{
  "bibcode": "2008GCN..8577....1G",
  "body": "C. Guidorzi (INAF-OAB), N. Tanvir (U. Leicester), I.A. Steele, R.J. Smith,\nC.G. Mundell, D. Bersier (Liverpool JMU), A. Gomboc (U. Ljubljana)\nreport on behalf of a larger collaboration:\n\nOn 2008 November 28 (22:16:14 UT) we began observing the field of GRB 081128\n(Margutti et al. GCN Circ. 8571) with the Liverpool Telescope.\nObservations consisted of two sequences of 6x300s exposures acquired\nusing the SDSS-i and SDSS-r filters, respectively.\n\nIn our coadded frame we detect a single source inside the refined XRT\nerror box (Evans et al. GCN Circ. 8573) at the position\nRA(J2000)=01:23:13.05, Dec(J2000)=+38:07:38.7 (0.6\" error radius)\nconsistent with the optical candidate reported by Lin et al. (GCN Circ.\n8575) and Andreev et al. (GCN Circ. 8576).\nWe found the following magnitude for this object:\n\n\nTelescope   Filter  T_mid[hr]   Exposure[s]    M_lim\n-----------------------------------------------------------\nLT          SDSS-r    6.66        6x300        21.9 +/- 0.2\n-----------------------------------------------------------\n\nThe calibration was performed using the R2 magnitudes of several USNOB-1\ncatalogue field objects. Compared with the value reported by Lin et al.\n(GCN Circ. 8575), our measurement shows that the candidate has faded\nbetween the two epochs.\nThere also appears to be a neighbouring source just outside the XRT\nerror circle, which might be a host galaxy.",
  "circularId": 8577,
  "createdOn": 1227957704000,
  "email": "cristiano.guidorzi@brera.inaf.it",
  "subject": "GRB 081128: Liverpool Telescope afterglow confirmation",
  "submitter": "Cristiano Guidorzi at INAF-OAB  <cristiano.guidorzi@brera.inaf.it>",
  "eventId": "GRB 081128"
}