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	Konus-Wind observation of GRB 200412B
	Ridnaia, A; Golenetskii, S; Aptekar, R; Frederiks, D; Ulanov, M; Svinkin, D; Tsvetkova, A; Lysenko, A; Cline, T.; Team, Konus-Wind
	2020-04-15
出处	GRB Coordinates Network
英文摘要	The long-duration GRB 200412B (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 27547; Mailyan and Hamburg, GCN Circ. 27558; BALROG localization: Burgess et al., GCN Circ. 27548; Fermi-LAT detection: Longo et al., GCN Circ. 27557; AstoSat CZTI detection: Gupta et al., GCN Circ. 27563; Insight-HXMT/HE detection: Zheng et al., GCN Circ. 27565; CALET-GRBM detection: Tamura et al., GCN Circ. 27572) triggered Konus- Wind at T0=32924.203 s UT (09:08:44.203). The burst light curve shows a multipeaked structure which starts at ~T0-0.5 s and has a total duration of ~30.5 s. The emission is seen up to ~6 MeV. As observed by Konus- Wind, the burst had a fluence of 1.12(-0.05,+0.05)x10^-4 erg/cm2, and a 64-ms peak flux, measured from T0+5.744 s, of 5.12(-0.43,+0.44)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+15.360 s) is best fit in the 20 keV - 6 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.67(-0.05,+0.05), the high energy photon index beta = -2.45(-0.12,+0.10), the peak energy Ep = 289(-16,+16) keV (chi2 = 66/79 dof). The spectrum near the maximum count rate (measured from T0+5.376 to T0+5.888 s) is best fit in the 20 keV - 6 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.15(-0.10,+0.11), the high energy photon index beta = -2.58(-0.17,+0.14), the peak energy Ep = 316(-24,+24) keV (chi2 = 56/56 dof). The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB200412_T32924/ All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
内容类型	GCN
源URL	[http://ir.ihep.ac.cn/handle/311005/287726]
专题	硬X射线调制望远镜卫星
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Ridnaia, A,Golenetskii, S,Aptekar, R,et al. Konus-Wind observation of GRB 200412B. 2020.

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