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Determination of the intrinsic luminosity time correlation in the X-ray afterglows of gamma-ray bursts

Determination of the intrinsic luminosity time ...

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dc.contributor.author Dainotti, Maria [SAP11020073] pl
dc.contributor.author Petrosian, Vahe' pl
dc.contributor.author Singal, Jack pl
dc.contributor.author Ostrowski, Michał [SAP11009779] pl
dc.date.accessioned 2015-06-10T14:38:03Z
dc.date.available 2015-06-10T14:38:03Z
dc.date.issued 2013 pl
dc.identifier.issn 0004-637X pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/9271
dc.language eng pl
dc.title Determination of the intrinsic luminosity time correlation in the X-ray afterglows of gamma-ray bursts pl
dc.type JournalArticle pl
dc.abstract.en Gamma-ray bursts (GRBs), which have been observed up to redshifts \mathit{z} \approx 9.5, can be good probes of the early universe and have the potential to test cosmological models. Dainotti’s analysis of GRB Swift afterglow light curves with known redshifts and a definite X-ray plateau shows an anti-correlation between the rest-frame time when the plateau ends (the plateau end time) and the calculated luminosity at that time (or approximately an anti-correlation between plateau duration and luminosity). Here, we present an update of this correlation with a larger data sample of 101 GRBs with good light curves. Since some of this correlation could result from the redshift dependences of these intrinsic parameters, namely, their cosmological evolution, we use the Efron–Petrosian method to reveal the intrinsic nature of this correlation. We find that a substantial part of the correlation is intrinsic and describe how we recover it and how this can be used to constrain physical models of the plateau emission, the origin of which is still unknown. The present result could help to clarify the debated nature of the plateau emission. pl
dc.subject.en cosmological parameters pl
dc.subject.en gamma-ray burst: general pl
dc.subject.en radiation mechanisms: non-thermal pl
dc.description.volume 774 pl
dc.description.number 2 pl
dc.identifier.doi 10.1088/0004-637X/774/2/157 pl
dc.identifier.eissn 1538-4357 pl
dc.title.journal The Astrophysical Journal pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.identifier.articleid 157 pl
dc.rights.original OTHER; inne; ostateczna wersja wydawcy; po opublikowaniu; 12; pl
.pointsMNiSW [2013 A]: 40

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