Is there a significant fraction of GRBs located in dusty environs?

Páll Jakobsson, Johan P.U. Fynbo

Rannsóknarafurð: Kafli í bók/skýrslu/ráðstefnuritiRáðstefnuframlagritrýni

Útdráttur

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.

Upprunalegt tungumálEnska
Titill gistiútgáfuDeciphering the Ancient Universe with Gamma-Ray Bursts
Síður167-170
Síðufjöldi4
DOI
ÚtgáfustaðaÚtgefið - 2010
ViðburðurInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts" - Kyoto, Japan
Tímalengd: 19 apr. 201023 apr. 2010

Ritröð

NafnAIP Conference Proceedings
Bindi1279
ISSN-númer (prentað)0094-243X
ISSN-númer (rafrænt)1551-7616

Ráðstefna

RáðstefnaInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts"
Land/YfirráðasvæðiJapan
Borg/bærKyoto
Tímabil19/04/1023/04/10

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