Cosmic gamma rays from extragalactic objects

作者: E C M Young , K N Yu

DOI: 10.1088/0305-4616/14/5/009

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摘要: The authors have analysed the database of cosmic gamma rays above 100 MeV from SAS-2 satellite to search for -ray fluxes extragalactic active galactic nuclei (AGN). correlation function method devised by COS-B group sources has been used. They thus identified 15 AGN, including 11 quasars, 3 BL Lac objects and 1 radiogalaxy. further investigated relationship between their in different energy regions (>100 35-100 MeV) red shifts, they also derived spectral indices. results give support claim that detected are genuine objects.

参考文章(15)
A. J. Dean, L. Bassani, Gamma-ray observations and relativistic jets in active galactic nuclei Astronomy and Astrophysics. ,vol. 161, pp. 85- 88 ,(1986)
D. J. Thompson, C. E. Fichtel, Extragalactic gamma radiation: Use of galaxy counts as a galactic tracer Astronomy and Astrophysics. ,vol. 109, pp. 352- 354 ,(1982)
A. W. Strong, G. F. Bignami, Gamma-ray observations toward NGC 1275 and the origin of the emission in the infrared, X-rays, and gamma-rays The Astrophysical Journal. ,vol. 274, pp. 549- 557 ,(1983) , 10.1086/161469
D. A. Schwartz, W. H.-M. Ku, Studies of BL Lacertae objects with the Einstein X-ray observatory - The absolute volume density The Astrophysical Journal. ,vol. 266, pp. 459- 465 ,(1983) , 10.1086/160793
A. Hewitt, G. Burbidge, A new optical catalog of quasi-stellar objects Astrophysical Journal Supplement Series. ,vol. 63, pp. 1- 246 ,(1977) , 10.1086/191163
B. N. SWANENBURG, K. BENNETT, G. F. BIGNAMI, P. CARAVEO, W. HERMSEN, G. KANBACH, J. L. MASNOU, H. A. MAYER-HASSELWANDER, J. A. PAUL, B. SACCO, L. SCARSI, R. D. WILLS, COS B observation of high-energy γ radiation from 3C273 Nature. ,vol. 275, pp. 298- 298 ,(1978) , 10.1038/275298A0
Maarten Schmidt, Space Distribution and Luminosity Functions of Quasi-Stellar Radio Sources The Astrophysical Journal. ,vol. 151, pp. 393- ,(1968) , 10.1086/149446