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The Observed Offset Distribution of GRBs about Their Hosts

Bloom, Joshua S. and Kulkarni, Shrinivas R. (2001) The Observed Offset Distribution of GRBs about Their Hosts. In: Gamma-Ray Bursts in the Afterglow Era. ESO Astrophysics Symposia. Springer-Verlag , Berlin/Heidelberg, pp. 209-211. ISBN 978-3-540-42771-1.

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We summarize the results of a comprehensive survey to measure the location of 20 cosmological gamma-ray bursts (GRBs) in and around galaxies. We find that all well-localized GRBs to-date fall within 1.2 arcsec (10 kpc in projection) from the nearest detected galaxy. We estimate on statistical grounds that most if not all of these nearby “host” galaxies are indeed physically associated with the respective GRB and not a spurious superposition. The observed distribution of GRBs offsets about their hosts are consistent with a progenitor population that burst near the sites of massive star formation (eg. “collapsars”) and inconsistent with the modeled location of degenerate binary systems (eg. neutron-star-neutron-star and neutron-star-black-hole mergers) which travel far from their birthsite.

Item Type:Book Section
Related URLs:
URLURL TypeDescription ReadCube access
Bloom, Joshua S.0000-0002-7777-216X
Kulkarni, Shrinivas R.0000-0001-5390-8563
Additional Information:© Springer-Verlag Berlin Heidelberg 2001
Subject Keywords:Star Formation; Host Galaxy; Galaxy Star Formation; Massive Star Formation; Star Formation Model
Series Name:ESO Astrophysics Symposia
Record Number:CaltechAUTHORS:20190826-124739149
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98231
Deposited By: George Porter
Deposited On:26 Aug 2019 21:49
Last Modified:16 Nov 2021 17:37

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