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Issue A&A
Volume 447, Number 3, March I 2006
Page(s) 891 - 895
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20054382



A&A 447, 891-895 (2006)
DOI: 10.1051/0004-6361:20054382

The galaxies in the field of the nearby GRB 980425/SN 1998bw

S. Foley1, D. Watson2, J. Gorosabel3, J. P. U. Fynbo2, J. Sollerman2, 4, S. McGlynn1, B. McBreen1 and J. Hjorth2

1  School of Physics, University College Dublin, Dublin 4, Ireland
    e-mail: sfoley@bermuda.ucd.ie
2  Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
3  Instituto de Astrofísica de Andalucía (IAA - CSIC), Apartado de Correos, 3004, 18080 Granada, Spain
4  Stockholm Observatory, AlbaNova, Department of Astronomy, 106 91 Stockholm, Sweden

(Received 9 August 2005 / Accepted 20 October 2005 )

Abstract
We present spectroscopic observations of ESO 184-G82, the host galaxy of GRB 980425/SN 1998bw, and six galaxies in its field. A host redshift of $z=0.0087\pm0.0006$ is derived, consistent with that measured by Tinney et al. (1998, IAU Circ., 6896). Redshifts are obtained for the six surrounding galaxies observed. Three of these galaxies lie within 11 Mpc of each other, confirming the suggestion that some of these galaxies form a group. However, all of the field galaxies observed lie at significantly greater distances than ESO 184-G82 and are therefore not associated with it. The host galaxy of GRB 980425/SN 1998bw thus appears to be an isolated dwarf galaxy and interactions with other galaxies do not seem to be responsible for its star formation.


Key words: galaxies: individual: ESO 184-G82 -- gamma rays: bursts -- supernovae: individual: SN 1998bw

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© ESO 2006

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