@inproceedings{4fc336fa187c4cfca776e186646c0545,
title = "Is there a significant fraction of GRBs located in dusty environs?",
abstract = "We discuss to what extent the current sample of Swift bursts with OA spectroscopy is a biased subsample of all Swift detected GRBs. For that purpose we define an X-ray selected statistical sample of Swift bursts with optimal conditions for ground-based follow up from the period March 2005 to September 2008; 146 bursts fulfill our sample criteria. We derive the redshift distribution for the statistical sample and conclude that less than 18\% of Swift bursts can be at z > 7. Finally, by splitting the sample into three subsamples we conclude that the sample of GRBs with OA spectroscopy is not representative for all Swift bursts, most likely due to a bias against the most dusty sight-lines. This should be taken into account when determining, e.g., the redshift or metallicity distribution of GRBs and when using GRBs as a probe of star formation.",
keywords = "Dust, Extinction, Galaxies: distances and redshifts, Gamma rays: bursts",
author = "P{\'a}ll Jakobsson and Fynbo, \{Johan P.U.\}",
year = "2010",
doi = "10.1063/1.3509257",
language = "English",
isbn = "9780735408296",
series = "AIP Conference Proceedings",
pages = "167--170",
booktitle = "Deciphering the Ancient Universe with Gamma-Ray Bursts",
note = "International Symposium {"}Deciphering the Ancient Universe with Gamma-Ray Bursts{"} ; Conference date: 19-04-2010 Through 23-04-2010",
}