Lookıng into the fireball: rotse-ııı and swıft observatıons of early gamma-ray burst afterglows

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dc.authoridMcKay, Timothy -- 0000-0001-9036-6150; Guver, Tolga -- 0000-0002-3531-9842; Guver, Tolga -- 0000-0002-3531-9842; Rowell, Gavin -- 0000-0002-9516-1581; Flewelling, Heather -- 0000-0002-1050-4056; Rujopakarn, Wiphu -- 0000-0002-0303-499X; Gogus, Ersin -- 0000-0002-5274-6790
dc.contributor.authorRykoff, E. S.
dc.contributor.authorAharonian, F.
dc.contributor.authorAkerlof, C. W.
dc.contributor.authorAshley, M. C. B.
dc.contributor.authorBarthelmy, S. D.
dc.contributor.authorFlewelling, H. A.
dc.contributor.authorGehrels, N.
dc.contributor.authorGogus, E.
dc.contributor.authorGuver, T.
dc.contributor.authorKiziloglu, Ue.
dc.contributor.authorKrimm, H. A.
dc.contributor.authorMcKay, T. A.
dc.contributor.authorÖzel, Mehmet
dc.contributor.authorPhillips, A.
dc.contributor.authorQuimby, R. M.
dc.contributor.authorRowell, G.
dc.contributor.authorRujopakarn, W.
dc.contributor.authorSchaefer, B. E.
dc.contributor.authorSmith, D. A.
dc.contributor.authorVestrand, W. T.
dc.contributor.authorWheeler, J. C.
dc.contributor.authorWren, J.
dc.contributor.authorYuan, F.
dc.contributor.authorYost, S. A.
dc.date.accessioned12.07.201910:50:10
dc.date.accessioned2019-07-12T15:28:11Z
dc.date.available12.07.201910:50:10
dc.date.available2019-07-12T15:28:11Z
dc.date.issued2009
dc.departmentFen Edebiyat Fakültesien_US
dc.descriptionWOS: 000269244500040en_US
dc.description.abstractWe report on a complete set of early optical afterglows of gamma-ray bursts (GRBs) obtained with the Robotic Optical Transient Search Experiment (ROTSE-III) telescope network from 2005 March through 2007 June. This set is comprised of 12 afterglows with early optical and Swift/X-Ray Telescope observations, with a median ROTSE-III response time of 45 s after the start of gamma-ray emission (8 s after the GCN notice time). These afterglows span 4 orders of magnitude in optical luminosity, and the contemporaneous X-ray detections allow multi-wavelength spectral analysis. Excluding X-ray flares, the broadband synchrotron spectra show that the optical and X-ray emission originate in a common region, consistent with predictions of the external forward shock in the fireball model. However, the fireball model is inadequate to predict the temporal decay indices of the early afterglows, even after accounting for possible long-duration continuous energy injection. We find that the optical afterglow is a clean tracer of the forward shock, and we use the peak time of the forward shock to estimate the initial bulk Lorentz factor of the GRB outflow, and find 100 less than or similar to Gamma(0) less than or similar to 1000, consistent with expectations.en_US
dc.description.sponsorshipNASA [NNG-04WC41G, NNG-06GI90G, NNX-07AF02G]; NSF [AST-0407061, PHY-0801007, AST-0335588, AST-0707769]; Australian Research Council's Discovery Projects; University of New South Wales; University of Texas; University of Michigan; Michigan Space Grant Consortiumen_US
dc.description.sponsorshipE. S. R. thanks the TABASGO foundation. This work has been supported by NASA grant NNG-04WC41G, NSF grants AST-0407061 and PHY-0801007, the Australian Research Council's Discovery Projects funding scheme, the University of New South Wales, the University of Texas, and the University of Michigan. H. A. F. has been supported by NSF grant AST-0335588 and by the Michigan Space Grant Consortium. F. Y. has been supported under NASA Swift Guest Investigator grants NNG-06GI90G and NNX-07AF02G. J.C.W. is supported in part by NSF grant AST-0707769. Special thanks to David Doss at McDonald Observatory, Toni Hanke at the H. E. S. S. site, and Tuncay Ozisik at TUG.en_US
dc.identifier.doi10.1088/0004-637X/702/1/489
dc.identifier.endpage505en_US
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-70449596497
dc.identifier.scopusqualityQ1
dc.identifier.startpage489en_US
dc.identifier.urihttps://doi.org/10.1088/0004-637X/702/1/489
dc.identifier.urihttps://hdl.handle.net/20.500.12507/658
dc.identifier.volume702en_US
dc.identifier.wosWOS:000269244500040
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIOP PUBLISHING LTDen_US
dc.relation.ispartofAstrophysıcal Journal
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectGamma Rays: Burstsen_US
dc.titleLookıng into the fireball: rotse-ııı and swıft observatıons of early gamma-ray burst afterglows
dc.typeArticle

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