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Title: A multi-colour study of the dark GRB 000210 host galaxy and its environment
Authors: Gorosabel, J.
Christensen, L.
Hjorth, J.
Fynbo, J. U.
Pedersen, H.
Jensen, B. L.
Andersen, M. I.
Lund, N.
Jaunsen, A. O.
Ceron, J. M. C.
Castro-Tirado, A. J.
Fruchter, A.
Greiner, J.
Pian, E.
Vreeswijk, P. M.
Burud, I.
Frontera, F.
Kaper, L.
Klose, S.
Kouveliotou, C.
Masetti, N.
Palazzi, E.
Rhoads, J.
Rol, E.
Salamanca, I.
Tanvir, N.
Wijers, R. A. M. J.
van den Heuvel E.
First Published: 1-Mar-2003
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2003, 400 (1), pp. 127-136
Abstract: We present UBVRIZJs HKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of any GRB host galaxy. A grid of spectral templates have been fitted to the Spectral Energy Distribution (SED) of the host. The derived photometric redshift is z=0.842+0.054-0.042, which is in excellent agreement with the spectroscopic redshift ( $z=0.8463\pm 0.0002$) proposed by Piro et al. (2002) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of $6^{\prime} \times 6^{\prime}$ around the host galaxy, in order to check for their overdensity in the environment of the host. We find that the GRB 000210 host galaxy is a subluminous galaxy ( $L \sim 0.5 \pm 0.2 \ L^{\star}$ ), with no companions above our detection threshold of $0.18 \pm 0.06 \ L^{\star}$. Based on the restframe ultraviolet flux a star formation rate of $2.1 \pm 0.2 \ M_{\odot}$ yr -1 is estimated. The best fit to the SED is obtained for a starburst template with an age of 0.181+0.037-0.026 Gyr and a very low extinction ( $A_{\rm V} \sim 0$). We discuss the implications of the inferred low value of $A_{\rm V}$ and the age of the dominant stellar population for the non-detection of the GRB 000210 optical afterglow.
DOI Link: 10.1051/0004-6361:20021907
ISSN: 0004-6361
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2002 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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