Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/18628
 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 Links: http://hdl.handle.net/2381/18628http://www.aanda.org/articles/aa/abs/2003/10/aa3302/aa3302.html 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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