Daily search for emission of ultra-high-energy radiation from point sources
| Autor: | D. E. Alexandreas, G. Allen, D. Berley, S. Biller, R. L. Burman, D. R. Cady, M. Cavalli-Sforza, C. Y. Chang, D. Coyne, C. Dion, G. M. Dion, D. Dorfan, R. W. Ellsworth, S. J. Freedman, B. K. Fujikawa, J. A. Goodman, T. J. Haines, C. M. Hoffman, L. Kelley, S. Klein, D. A. Krakauer, P. W. Kwok, X.-Q. Lu, D. E. Nagle, M. Potter, V. D. Sandberg, C. Sinnis, A. Shoup, M. J. Stark, P. R. Vishwanath, D. D. Weeks, D. A. Williams, J.-P. Wu, G. B. Yodh, W. Zhang, null The CYGNUS Collaboration |
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| Rok vydání: | 1993 |
| Předmět: |
Physics
Point source Astrophysics::High Energy Astrophysical Phenomena Astrophysics::Instrumentation and Methods for Astrophysics Cataclysmic variable star Astronomy Astronomy and Astrophysics Cosmic ray Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Gamma-ray astronomy Galaxy Air shower Crab Nebula Pulsar Space and Planetary Science |
| Zdroj: | The Astrophysical Journal. 405:353 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1086/172367 |
| Popis: | A daily search for emission of ultra-high-energy radiation from astrophysical point sources using the CYGNUS extensive air shower array is described. The data set spans the period from 1986 April 4 to 1992 June 22. Fifty-one astrophysical objects have been examined, including Cyg X-3, Her X-1, the Crab, a number of gamma-ray and X-ray sources from the COS B and the fourth Uhuru catalogs, and several cataclysmic variables, nearby galaxies, and radio pulsars. The observed daily number of events from the source directions are consistent with expected statistical fluctuations of the number of events from backgrounds cosmic rays |
| Databáze: | OpenAIRE |
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