Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts

Lara Nava, Ruben Salvaterra, Giancarlo Ghirlanda, Gabriele Ghisellini, Sergio Campana, Stefano Covino, Paolo D’Avanzo, Andrea Melandri, Boris Sbarufatti, Gianpiero Tagliaferri, Susanna D. Vergani

Research output: Contribution to journalConference article

Abstract

Thanks to Swift, rapid follow-up studies of GRBs are possible. About 1/3 of all GRBs observed by Swift has measured redshift (an enormous improvement with respect to the pre-Swift era). Salvaterra et al recently defined a subsample of Swift GRBs with 90% of redshift completeness, based on favorable observing conditions (Jakobsonn et al) and prompt brightness. We present their spectral properties and for the first time investigate the spectral-energy correlations in a sample unaffected by biases induced by the measurement of z. Using the complete sample as reference, we simulate samples of GRBs to probe the role of the flux threshold on the Epeak − L relation. We found that the use of flux limited samples in correlation studies cannot be responsible for the existence of the correlation itself.

Original languageEnglish (US)
JournalProceedings of Science
Volume2012-May
StatePublished - Jan 1 2012
Event2012 Gamma-Ray Bursts Conference, GRB 2012 - Munich, Germany
Duration: May 7 2012May 11 2012

All Science Journal Classification (ASJC) codes

  • General

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    Nava, L., Salvaterra, R., Ghirlanda, G., Ghisellini, G., Campana, S., Covino, S., D’Avanzo, P., Melandri, A., Sbarufatti, B., Tagliaferri, G., & Vergani, S. D. (2012). Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts. Proceedings of Science, 2012-May.