GRB090111: extra soft steep-decay emission and peculiar rebrightening

	GRB090111: extra soft steep-decay emission and peculiar rebrightening
	Margutti, R 1,2; Sakamoto, T 3; Chincarini, G 1,2; Guidorzi, C 2,4; Mao JR(毛基荣)2,5; Pasotti, F 2; Burrows, D 6; D'Avanzo, P 1; Campana, S 2; Barthelmy, SD 3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2009-11-21
卷号	400 期号:1 页码:L1-L5
关键词	radiation mechanisms: non-thermal gamma-rays: bursts X-rays: individual: GRB090111
ISSN号	0035-8711
通讯作者	Margutti, R (reprint author), Univ Milano Bicocca, Pza Sci 3, I-20126 Milan, Italy.
产权排序	第五完成单位
英文摘要	We present a detailed study of GRB090111, focusing on its extra soft power-law photon index Gamma > 5 at the very steep-decay phase emission (power-law index alpha = 5.1, steeper than 96 per cent of gamma-ray bursts detected by Swift) and the following peculiar X-ray rebrightening. Our spectral analysis supports the hypothesis of a comoving band spectrum with the peak of the nu F(nu) spectrum evolving with time to lower values: a period of higher temporal variability in the 1-2 keV light curve ends when the E(peak) evolves outside the energy band. The X-ray rebrightening shows extreme temporal properties when compared to a homogeneous sample of 82 early flares detected by Swift. While an internal origin cannot be excluded, we show these properties to be consistent with the energy injection in refreshed shocks produced by slow shells colliding with the fastest ones from behind, well after the internal shocks that are believed to give rise to the prompt emission have ceased.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	GAMMA-RAY BURSTS ; SWIFT-XRT OBSERVATIONS ; SPECTRAL EVOLUTION ; AFTERGLOW EMISSION ; ALERT TELESCOPE ; 1ST SURVEY ; DENSITY ; DIVERSITY ; FLASHES ; MISSION
收录类别	SCI
原文出处	http://mnrasl.oxfordjournals.org/content/400/1/L1
语种	英语
WOS记录号	WOS:000271708900001
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4973]
专题	云南天文台_高能天体物理研究组
作者单位	1.Università degli studi Milano Bicocca, P.za della Scienza 3, Milano 20126, Italy 2.INAF Osservatorio Astronomico di Brera, via Bianchi 46, Merate 23807, Italy 3.NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA 4.Dipartimento di Fisica, Università di Ferrara, via Saragat 1, I-44100, Ferrara, Italy 5.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan Province, China 6.Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA
推荐引用方式 GB/T 7714	Margutti, R,Sakamoto, T,Chincarini, G,et al. GRB090111: extra soft steep-decay emission and peculiar rebrightening[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,400(1):L1-L5.
APA	Margutti, R.,Sakamoto, T.,Chincarini, G.,Guidorzi, C.,Mao JR.,...&Gehrels, N.(2009).GRB090111: extra soft steep-decay emission and peculiar rebrightening.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,400(1),L1-L5.
MLA	Margutti, R,et al."GRB090111: extra soft steep-decay emission and peculiar rebrightening".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 400.1(2009):L1-L5.