECRI 1992) : Ann Arbor, Michigan, June 21-27, 1992, 185-189
Published in:
- AIP Conf.Proc. 276 (2008) 185-189
Contribution to:
- , 185-189
- ISVHECRI 1992
- Published: May 29, 2008
DOI:
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Abstract: (AIP)
We present here the detection of TeV gamma rays from the extragalactic source Markarian 421. Observations obtained with the Whipple 10 m imaging Cherenkov telescope in March–June 1992 give a gamma ray signal with statistical significance of 6.3σ above background. The excess corresponds to an average flux of 1.5×10−11 cm−2 s−1 above 0.5 TeV, equivalent to 0.3 of that from the Crab Nebula. The estimated location of the source agrees with the position of Mrk 421 to the angular uncertainty of the Whipple instrument (6 arc minutes).- Cosmic gamma ray sources
- Gamma rays
- Active galaxies
- Gamma ray imaging
- Gamma ray telescopes
- talk: Ann Arbor 1992/06/21
- photon: cosmic radiation
- cosmic radiation: particle source
- blazar
- galaxy: AGN
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