{
  "bibcode": "2005GCN..4246....1K",
  "body": "D. A. Kann, P. Ferrero, B. Stecklum, S. Klose, Thueringer\nLandessternwarte Tautenburg, Germany, report:\n\nThe XRT position (Perri et al., GCN 4073) of GRB 051008 (Marshall et\nal., GCN 4069, Golenetskii et al., GCN 4078) was reobserved with the\nTautenburg 1.34m Schmidt telescope on October 29, 30 and 31, in good\nconditions but near dawn. We obtained 30x60 second Rc-band images in\neach epoch. The total exposure of the stacked images is 90 minutes\n(meantime 21.5 days after the burst). The flux of the bright star\nHD 117710 close to the XRT error circle was carefully removed.\n\nThe potential host galaxy (Rumyantsev et al., GCN 4081, 4087) is\nclearly detected. At the position of the probable afterglow\n(Rumyantsev et al., GCN 4087), no source is detected down to a\nlimiting magnitude of Rc = 22.5.\n\nUnder the assumption that this burst is at a low redshift (Ferrero et\nal., GCN 4085), the failure to detect a supernova rebrightening\nimplies either an underluminous supernova in comparison to SN 1998bw,\nwhich is not unusual (cf. Zeh et al. 2004, ApJ, 609, 952), or a large\namount of source frame extinction, which is indicated by the very high\nexcess N_H column density along the line of sight (30 times the\nGalactic column density, Perri et al., GCN 4080). This situation is\ncomparable to the bright GRB 051022 for which no afterglow was\ndetected and a large amount of source frame extinction was implied\nfrom X-ray observations (Butler et al., GCN 4170, and references\ntherein).\n\nSpectroscopic observations of the putable host galaxy are encouraged.\n\nThis message may be cited.",
  "circularId": 4246,
  "createdOn": 1131650644000,
  "email": "klose@tls-tautenburg.de",
  "subject": "GRB 051008 Tautenburg Supernova Search",
  "submitter": "Sylvio Klose at TLS Tautenburg  <klose@tls-tautenburg.de>",
  "eventId": "GRB 051008"
}