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Sökning: onr:"swepub:oai:DiVA.org:su-205198" > The long-active aft...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003924naa a2200613 4500
001oai:DiVA.org:su-205198
003SwePub
008220609s2022 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2051982 URI
0247 a https://doi.org/10.1093/mnras/stac10612 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Kumar, Harsh4 aut
2451 0a The long-active afterglow of GRB 210204A :b detection of the most delayed flares in a gamma-ray burst
264 c 2022-04-18
264 1b Oxford University Press (OUP),c 2022
338 a print2 rdacarrier
520 a We present results from extensive broadband follow-up of GRB 210204A over the period of 30 d. We detect optical flares in the afterglow at 7.6 x 10(5) s and 1.1 x 10(6) s after the burst: the most delayed flaring ever detected in a GRB afterglow. At the source redshift of 0.876, the rest-frame delay is 5.8 x 10(5) s (6.71 d). We investigate possible causes for this flaring and conclude that the most likely cause is a refreshed shock in the jet. The prompt emission of the GRB is within the range of typical long bursts: it shows three disjoint emission episodes, which all follow the typical GRB correlations. This suggests that GRB 210204A might not have any special properties that caused late-time flaring, and the lack of such detections for other afterglows might be resulting from the paucity of late-time observations. Systematic late-time follow-up of a larger sample of GRBs can shed more light on such afterglow behaviour. Further analysis of the GRB 210204A shows that the late-time bump in the light curve is highly unlikely due to underlying SNe at redshift (z) = 0.876 and is more likely due to the late-time flaring activity. The cause of this variability is not clearly quantifiable due to the lack of multiband data at late-time constraints by bad weather conditions. The flare of GRB 210204A is the latest flare detected to date.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
653 a methods: data analysis
653 a gamma-ray burst: general
653 a gamma-ray burst: individual: GRB 210204A
7001 a Gupta, Rahul4 aut
7001 a Saraogi, Divita4 aut
7001 a Ahumada, Tomas4 aut
7001 a Andreoni, Igor4 aut
7001 a Anupama, G. C.4 aut
7001 a Aryan, Amar4 aut
7001 a Barway, Sudhanshu4 aut
7001 a Bhalerao, Varun4 aut
7001 a Chandra, Poonam4 aut
7001 a Coughlin, Michael W.4 aut
7001 a Dutta, Anirban4 aut
7001 a Ghosh, Ankur4 aut
7001 a Ho, Anna Y. Q.4 aut
7001 a Kool, Erik C.u Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)erko1670
7001 a Kumar, Amit4 aut
7001 a Medford, Michael S.4 aut
7001 a Misra, Kuntal4 aut
7001 a Pandey, Shashi B.4 aut
7001 a Perley, Daniel A.4 aut
7001 a Riddle, Reed4 aut
7001 a Ror, Amit Kumar4 aut
7001 a Setiadi, Jason M.4 aut
7001 a Yao, Yuhan4 aut
7102 a Stockholms universitetb Institutionen för astronomi4 org
7730 t Monthly notices of the Royal Astronomical Societyd : Oxford University Press (OUP)g 513:2, s. 2777-2793q 513:2<2777-2793x 0035-8711x 1365-2966
8564 u https://academic.oup.com/mnras/article/513/2/2777/6569719?login=truey The long-active afterglow of GRB 210204A: detection of the most delayed flares in a gamma-ray burst
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-205198
8564 8u https://doi.org/10.1093/mnras/stac1061

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