Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow
文献类型：期刊论文
| 作者 | Lesage,S.30,31; Veres,P.30,31; Briggs,M. S.30,31; Goldstein,A.29; Kocevski,D.28; Burns,E.27; Wilson-Hodge,C. A.28; Bhat,P. N.30,31; Huppenkothen,D.26; Fryer,C. L.25 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 952期号:2 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ace5b4 |
| 通讯作者 | Lesage,S.() |
| 英文摘要 | Abstract We report the discovery of GRB 221009A, the highest flux gamma-ray burst (GRB) ever observed by the Fermi Gamma-ray Burst Monitor (Fermi-GBM). This GRB has continuous prompt emission lasting more than 600 s, which smoothly transitions to afterglow emission visible in the Fermi-GBM energy range (8 keV–40 MeV), and total energetics higher than any other burst in the Fermi-GBM sample. By using a variety of new and existing analysis techniques we probe the spectral and temporal evolution of GRB 221009A. We find no emission prior to the Fermi-GBM trigger time (t 0; 2022 October 9 at 13:16:59.99 UTC), indicating that this is the time of prompt emission onset. The triggering pulse exhibits distinct spectral and temporal properties suggestive of the thermal, photospheric emission of shock breakout, with significant emission up to ～15 MeV. We characterize the onset of external shock at t 0 + 600 s and find evidence of a plateau region in the early-afterglow phase, which transitions to a slope consistent with Swift-XRT afterglow measurements. We place the total energetics of GRB 221009A in context with the rest of the Fermi-GBM sample and find that this GRB has the highest total isotropic-equivalent energy (E γ,iso = 1.0 × 1055 erg) and second highest isotropic-equivalent luminosity (L γ,iso = 9.9 × 1053 erg s–1) based on its redshift of z = 0.151. These extreme energetics are what allowed us to observe the continuously emitting central engine of Fermi-GBM from the beginning of the prompt emission phase through the onset of early afterglow. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:APJL_952_2_L42 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/26206]  |
| 专题 | 星系类星体研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Lesage,S. |
| 作者单位 | 1.Praxis Inc., Alexandria, VA 22303, resident at Naval Research Laboratory, Washington, DC 20375, USA 2.Dipartimento di Fisica, Università degli Studi di Torino, I-10125 Torino, Italy 3.Istituto Nazionale di Fisica Nucleare, Sezione di Torino, I-10125 Torino, Italy 4.W.W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305, USA 5.Istituto Nazionale di Fisica Nucleare, Sezione di Bari, I-70126 Bari, Italy 6.Dipartimento di Fisica “M. Merlin”dell’Università e del Politecnico di Bari, via Amendola 173, I-70126 Bari, Italy 7.Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa, Italy 8.Instituto de Astrofísica de Canarias and Universidad de La Laguna, Dpto. Astrofísica, E-38200 La Laguna, Tenerife, Spain 9.Center for Space Studies and Activities “G. Colombo,” University of Padova, Via Venezia 15, I-35131 Padova, Italy 10.Dipartimento di Fisica e Astronomia “G. Galilei,” Università di Padova, Via F. Marzolo, 8, I-35131 Padova, Italy |
| 推荐引用方式 GB/T 7714 | Lesage,S.,Veres,P.,Briggs,M. S.,et al. Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow[J]. The Astrophysical Journal Letters,2023,952(2). |
| APA | Lesage,S..,Veres,P..,Briggs,M. S..,Goldstein,A..,Kocevski,D..,...&侯贤.(2023).Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow.The Astrophysical Journal Letters,952(2). |
| MLA | Lesage,S.,et al."Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow".The Astrophysical Journal Letters 952.2(2023). |
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来源：云南天文台
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