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

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gamma ray bursts
completeness
brightness
thresholds
probes
energy

All Science Journal Classification (ASJC) codes

  • General

Cite this

Nava, L., Salvaterra, R., Ghirlanda, G., Ghisellini, G., Campana, S., Covino, S., ... Vergani, S. D. (2012). Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts. Proceedings of Science, 2012-May.
Nava, Lara ; Salvaterra, Ruben ; Ghirlanda, Giancarlo ; Ghisellini, Gabriele ; Campana, Sergio ; Covino, Stefano ; D’Avanzo, Paolo ; Melandri, Andrea ; Sbarufatti, Boris ; Tagliaferri, Gianpiero ; Vergani, Susanna D. / Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts. In: Proceedings of Science. 2012 ; Vol. 2012-May.
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author = "Lara Nava and Ruben Salvaterra and Giancarlo Ghirlanda and Gabriele Ghisellini and Sergio Campana and Stefano Covino and Paolo D’Avanzo and Andrea Melandri and Boris Sbarufatti and Gianpiero Tagliaferri and Vergani, {Susanna D.}",
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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, SD 2012, 'Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts', Proceedings of Science, vol. 2012-May.

Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts. / Nava, Lara; Salvaterra, Ruben; Ghirlanda, Giancarlo; Ghisellini, Gabriele; Campana, Sergio; Covino, Stefano; D’Avanzo, Paolo; Melandri, Andrea; Sbarufatti, Boris; Tagliaferri, Gianpiero; Vergani, Susanna D.

In: Proceedings of Science, Vol. 2012-May, 01.01.2012.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts

AU - Nava, Lara

AU - Salvaterra, Ruben

AU - Ghirlanda, Giancarlo

AU - Ghisellini, Gabriele

AU - Campana, Sergio

AU - Covino, Stefano

AU - D’Avanzo, Paolo

AU - Melandri, Andrea

AU - Sbarufatti, Boris

AU - Tagliaferri, Gianpiero

AU - Vergani, Susanna D.

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N2 - 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.

AB - 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.

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Nava L, Salvaterra R, Ghirlanda G, Ghisellini G, Campana S, Covino S et al. Prompt spectral properties of a complete sample of Swift Gamma-Ray Bursts. Proceedings of Science. 2012 Jan 1;2012-May.