A complete sample of bright Swift long gamma-ray bursts: testing the spectral-energy correlations

By L. Nava, Ruben Salvaterra, G. Ghirlanda, G. Ghisellini, S. Campana, S. Covino, G. Cusumano, P. D’Avanzo, V. D’Elia, D. Fugazza and 9 more. 2011

148 citations recorded by the source corpus.

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 Epeak of the prompt emission, the isotropic energetics Eiso and the isotropic luminosity Liso. This GRB sample is characterized by a high level of completeness in redshift (90%). This allows us to probe in an unbiased way the issue related to the physical origin of these correlatio ns against selection effects. We find that one burst, GRB 061021, is an outlier to the Epeak Eiso correlation. Despite this case, we find strong Epeak Eiso and Epeak Liso correlations for the bursts of the complete sample. Their slopes, normalizations and dispersions are consiste nt with those found with the whole sample of bursts with measured redshift and Epeak. 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 Epeak Eiso and Epeak Liso correlations.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/13a8fa74f52cb9948bf625c4b8777ed96f360ca3

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Bing Zhang
2. E. Berger
3. B. Metzger
4. Pawan Kumar
5. A. Pe’er
6. W. Fong
7. F. Ryde
8. L. Amati

Citations in the corpus

• A COMPLETE SAMPLE OF BRIGHT SWIFT LONG GAMMA-RAY BURSTS. I. SAMPLE PRESENTATION, LUMINOSITY FUNCTION AND EVOLUTION (2011, background): “In order to broadly estimate the peak energy of the spectrum, Ep, for a given L, we assumed the validity of the correlation between Ep and L (Yonetoku et al. 2004; Ghirlanda et al. 2005, Nava et al. 2011).”
• The THESEUS space mission concept: science case, design and expected performances (2017, background): “Until now, several GRB complete samples have being created (see, e.g., Perley et al., 2016; Greiner et al., 2001; Salvaterra et al., 2012).”
• An Embedded X-Ray Source Shines through the Aspherical AT 2018cow: Revealing the Inner Workings of the Most Luminous Fast-evolving Optical Transients (2018, background): “For AT 2018cow, the IPN thus rules out at 97% c.l. bursts of γ-rays with peak luminosity >1047 erg s−1, which is the level of the lowest luminosity GRBs detected (e.g., Nava et al. 2012).”