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Type: Journal article
Title: Observation of 7 TeV gamma rays from the Crab using the large zenith angle air Čerenkov imaging technique
Other Titles: Observation of 7 TeV gamma rays from the Crab using the large zenith angle air Cerenkov imaging technique
Author: Tanimori, T.
Tsukagoshi, T.
Kifune, T.
Edwards, P.G.
Fujimoto, M.
Hara, T.
Hayashida, N.
Matsubara, Y.
Mizumoto, Y.
Muraki, Y.
Ogio, S.
Patterson, J.
Roberts, M.D.
Rowell, G.
Suda, T.
Tamura, T.
Teshima, M.
Thornton, G.J.
Watase, Y.
Yoshikoshi, T.
Citation: The Astrophysical Journal: an international review of astronomy and astronomical physics, 1994; 429(2 Pt 2):L61-L64
Publisher: American Astronomical Society
Issue Date: 1994
ISSN: 0004-637X
Statement of
T. Tanimori, T. Tsukagoshi, T. Kifune, P. G. Edwards, M. Fujimoto, T. Hara, N. Hayashida, Y. Matsubara, Y. Mizumoto, Y. Muraki, S. Ogio, J. R. Patterson, M. D. Roberts, G. Rowell, T. Suda, T. Tamura, M. Teshima, G. J. Thornton, Y. Watase and T. Yoshikoshi
Abstract: We have observed the Crab pulsar/nebula from 1992 December to 1993 January to search for very high energy gamma rays, using an imaging air Cerenkov telescope of 3.8 m diameter, located at Woomera, Australia. Since the observation was carried out in the southern hemisphere, the zenith angle of the object is large, which results in a maximum sensitivity of approximately 10-13/cm2/sec with approximately 7 TeV threshold energy for detected gamma rays. With high angular resolution, the Cerenkov imaging technique is found to be useful at zenith angles 53 to 56 deg. We report here possible evidence of detection with 4 sigma significance of very high energy gamma-rays above approximately 7 TeV from the Crab pulsar/nebula. The integral flux is estimated to be (7.6 plus or minus 1.9) x 10-13/cm2/sec. The result is consistent with the revised spectrum of the Crab recently reported by the Whipple group (Lewis et al. 1993).
Keywords: Gamma rays: observations; pulsars: individual (Crab Nebula, Crab Pulsar); supernova remnants
Rights: © 1994, The American Astronomical Society. All rights reserved.
DOI: 10.1086/187413
Appears in Collections:Aurora harvest 2
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