Reverse Shock Emission Revealed in Early Photometry in the Candidate Short GRB 180418A

doi:10.3847/1538-4357/ab275b

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	Reverse Shock Emission Revealed in Early Photometry in the Candidate Short GRB 180418A
	Becerra, R. L.2; Dichiara, S.3,4; Watson, A. M.2; Troja, E.3,4; Fraija, N.2; Klotz, A.5; Butler, N. R.6; Lee, W. H.2; Veres, P.7; Turpin, D.8
刊名	ASTROPHYSICAL JOURNAL
	2019-08-10
卷号	881 期号:1 页码:10
关键词	gamma-ray burst: individual (GRB 180418A)
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab275b
英文摘要	We present observations of the possible short GRB 180418A in gamma-rays, X-rays, and in the optical. Early optical photometry with the TAROT and RATIR instruments shows a bright peak (approximate to 14.2 AB mag) between T + 28 and T + 90 s that we interpret as the signature of a reverse shock. Later observations can be modeled by a standard forward shock model and show no evidence of a jet break, allowing us to constrain the jet collimation to theta(j) > 7 degrees. Using deep late-time optical observations, we place an upper limit of r > 24 AB mag on any underlying host galaxy. The detection of the afterglow in the Swift UV filters constrains the GRB redshift to z < 1.3 and places an upper bound on the gamma-ray isotropic equivalent energy E-gamma,E- iso < 3 x 10(51) erg. The properties of this GRB (e.g., duration, hardness ratio, energy, and environment) lie at the intersection between short and long bursts, and we cannot conclusively identify its type. We estimate that the probability that it is drawn from the population of short GRBs is 10%-30%.
资助项目	NASA[NNX09AH71G] ; NASA[NNX09AT02G] ; NASA[NNX10AI27G] ; NASA[NNX12AE66G] ; CONACyT[INFR-2009-01-122785] ; CONACyT[CB-2008-101958] ; UNAM PAPIIT[IG100414] ; UNAM PAPIIT[IA102917] ; UNAM PAPIIT[IA102019] ; UC MEXUS-CONACyT[CN 09-283] ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; CNES
WOS关键词	GAMMA-RAY BURST ; AFTERGLOW LIGHT CURVES ; OPTICAL FLASH ; EARLY MULTIWAVELENGTH ; NUMBER COUNTS ; PRE-SWIFT ; PROMPT ; MODELS ; JETS ; FIREBALL
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000480291200003
资助机构	NASA ; NASA ; CONACyT ; CONACyT ; UNAM PAPIIT ; UNAM PAPIIT ; UC MEXUS-CONACyT ; UC MEXUS-CONACyT ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; CNES ; CNES ; NASA ; NASA ; CONACyT ; CONACyT ; UNAM PAPIIT ; UNAM PAPIIT ; UC MEXUS-CONACyT ; UC MEXUS-CONACyT ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; CNES ; CNES ; NASA ; NASA ; CONACyT ; CONACyT ; UNAM PAPIIT ; UNAM PAPIIT ; UC MEXUS-CONACyT ; UC MEXUS-CONACyT ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; CNES ; CNES ; NASA ; NASA ; CONACyT ; CONACyT ; UNAM PAPIIT ; UNAM PAPIIT ; UC MEXUS-CONACyT ; UC MEXUS-CONACyT ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; Instituto de Astronomia of the Universidad Nacional Autonoma de Mexico ; CNES ; CNES
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27375]
专题	中国科学院国家天文台
通讯作者	Becerra, R. L.
作者单位	1.Univ Nacl Autonoma Mexico, Unidad Acad Ensenada, Inst Astron, Ensenada 22860, Baja California, Mexico 2.Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Mexico City 04510, Cdmx, Mexico 3.Univ Maryland, Dept Astron, College Pk, MD 20742 USA 4.NASA, Astrophys Sci Div, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA 5.Inst Rech Astronophys & Planetol, 14 Ave Edouard Belin, F-31400 Toulouse, France 6.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA 7.Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA 8.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 9.CNRS, UMR 7250, ARTEMIS, OCA,UNS, Blvd Observ,BP 4229, F-06304 Nice, France 10.Univ Calif Santa Cruz, UCO Lick Observ, Dept Astron & Astrophys, 1156 High St, Santa Cruz, CA 95064 USA
推荐引用方式 GB/T 7714	Becerra, R. L.,Dichiara, S.,Watson, A. M.,et al. Reverse Shock Emission Revealed in Early Photometry in the Candidate Short GRB 180418A[J]. ASTROPHYSICAL JOURNAL,2019,881(1):10.
APA	Becerra, R. L..,Dichiara, S..,Watson, A. M..,Troja, E..,Fraija, N..,...&Richer, M. G..(2019).Reverse Shock Emission Revealed in Early Photometry in the Candidate Short GRB 180418A.ASTROPHYSICAL JOURNAL,881(1),10.
MLA	Becerra, R. L.,et al."Reverse Shock Emission Revealed in Early Photometry in the Candidate Short GRB 180418A".ASTROPHYSICAL JOURNAL 881.1(2019):10.