The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 43 Issue 1
- /
- Pages.59.1-59.1
- /
- 2018
- /
- 1226-2692(pISSN)
The optical afterglow of GRB 180205A
- Paek, Gregory SungHak (Center of the Exploration of the Origin of the Universe, Astronomy Program, Department of Physics & Astronomy, Seoul National Univsersity) ;
- Im, Myungshin (Center of the Exploration of the Origin of the Universe, Astronomy Program, Department of Physics & Astronomy, Seoul National Univsersity) ;
- Choi, Changsu (Center of the Exploration of the Origin of the Universe, Astronomy Program, Department of Physics & Astronomy, Seoul National Univsersity)
- Published : 2018.05.08
Abstract
On 2018 February 5 a gamma ray burst with trigger time 04:25:29.3 UT was detected by Swift BAT and this event was named GRB 180205A. We observed the optical afterglow of GRB 180205A starting from about 1 hour after the burst until February 22 in the optical bands with the 1m telescope of Deokheung Optical Astronomy Observatory (DOAO), the 1m telescope at Mt. Lemmon Optical Astronomy Observatory(LOAO) and the 0.8m and 0.25m telescopes at McDonald Observatory. According to the fireball model, which is a well-accepted and conventional model for the afterglow of the GRB, the mechanism of the afterglow is that the expanding external blast wave of the GRB successively collides with the ambient medium and loses its energy, and as a result emits radiation at wavelengths longer than gamma rays. Here we present optical photometry and light curve of the afterglow in the R band and analyze it to characterize GRB 180205A.
Keywords