TeV gamma-ray observations of Markarian 421 using TACTIC during 2009-10

被引：14

作者：

Chandra, P. ^{[1
]}

Rannot, R. C. ^{[1
]}

Yadav, K. K. ^{[1
]}

Tickoo, A. K. ^{[1
]}

Singh, K. K. ^{[1
]}

Chanchalani, K. ^{[1
]}

Kothari, M. ^{[1
]}

Agarwal, N. K. ^{[1
]}

Goyal, A. ^{[1
]}

Goyal, H. C. ^{[1
]}

Kotwal, S. ^{[1
]}

Kumar, N. ^{[1
]}

Marandi, P. ^{[1
]}

Venugopal, K. ^{[1
]}

Bhat, C. K. ^{[1
]}

Bhatt, N. ^{[1
]}

Bhattacharya, S. ^{[1
]}

Borwankar, C. ^{[1
]}

Chouhan, N. ^{[1
]}

Dhar, V. K. ^{[1
]}

Kaul, S. R. ^{[1
]}

Koul, S. K. ^{[1
]}

Koul, M. K. ^{[1
]}

Koul, R. ^{[1
]}

Mitra, A. K. ^{[1
]}

Sahayanathan, S. ^{[1
]}

Sharma, M. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Astrophys Sci Div, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2012年 / 39卷 / 04期

关键词：

BL-LAC OBJECTS; CRAB-NEBULA; MULTIWAVELENGTH OBSERVATIONS; ENERGY-SPECTRUM; IMAGING CAMERA; EMISSION; MKN-421; RADIATION; SYSTEM; FLARE;

D O I：

10.1088/0954-3899/39/4/045201

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We have observed the blazar Markarian 421 with the TACTIC gamma-ray telescope at Mt. Abu, India, from 22 November 2009 to 16 May 2010 for 265 h. Detailed analysis of the data so recorded revealed the presence of a TeV gamma-ray signal with a statistical significance of 12.12 sigma at E-gamma >= 1 TeV. We have estimated the time-averaged differential energy spectrum of the source in the energy range 1.0-16.44 TeV. The spectrum fits well with the power-law function of the form (dF/dE = f(0)E(-Gamma)) with f(0) = (1.39 +/- 0.239) x 10(-11) cm(-2) s(-1) TeV-1 and Gamma = 2.31 +/- 0.14.

引用

页数：13

共 65 条

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