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The Optically Unbiased GRB Host (TOUGH) Survey

Published online by Cambridge University Press:  05 September 2012

Páll Jakobsson ,
Jens Hjorth ,
Daniele Malesani ,
Johan P. U. Fynbo ,
Thomas Krühler ,
Bo Milvang-Jensen  and
Nial R. Tanvir
Páll Jakobsson
Affiliation:
Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, 107 Reykjavík, Iceland
Jens Hjorth
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
Daniele Malesani
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
Johan P. U. Fynbo
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
Thomas Krühler
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
Bo Milvang-Jensen
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
Nial R. Tanvir
Affiliation:
Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UK
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Abstract

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We present the results from our Swift/VLT legacy survey, a VLT Large Programme aimed at characterizing the host galaxies of a homogeneously selected sample of Swift gamma-ray bursts (GRBs). The immediate goals are to determine the host luminosity function, study the effects of reddening, determine the fraction of Lyα emitters in the hosts, and obtain redshifts for targets without a reported one. We have carefully selected a sample, obeying strict and well-defined criteria: 69 targets in total. Among the results is a large optical detection rate, the lack of extremely red objects (only one possible case in the sample), and 15 new GRB redshifts with the mean redshift of the host sample assessed to be 〈z〉 ≳ 2.2.

Keywords

dustextinctiongalaxies: fundamental parametersgamma rays: bursts
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S279: Death of Massive Stars: Supernovae and Gamma-Ray Bursts , April 2011 , pp. 187 - 190
Copyright
Copyright © International Astronomical Union 2012

References

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