Nava, L. 2011 较大样本的E_p-E_iso, E_p-L_iso关系

主要内容:
截止到2011.5的所有能得到数据的Swift暴。包含相应的数据.

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· arXiv e-print (arXiv:1112.4470)

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Title:		A complete sample of bright Swift Long Gamma Ray Bursts: testing the spectral-energy correlations
Authors:		Nava, L.;
Publication:		eprint arXiv:1112.4470
Publication Date:		12/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		9 pages, 4 figures, 2 tables. Accepted for publication by MNRAS
Bibliographic Code:		2011arXiv1112.4470N

Abstract

We use a nearly complete sample of Gamma Ray Bursts (GRBs) detected by the Swift satellite to study the correlations between the spectral peak energy Ep of the prompt emission, the isotropic energetics Eiso and the isotropic luminosity Liso. This GRB sample is characterised by a high level of completeness in redshift (91%). This allows us to probe in an unbiased way the issue related to the physical origin of these correlations against selection effects. We find that one burst, GRB 061021, is an outlier to the Ep-Eiso correlation and another burst, GRB 070328, lies at 3sigma from the Ep-Eiso correlation. Despite these cases, we find strong Ep-Eiso and Ep-Liso correlations for the bursts of the complete sample. Their slopes, normalisations and dispersions are consistent with those found with the whole sample of bursts with measured redshift and Ep. This means that the biases present in the total sample commonly used to study these correlations do not affect their properties. Finally, we also find no evolution with redshift of the Ep-Eiso and Ep-Liso correlations.

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