Photometric and Spectroscopic Observations of GRB 140629A

doi:10.3847/1538-4357/aabf3d

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	Photometric and Spectroscopic Observations of GRB 140629A
	Xin,Li-Ping 1; Zhong,Shu-Qing 2; Liang,En-Wei 2; Wang,Jing 1,3; Liu,Hao 1; Zhang,Tian-Meng 4; Huang,Xiao-Li 2; Li,Hua-Li 1; Qiu,Yu-Lei 1; Han,Xu-Hui 1
刊名	The Astrophysical Journal
	2018-06-06
卷号	860 期号:1
关键词	gamma-ray burst: individual (140629A) stars: individual (GRB 140629A) techniques: photometric techniques: spectroscopic
ISSN号	0004-637X
DOI	10.3847/1538-4357/aabf3d
英文摘要	Abstract We present our optical photometric and spectroscopical observations of GRB 140629A. A redshift of z?=?2.275?±0.043 is measured through the metal absorption lines in our spectroscopic data. Using our photometric data and multiple observational data from other telescopes, we show that its optical light curve is well interpreted with the standard forward shock models in the thin shell case. Its optical–X-ray afterglow spectrum is jointly fitted with a single power-law function, yielding a photon index of ?1.90?±?0.05. The optical extinction and neutral hydrogen absorption of the gamma-ray burst (GRB) host galaxy are negligible. The fit to the light curve with the standard models shows that the ambient density is 60?±?9 cm?3 and the GRB radiating efficiency is as low as ～0.24%, likely indicating a baryonic-dominated ejecta of this GRB. This burst agrees well with the relation, but confidently violates those empirical relations involving geometric corrections (or jet break time). This gives rise to an issue of the possible selection effect on these relations since the jet opening angle of this GRB is extremely narrow (0.04 rad).
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-860-1-AABF3D
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/21681]
专题	中国科学院国家天文台
作者单位	1.CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China; xlp@nao.cas.cn 2.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People's Republic of China; lew@gxu.edu.cn 3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 19A Yuquan Rd, Shijingshan District, Beijing 100049, People's Republic of China 4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
推荐引用方式 GB/T 7714	Xin,Li-Ping,Zhong,Shu-Qing,Liang,En-Wei,et al. Photometric and Spectroscopic Observations of GRB 140629A[J]. The Astrophysical Journal,2018,860(1).
APA	Xin,Li-Ping.,Zhong,Shu-Qing.,Liang,En-Wei.,Wang,Jing.,Liu,Hao.,...&Wei,Jian-Yan.(2018).Photometric and Spectroscopic Observations of GRB 140629A.The Astrophysical Journal,860(1).
MLA	Xin,Li-Ping,et al."Photometric and Spectroscopic Observations of GRB 140629A".The Astrophysical Journal 860.1(2018).