PANCHROMATIC OBSERVATIONS OF THE TEXTBOOK GRB 110205A: CONSTRAINING PHYSICAL MECHANISMS OF PROMPT EMISSION AND AFTERGLOW
文献类型：期刊论文
| 作者 | Zheng, W.1; Shen, R. F.2; Sakamoto, T.3,4; Beardmore, A. P.5; De Pasquale, M.6; Wu, X. F.7,8; Gorosabel, J.9; Urata, Y.10; Sugita, S.11; Zhang, B.7 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2012-06-01 |
| 卷号 | 751期号:2页码:90(21pp) |
| 关键词 | gamma-ray burst: individual (GRB 110205A) |
| ISSN号 | 0004-637X |
| 英文摘要 | We present a comprehensive analysis of a bright, long-duration (T-90 similar to 257 s) GRB 110205A at redshift z = 2.22. The optical prompt emission was detected by Swift/UVOT, ROTSE-IIIb, and BOOTES telescopes when the gamma-ray burst (GRB) was still radiating in the gamma-ray band, with optical light curve showing correlation with gamma-ray data. Nearly 200 s of observations were obtained simultaneously from optical, X-ray, to gamma-ray (1 eV to 5 MeV), which makes it one of the exceptional cases to study the broadband spectral energy distribution during the prompt emission phase. In particular, we clearly identify, for the first time, an interesting two-break energy spectrum, roughly consistent with the standard synchrotron emission model in the fast cooling regime. Shortly after prompt emission (similar to 1100 s), a bright (R = 14.0) optical emission hump with very steep rise (alpha similar to 5.5) was observed, which we interpret as the reverse shock (RS) emission. It is the first time that the rising phase of an RS component has been closely observed. The full optical and X-ray afterglow light curves can be interpreted within the standard reverse shock (RS) + forward shock (FS) model. In general, the high-quality prompt and afterglow data allow us to apply the standard fireball model to extract valuable information, including the radiation mechanism (synchrotron), radius of prompt emission (R-GRB similar to 3 x 10(13) cm), initial Lorentz factor of the outflow (Gamma(0) similar to 250), the composition of the ejecta (mildly magnetized), the collimation angle, and the total energy budget. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY BURST ; INITIAL LORENTZ FACTOR ; INTERNAL-SHOCK MODEL ; X-RAY ; LIGHT CURVES ; OPTICAL-EMISSION ; MAGNETIC-FIELDS ; REVERSE SHOCK ; RELATIVISTIC SHOCK ; DENSITY-JUMP |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000304204600011 |
| 公开日期 | 2013-01-31 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/7955]  |
| 专题 | 紫金山天文台_毫米波和亚毫米波技术实验室 |
| 作者单位 | 1.Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA 2.Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada 3.NASA, Goddard Space Flight Ctr, CRESST, Greenbelt, MD 20771 USA 4.Univ Maryland Baltimore Cty, Joint Ctr Astrophys, Baltimore, MD 21250 USA 5.Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England 6.Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England 7.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA 8.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 9.CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain 10.Natl Cent Univ, Inst Astron, Chungli 32054, Taiwan |
| 推荐引用方式 GB/T 7714 | Zheng, W.,Shen, R. F.,Sakamoto, T.,et al. PANCHROMATIC OBSERVATIONS OF THE TEXTBOOK GRB 110205A: CONSTRAINING PHYSICAL MECHANISMS OF PROMPT EMISSION AND AFTERGLOW[J]. ASTROPHYSICAL JOURNAL,2012,751(2):90(21pp). |
| APA | Zheng, W..,Shen, R. F..,Sakamoto, T..,Beardmore, A. P..,De Pasquale, M..,...&Yuan, F..(2012).PANCHROMATIC OBSERVATIONS OF THE TEXTBOOK GRB 110205A: CONSTRAINING PHYSICAL MECHANISMS OF PROMPT EMISSION AND AFTERGLOW.ASTROPHYSICAL JOURNAL,751(2),90(21pp). |
| MLA | Zheng, W.,et al."PANCHROMATIC OBSERVATIONS OF THE TEXTBOOK GRB 110205A: CONSTRAINING PHYSICAL MECHANISMS OF PROMPT EMISSION AND AFTERGLOW".ASTROPHYSICAL JOURNAL 751.2(2012):90(21pp). |
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来源：紫金山天文台
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