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  Viewing short gamma-ray bursts from a different angle

Burgess, J. M., Greiner, J., Bégué, D., Giannios, D., Berlato, F., & Lipunov, V. M. (2020). Viewing short gamma-ray bursts from a different angle. Frontiers in Astronomy and Space Sciences, 7: 40. doi:10.3389/fspas.2020.00040.

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Viewing Short Gamma-Ray Bursts From a Different Angle.pdf (Any fulltext), 810KB
 
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Burgess, J. Michael1, Author              
Greiner, Jochen1, Author              
Bégué, Damien1, Author              
Giannios, Dimitrios, Author
Berlato, Francesco1, Author              
Lipunov, Vladimir M., Author
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1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: The detection of a faint, short gamma-ray burst (GRB 170817A) in coincidence with the gravitational wave (GW 170817) detection by LIGO/Virgo is at odds with the expected known luminosity and redshift distribution of short GRBs (sGRB). Examining the observer-frame parameter space of all Fermi-GBM sGRBs shows that the sGRB associated with GW 170817 is extreme in its combination of flux, spectral softness and temporal structure. We identify a group of similar GRBs, one of which has been associated to a bright galaxy at 75 Mpc. We speculate that a good fraction of the previously detected faint sGRBs is not at large redshifts, but local, at redshift smaller than 0.1, seen off-axis. We incorporate off-axis emission in the estimate of the rates of sGRBs, and predict that a large fraction of future GW-detections of NS-NS mergers will be accompanied by faint γ-ray emission, contrary to previous thinking. The much wider gamma-ray emission cone from NS-NS mergers also implies a higher deadly rate of γ-rays for extraterrestrial life in the Universe.

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Language(s): eng - English
 Dates: 2020-08-20
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3389/fspas.2020.00040
Other: LOCALID: 3267170
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Title: Frontiers in Astronomy and Space Sciences
Source Genre: Journal
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Publ. Info: Lausanne : Frontiers Media
Pages: - Volume / Issue: 7 Sequence Number: 40 Start / End Page: - Identifier: ISSN: 2296-987X
CoNE: https://pure.mpg.de/cone/journals/resource/2296-987X