Hubble Space Telescope Space Telescope Imaging Spectrograph imaging of thehost galaxy of GRB 980425/SN 1998bw

Citation
Ju. Fynbo et al., Hubble Space Telescope Space Telescope Imaging Spectrograph imaging of thehost galaxy of GRB 980425/SN 1998bw, ASTROPHYS J, 542(2), 2000, pp. L89-L93
Citations number
40
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
542
Issue
2
Year of publication
2000
Part
2
Pages
L89 - L93
Database
ISI
SICI code
0004-637X(20001020)542:2<L89:HSTSTI>2.0.ZU;2-#
Abstract
We present Hubble Space Telescope Space Telescope Imaging Spectrograph obse rvations of ESO 184-G82, the host galaxy of the gamma-ray burst GRB 980425 associated with the peculiar Type Ic supernova SN 1998bw. ESO 184-G82 is fo und to be an actively star-forming SBc subluminous galaxy. We detect an obj ect consistent with being a point source within the astrometric uncertainty of 0."018 of the position of the supernova. The object is located inside a star-forming region. The object is greater than or equal to1 mag brighter than expected for the supernova based on a simple radioactive decay model. This implies either a significant flattening of the light curve or a contri bution from an underlying star cluster.