2005/02/23 by G. Ghirlanda, G. Ghisellini, C. Firmani +2
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Pulsars and Gravitational Waves Research #astro-ph
paper · pdf · doi:10.1111/j.1745-3933.2005.00043.x
5 pages, 5 figures, 2 tables - MNRAS Letters submitted
arxiv created 2005/02/23 · openalex publication_date 2005/06/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29
Abstract We derive the correlation between the peak luminosity Liso and the peak energy of the νFν spectrum Epeak using 25 long gamma-ray bursts (GRBs) with firm redshift measurements. We find that its slope is similar to that of the correlation between the time-integrated isotropic emitted energy Eiso and Epeak. For the 16 GRBs in our sample with estimated jet opening angle, we compute the collimation-corrected peak luminosity Lγ, and find that it correlates with Epeak. This correlation has, however, a scatter larger than that of the correlation between Epeak and Eγ (the time-integrated emitted energy, corrected for collimation), which we ascribe to the fact that the opening angle is estimated through the global energetics. We have then selected a large sample of 442 GRBs with pseudo-redshifts, derived through the lag–luminosity relation, to test the existence of the Liso–Epeak correlation. With this sample we also explore the possibility of a correlation between time-resolved quantities, namely Lpiso and the peak energy at the peak of emission Eppeak.