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WFRF:(Wang Xiang Gao)
 

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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003774naa a2200541 4500
001oai:DiVA.org:su-118539
003SwePub
008150622s2015 | |||||||||||000 ||eng|
009oai:DiVA.org:kth-172241
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1185392 URI
0247 a https://doi.org/10.1088/0004-637X/805/1/132 DOI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1722412 URI
040 a (SwePub)sud (SwePub)kth
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Li, Liangu KTH,Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),KTH Royal Institute of Technology, Sweden,Partikel- och astropartikelfysik4 aut0 (Swepub:kth)P000000
2451 0a A CORRELATED STUDY OF OPTICAL AND X-RAY AFTERGLOWS OF GRBs
264 1c 2015
338 a print2 rdacarrier
500 a QC 20150821
520 a We study an extensive sample of 87 gamma-ray bursts (GRBs) for which there are well-sampled and simultaneous optical and X-ray light curves. We extract the cleanest possible signal of the afterglow component. and compare the temporal behaviors of the X-ray light. curve, observed by Swift XRT, and optical data, observed by UVOT and ground-based telescopes for each individual burst. Overall we find that 62% of the GRBs. are consistent with the standard afterglow model. When more advanced modeling is invoked, up to 91% of the bursts in our sample may be consistent with the external-shock model. A large fraction of these bursts are consistent with occurring in a constant interstellar density medium (61%) while only 39% of them occur in a wind-like medium. Only nine cases have afterglow light curves that exactly match the standard fireball model prediction, having a single power-law decay in both energy bands that are observed during their entire duration. In particular, for the bursts with chromatic behavior, additional model assumptions must be made over limited segments of the light curves in order for these bursts to fully agree with the external-shock model. Interestingly, for 54% of the X-ray and 40% of the optical band observations, the end of the shallow decay (t(similar to-0.5)) period coincides with the jet-break (t(similar to-p)) time, causing an abrupt change in decay slope. The fraction of the burst that is consistent with the external-shock model is independent of the observational epochs in the rest frame of GRBs. Moreover, no cases can be explained by the cooling frequency crossing the X-ray or optical band.
650 7a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng
653 a methods: statistical
653 a reference systems
653 a X-rays: ISM
653 a Theoretical Physics
653 a teoretisk fysik
7001 a Wu, Xue-Feng4 aut
7001 a Huang, Yong-Feng4 aut
7001 a Wang, Xiang-Gao4 aut
7001 a Tang, Qing-Wen4 aut
7001 a Liang, Yun-Feng4 aut
7001 a Zhang, Bin-Bin4 aut
7001 a Wang, Yu4 aut
7001 a Geng, Jin-Jun4 aut
7001 a Liang, En-Wei4 aut
7001 a Wei, Jian-Yan4 aut
7001 a Zhang, Bing4 aut
7001 a Ryde, Felixu KTH,Partikel- och astropartikelfysik4 aut0 (Swepub:kth)u1tlyg6w
7102 a Stockholms universitetb Fysikum4 org
7730 t Astrophysical Journalg 805:1q 805:1x 0004-637Xx 1538-4357
8564 u https://arxiv.org/abs/1503.00976y arXiv:1503.00976
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-118539
8564 8u https://doi.org/10.1088/0004-637X/805/1/13
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172241

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