{
  "bibcode": "2008GCN..7681....1K",
  "body": "D. A. Kann, F. Ludwig, R. Filgas and S. Klose (TLS tautenburg) report:\n\nWe imaged the afterglow (Klotz et al., GCN 7646) of GRB 080430 (Guidorzi \net al., GCN 7647) with the TLS Schmidt telescope one day after the GRB. \nDirect RRM observations a day earlier were unobtainable due to persistent \nbad weather. We obtained 22 180 second images starting with twilight under \ngood conditions and at airmass 1. The afterglow is visible on all single \nimages.\n\nFrom the SDSS photometry of the field (Cool et al., GCN 7649), we find \nthat the bright star southeast of the afterglow, at R.A. = 11:01:16.88, \nDec. = +51:40:38.6 has g = 17.111, r = 16.539 and i = 16.377. Using the \ntransformations of Jester et al. 2005, we find Rc = 16.458 for this star. \nUsing it as a comparison star, we derive for the afterglow from a stack of \nall images:\n\ntime after burst\tRc\tdRc\n\n1.020536 days\t\t21.20\t0.06\n\nThis is in good agreement with the slightly later measurement of Khamitov \net al. (GCN 7661) but significantly fainter than the magnitude reported by \nPandey et al. (GCN 7663) for an observation a few hours earlier.\n\nData analysis was delayed by access problems.\n\nThis message may be cited.",
  "circularId": 7681,
  "createdOn": 1210017639000,
  "email": "kann@tls-tautenburg.de",
  "subject": "GRB 080430: TLS imaging one day after the GRB",
  "submitter": "Alexander Kann at TLS Tautenburg  <kann@tls-tautenburg.de>",
  "eventId": "GRB 080430"
}