Nature of GRBs observed by RT-2 on-board CORONAS-PHOTON satellite

D. Debnath1*, A. Nandi2, S. K. Chakrabarti1,3, T. B. Katoch1,4, and A. R. Rao4
1Indian Centre for Space Physics, Chalantika 43, Garia Station Rd., Kolkata 700084, India
2Space Astronomy Group, ISAC, HAL Airport Road, Bangalore 560017, India
3S. N. Bose National Center for Basic Sciences, JD-Block, Salt Lake, Kolkata 700098, India
4Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India

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The RT-2 Experiment, a low energy gamma-ray telescope, on-board CORONAS-PHOTON satellite is designed to study the temporal, spectral and spatial properties of the hard X-ray solar flares mainly in the energy range of 15 - 100 keV, which is extendible upto 1000 keV. During the operational period of ~9 months, it has been able to detect a few solar flares and at least four Gamma-Ray Bursts (GRBs). In this paper, we discuss the properties of the GRBs as observed by RT-2 in the energy band of 15 to ~1000 keV. We will present the results of spectral and timing properties of the GRBs (specially for the GRB 090618) using RT-2 detectors. Temporal analysis suggests that all four GRBs belong to the category of long duration bursts.

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Keywords : gamma-ray burst:general – instrumentation:detectors – supernovae: general.