Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow

doi:10.3847/2041-8213/ace5b4

CORC > 云南天文台 > 中国科学院云南天文台 > 中国科学院天体结构与演化重点实验室

	Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow
	Lesage,S.87,88; Veres,P.87,88; Briggs,M. S.87,88; Goldstein,A.86; Kocevski,D.85; Burns,E.84; Wilson-Hodge,C. A.85; Bhat,P. N.87,88; Huppenkothen,D.83; Fryer,C. L.82
刊名	The Astrophysical Journal Letters
	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
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/26206]
专题	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.Center for Astrophysics and Cosmology, University of Nova Gorica, Nova Gorica, Slovenia 2.Praxis Inc., Alexandria, VA 22303, resident at Naval Research Laboratory, Washington, DC 20375, USA 3.Institució Catalana de Recerca i Estudis Avan?ats (ICREA), E-08010 Barcelona, Spain 4.Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Magrans s/n, E-08193 Barcelona, Spain; and Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain 5.Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan 6.Nagoya University, Institute for Space-Earth Environmental Research, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan 7.NYCB Real-Time Computing Inc., Lattingtown, NY 11560-1025, USA 8.Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064, USA 9.The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova, SE-106 91 Stockholm, Sweden 10.Department of Physics, KTH Royal Institute of Technology, AlbaNova, SE-106 91 Stockholm, Sweden
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..,...&Zaharijas,G..(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).