| Auteurs | J. Gorosabel, L. Christensen, J. Hjorth, J.U. Fynbo, H. Pedersen, B.L. Jensen, M.I. Andersen, N. Lund, A.O. Jaunsen, J.M. Castro Ceron, A.J. Castro-Tirado, A. Fruchter, J. Greiner, E. Pian, P.M. Vreeswijk, I. Burud, F. Frontera, L. Kaper, S. Klose, C. Kouveliotou, N. Masetti, E. Palazzi, J. Rhoads, E. Rol, M.I. de Salamanca, N. Tanvir, R.A.M.J. Wijers, E.P.J. van den Heuvel | | Titel | A multi-colour study of the dark GRB 000210 host galaxy and its environment |
| Tijdschrift | Astronomy and Astrophysics |
| Jaargang | 400 |
| Jaar | 2003 |
| Pagina's | 127-136 |
| ISSN | 00046361 |
| Faculteit | Faculteit der Natuurwetenschappen, Wiskunde en Informatica |
| Instituut/afd. | FNWI: Astronomical Institute Anton Pannekoek (IAP) |
| Trefwoorden | Gamma ray bursts; Photometric techniques |
| Samenvatting | We present UBVRIZJsHKs 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=0.8463B1 0.0002) proposed by Piro et al. (cite{Piro02}) based on a single emission line. Furthermore, we have determined the photometric redshift of all the galaxies in an area of 6' C 6' 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 ~ 0.5 B1 0.2 L*), with no companions above our detection threshold of 0.18 B1 0.06 L*. Based on the restframe ultraviolet flux a star formation rate of 2.1 B1 0.2 Mb
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 (AV ~ 0). We discuss the implications of the inferred low value of AV and the age of the dominant stellar population for the non-detection of the GRB 000210 optical afterglow. Based on observations collected at the European Southern Observatory, in La Silla and Paranal (Chile), ESO Large Programmes 165.H-0464(E), 165.H-0464(I) and 265.D-5742(C), granted to the GRACE Team. Based on observations made with the Danish 1.54-m telescope, in La Silla (Chile). |
| Opmerkingen | cop. 2003 EDP sciences |
| Soort document | Artikel |
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