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MUTI-WAVELENGTH OBSERVATIONS OF GRB 111228A AND IMPLICATIONS FOR THE FIREBALL AND ITS ENVIRONMENT
Xin, Li-Ping1,2,3; Wang, Yuan-Zhu2,3; Lin, Ting-Ting2,3; Liang, En-Wei2,3; Lu, Hou-Jun2,3; Zhong, Shu-Qing2,3; Urata, Yuji4,5; Zhao XH(赵晓红)6,7; Wu, Chao1; Wei, Jian-Yan1; Huang, Kui-Yun8; Qiu, Yu-Lei1; Deng, Jin-Song1; Xin, LP (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100864, Peoples R China
发表期刊ASTROPHYSICAL JOURNAL
2016-02-01
卷号817期号:2
DOI10.3847/0004-637X/817/2/152
产权排序第6完成单位
收录类别SCI
关键词Gamma-ray Burst: Individual (Grb. 130702a Grb 111228a)
摘要Observations of very early multi-wavelength afterglows are critical to reveal the properties of the radiating fireball and its environment as well as the central engine of gamma-ray bursts (GRBs). We report our optical observations of GRB 111228A from 95 s to about 50 hr after the burst trigger and investigate its properties of the prompt gamma-rays and the ambient medium using our data and the data from the Swift and Fermi missions. Our joint optical and X-ray spectral fits to the afterglow data show that the ambient medium features a low dust-to-gas ratio. Incorporating the energy injection effect, our best fit to the afterglow light curves with the standard afterglow model via the Markov Chain Monte Carlo technique shows that epsilon(e) (6.9 +/- 0.3) 10(-2), epsilon(B) = (7.73 +/- 0.62) 10(-6), E-K = (6.32 +/- 0.86) 10(-6) erg, n = 0.100 +/- 0.014 cm(-3). The low medium density likely implies that the afterglow jet may be in a halo or in a hot ISM. A chromatic shallow decay segment observed in the optical and X-ray bands is well explained with the long-lasting energy injection from the central engine, which would be a magnetar with a period of about 1.92 ms inferred from the data. The E-p of its time-integrated prompt gamma-ray spectrum is similar to 26 KeV. Using the initial Lorentz factor (Gamma(0) = 476(237)(+)(225)) derived from our afterglow model fit, it is found that GRB 111228A satisfies the L-iso - E-p,E-z - Gamma(0) relation and bridges the typical GRBs and low luminosity GRBs in this relation.
项目资助者National Basic Research Program of China (973 Program)(2014CB845800) ; National Natural Science Foundation of China (11533003, 11103036, U1331202, U1231115, U1331101) ; Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences(XDB09000000) ; Guangxi Science Foundation(2013GXNSFFA019001) ; Telescope Access Program (TAP) - National Astronomical Observatories ; Special Fund for Astronomy from the Ministry of Finance ; CAS
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000369437900069
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]GAMMA-RAY-BURST ; SWIFT XRT DATA ; HOST GALAXIES ; LIGHT CURVES ; COMPREHENSIVE ANALYSIS ; MILLISECOND PULSARS ; INTERSTELLAR-MEDIUM ; SPECTRAL EVOLUTION ; ENERGY INJECTION ; AFTERGLOW ONSET
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9332
专题丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
通讯作者Xin, LP (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100864, Peoples R China
作者单位1.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, China
2.GXU-NAOC Center for Astrophysics and Space Sciences, Department of Physics, Guangxi University, Nanning 530004, China
3.Guangxi Key Laboratory for the Relativistic Astrophysics, Nanning 530004, China
4.Institute of Astronomy, National Central University, Chung-Li 32054, Taiwan
5.Academia Sinica Institute of Astronomy and Astrophysics, Taipei 106, Taiwan
6.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
7.Key Laboratory for the Structure and Evolution of Celestial Bodies, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
8.Department of Mathematics and Science, National Taiwan Normal University, Lin-kou District, New Taipei City 24449, Taiwan
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Xin, Li-Ping,Wang, Yuan-Zhu,Lin, Ting-Ting,et al. MUTI-WAVELENGTH OBSERVATIONS OF GRB 111228A AND IMPLICATIONS FOR THE FIREBALL AND ITS ENVIRONMENT[J]. ASTROPHYSICAL JOURNAL,2016,817(2).
APA Xin, Li-Ping.,Wang, Yuan-Zhu.,Lin, Ting-Ting.,Liang, En-Wei.,Lu, Hou-Jun.,...&Xin, LP .(2016).MUTI-WAVELENGTH OBSERVATIONS OF GRB 111228A AND IMPLICATIONS FOR THE FIREBALL AND ITS ENVIRONMENT.ASTROPHYSICAL JOURNAL,817(2).
MLA Xin, Li-Ping,et al."MUTI-WAVELENGTH OBSERVATIONS OF GRB 111228A AND IMPLICATIONS FOR THE FIREBALL AND ITS ENVIRONMENT".ASTROPHYSICAL JOURNAL 817.2(2016).
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