{
  "bibcode": "2004GCN..2747....1F",
  "body": "J. P. U. Fynbo (U. Copenhagen), A. Hornstrup (DSRI), J. Hjorth (U.\nCopenhagen), B. L. Jensen (U. Copenhagen), Michael I. Andersen (AIP)\nreport on behalf or a larger collaboration:\n\n\"We have observed the afterglow of GRB 040924 (Fenimore et al. GCN\n#2735; Fox et al. GCN #2734, GCN #2741) with the 2.56-m Nordic Optical\nTelescope on La Palma. By stacking 9 300sec exposures in the R-band with\na mean epoch of Sep 25 5.25 UT we detect a source at the position of the\ncandidate afterglow reported by Fox et al. Assuming a magnitude of\nR=19.1 for the nearby star U1050_00580520 we estimate that the afterglow\nflux is around R=22.1 17.5 hours after the burst. This implies the the\nlightcurve has become steeper than the slope of -0.7 during the first\nhour reported by Fox et al. (GCN #2741).\"    \n\n[GCN OPS NOTE:  This circular was delayed 1.6 hr due to a change in the submiter's\nemail domain.]",
  "circularId": 2747,
  "createdOn": 1096121440000,
  "email": "jfynbo@astro.ku.dk",
  "subject": "GRB040924: Afterglow magnitude at t=17.5hr",
  "submitter": "Johan U. Fynbo at U.Copenhagen  <jfynbo@astro.ku.dk>",
  "eventId": "GRB 040924"
}