The Maximum Isotropic Energy of Gamma-Ray Bursts
The most energetic gamma-ray bursts (GRBs) are remarkable sources releasing huge amounts of energy on short timescales. Their prompt emission, which usually lasts a few seconds, is so bright that it is visible across the whole observable universe. Studying these extreme events may provide clues on t...
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| Veröffentlicht in: | The Astrophysical journal 2017-03, Vol.837 (2), p.119 |
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| creator | Atteia, J.-L. Heussaff, V. Dezalay, J.-P. Klotz, A. Turpin, D. Tsvetkova, A. E. Frederiks, D. D. Zolnierowski, Y. Daigne, F. Mochkovitch, R. |
| description | The most energetic gamma-ray bursts (GRBs) are remarkable sources releasing huge amounts of energy on short timescales. Their prompt emission, which usually lasts a few seconds, is so bright that it is visible across the whole observable universe. Studying these extreme events may provide clues on the nature of GRB progenitors and on the physical processes at work in relativistic jets. In this paper, we study the bright end of the isotropic energy distribution of long GRBs. We use two samples of long GRBs with redshift detected by Fermi/GBM or Konus-Wind, two instruments that measure the spectral shape and the energetics of the prompt emission accurately. We focus on GRBs within a range of redshifts z = 1-5, a volume that contains a large number of energetic GRBs, and we propose a simple method to reconstruct the bright end of the GRB energy distribution from the observed one. We find that the GRB energy distribution cannot be described by a simple power law but requires a strong cutoff above 1 - 3 × 10 54 erg. We attribute this feature to an intrinsic limit on the energy per unit of solid angle radiated by GRBs. |
| doi_str_mv | 10.3847/1538-4357/aa5ffa |
| format | Article |
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We focus on GRBs within a range of redshifts z = 1-5, a volume that contains a large number of energetic GRBs, and we propose a simple method to reconstruct the bright end of the GRB energy distribution from the observed one. We find that the GRB energy distribution cannot be described by a simple power law but requires a strong cutoff above 1 - 3 × 10 54 erg. 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| subjects | Astrophysics ASTROPHYSICS, COSMOLOGY AND ASTRONOMY COSMIC GAMMA BURSTS EMISSION Energy Energy distribution ENERGY SPECTRA Gamma ray bursts Gamma rays gamma-ray burst: general High Energy Astrophysical Phenomena Physics Power law RED SHIFT RELATIVISTIC RANGE UNIVERSE |
| title | The Maximum Isotropic Energy of Gamma-Ray Bursts |
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