Detection of GRB 090618 with RT-2 Experiment Onboard the Coronas-Photon Satellite

Abstract

We present the results of an analysis of the prompt gamma-ray emission from GRB 090618 using the RT-2 Experiment onboard the Coronas-Photon satellite. GRB 090618 shows multiple peaks and a detailed study of the temporal structure as a function of energy is carried out. As the GRB was incident at an angle of 77 degree to the detector axis, we have generated appropriate response functions of the detectors to derive the spectrum of this GRB. We have augmented these results using the publicly available data from the Swift BAT detector and show that a combined spectral analysis can measure the spectral parameters quite accurately. We also attempt a spectral and timing analysis of individual peaks and find evidence for a systematic change in the pulse emission characteristics for the successive pulses. In particular, we find that the peak energy of the spectrum, E_p, is found to monotonically decrease with time, for the successive pulses of this GRB.

arXiv comment12 pages, 6 figures, 3 tables, Accepted for publication in The Astrophysical Journal

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Cited by in corpus (7)

• A Radio-Selected Sample of Gamma Ray Burst Afterglows
• A double component in GRB 090618: a proto-black hole and a genuinely long GRB
• Time-resolved Spectral Study Of Fermi GRBs Having Single Pulses
• Instruments of RT-2 Experiment onboard CORONAS-PHOTON and their test and evaluation IV: Background Simulations using GEANT-4 Toolkit
• A new method of pulse-wise spectral analysis of Gamma-ray Bursts
• Discovery of Smoothly Evolving Blackbodies in the Early Afterglow of GRB 090618 : Evidence for a Spine-Sheath Jet?
• Measuring the pulse of GRB 090618: A Simultaneous Spectral and Timing Analysis of the Prompt Emission