2012/07/19 by David Gruber, D. Gruber, Gruber, David · 1 citation
Medicine · Physics and Astronomy · #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #Radiation Therapy and Dosimetry #astro-ph.HE
paper · pdf · doi:10.48550/arxiv.1207.4620
Proceedings paper of a talk given at the GRB2012 conference in Munich. Published in Proceedings of Science PoS(GRB 2012)007
arxiv created 2012/07/19 · openalex publication_date 2012/07/19 · arxiv updated 2019/08/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this talk I present the main spectral and temporal properties of Fermi/GBM gamma-ray bursts (GRBs) with known redshift. Key properties of these GRBs in the rest-frame of the progenitor are investigated to better understand the intrinsic nature of these events. The sample comprises 47 GRBs with measured redshift that were observed by GBM until May 2012. 39 sources belong to the long-duration population and 8 events were classified as short bursts. For all of these events we derive, where possible, the intrinsic peak energy in the νFν spectrum (Ep,rest), the duration in the rest-frame, defined as the time in which 90% of the burst counts were observed (T90,rest) and the isotropic equivalent bolometric energy (Eiso). We confirm the tight correlation between Ep,rest and Eiso (Amati relation) with a larger scatter than previously reported. We also confirm the relation between Ep,rest and the 1-s peak luminosity (Lp) (Yonetoku relation). Short GRB 080905A, whose host galaxy was identified at redshift z = 0.1218 is a peculiar outlier of this relation. Moreover, an intriguing, but preliminary, cosmic evolution of Ep,rest was observed, while no such evolution is evident for T90,rest.