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A Study of GRBs with Low-luminosity Afterglows
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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2017 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 850, no 2, 117Article in journal (Refereed) Published
Abstract [en]

We present a sample composed of the 41 faintest X-ray afterglows of the population of long gamma-ray bursts (lGRBs) with known redshift. We study their intrinsic properties (spectral index, decay index, distance, luminosity, isotropic radiated energy, and peak energy) and their luminosity distribution functions to assess whether they belong to the same population as the brighter afterglow events. We find that these events belong to a population of nearby ones, different from the general population of lGRBs. In addition, these events are faint during their prompt phase, and include the few possible outliers of the Amati relation.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2017. Vol. 850, no 2, 117
Keyword [en]
gamma-ray burst: general, methods: data analysis, X-rays: general
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-219493DOI: 10.3847/1538-4357/aa947dISI: 000416005400007OAI: oai:DiVA.org:kth-219493DiVA: diva2:1163443
Note

QC 20171207

Available from: 2017-12-07 Created: 2017-12-07 Last updated: 2017-12-07Bibliographically approved

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Begue, Dereli

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