20 Years of Indian Gamma Ray Astronomy Using Imaging Cherenkov Telescopes and Road Ahead

被引:14
作者
Singh, Krishna Kumar [1 ]
Yadav, Kuldeep Kumar [1 ,2 ]
机构
[1] Bhabha Atom Res Ctr, Astrophys Sci Div, Mumbai 400085, Maharashtra, India
[2] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India
关键词
gamma ray astronomy; imaging atmospheric Cherenkov technique; TeV gamma-rays; non-thermal radiation; LARGE-AREA TELESCOPE; MRK; 421; CRAB-NEBULA; CONTROL-SYSTEM; X-RAY; TEV; MULTIWAVELENGTH; EMISSION; PULSAR; FERMI;
D O I
10.3390/universe7040096
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The field of ground-based gamma-ray astronomy has made very significant advances over the last three decades with the extremely successful operations of several atmospheric Cherenkov telescopes worldwide. The advent of the imaging Cherenkov technique for indirect detection of cosmic gamma rays has immensely contributed to this field with the discovery of more than 220 gamma-ray sources in the Universe. This has greatly improved our understanding of the various astrophysical processes involved in the non-thermal emission at energies above 100 GeV. In this paper, we summarize the important results achieved by the Indian gamma-ray astronomers from the GeV-TeV observations using imaging Cherenkov telescopes over the last two decades. We mainly emphasize the results obtained from the observations of active galactic nuclei with the TACTIC (TeV Atmospheric Cherenkov Telescope with Imaging Camera) telescope, which has been operational since 1997 at Mount Abu, India. We also discuss the future plans of the Indian gamma-ray astronomy program with special focus on the scientific objectives of the recently installed 21 m diameter MACE (Major Atmospheric Cherenkov Experiment) telescope at Hanle, India.
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页数:22
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