Observations of the gamma-ray flux from the galaxy Mk 501

被引：9

作者：

Andreeva, NA ^{[1
]}

Zyskin, YL ^{[1
]}

Kalekin, OR ^{[1
]}

Neshpor, YI ^{[1
]}

Stepanyan, AA ^{[1
]}

Fomin, VP ^{[1
]}

Chalenko, NN ^{[1
]}

Shitov, VG ^{[1
]}

机构：

[1] Crimean Astrophys Observ, UA-334413 Nauchnyi, Crimea, Ukraine

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2000年 / 26卷 / 04期

关键词：

active galactic nuclei; gamma-ray observations; quasars and radio galaxies;

D O I：

10.1134/1.20382

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present two-year-long observations of the flux of very-high-energy (similar to 10(12) eV) gamma rays from the active galactic nucleus Mk 501 performed with a Cherenkov detector at the Crimean Astrophysical Observatory. A gamma-ray flux from the object was shown to exist at confidence levels of 11 and 7 standard deviations for 1997 and 1998, respectively. The flux varied over a wide range. The mean flux at energies >10(12) eV, as inferred from the 1997 and 1998 data, is (5.0 +/- 0.6) x 10(-11) and (3.7 +/- 0.6) x 10(-11) cm(-2) s(-1), respectively. The errors are the sum of statistical observational and modeling errors. The mean power released in the form of gamma rays is similar to 2 x 10(43) erg s(-1) sr(-1). (C) 2000 MAIK "Nauka/Interperiodica ".

引用

页码：199 / 203

页数：5

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