Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-03-15
Astrophys.J.662:294-303,2007; Astrophys.J.662:294-304,2007
Astronomy and Astrophysics
Astrophysics
Accepted for publication in The Astrophysical Journal. NB: High-resolution version of FIGURE 1 (mosaic) available at http://
Scientific paper
10.1086/517962
We report the results from observations of 24 gamma ray burst (GRB) fields from 2005 and 2006 undertaken at the Danish 1.54m telescope at ESO/La Silla. Photometry and positions for two previously unpublished host galaxy candidates (GRBs 050915 and 051021) are presented, as well as for eight other detected objects which are either known GRB hosts or candidate hosts. The candidates are suitable for spectroscopic follow-up in order to have their redshifts and other physical characteristics determined. In the cases where no likely host candidate is detected inside the refined Swift XRT error circle we are still able to put interesting and rather deep limits on the host magnitude. Based on our detections and upper limits we have performed simulations which suggest that the host galaxies are drawn from a fainter sample than previous (i.e. pre-Swift) studies.
Féron Chloé
Fynbo Johan P. U.
Hjorth Jens
Jaunsen Andreas O.
Ovaldsen Jan-Erik
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