Detection of the thermal component in GRB 160107A
Abstract
We present the detection of a blackbody component in gamma-ray burst GRB 160107A emission by using the combined spectral data of the CALET Gamma-ray Burst Monitor (CGBM) and the MAXI Gas Slit Camera (GSC). MAXI/GSC detected the emission ∼45 s prior to the main burst episode observed by the CGBM. The MAXI/GSC and the CGBM spectrum of this prior emission period is fitted well by a blackbody with temperature 1.0^{+0.3}_{-0.2} keV plus a power law with a photon index of -1.6 ± 0.3. We discuss the radius of the photospheric emission and the main burst emission based on the observational properties. We stress the importance of coordinated observations via various instruments collecting high-quality data over a broad energy coverage in order to understand the GRB prompt emission mechanism.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- January 2018
- DOI:
- 10.1093/pasj/psx152
- arXiv:
- arXiv:1712.02940
- Bibcode:
- 2018PASJ...70....6K
- Keywords:
-
- gamma-ray burst: general;
- gamma-ray burst: individual (GRB 160107A);
- radiation mechanisms: non-thermal;
- radiation mechanisms: thermal;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 19 pages, 13 figures, accepted for publication in PASJ