{
  "bibcode": "2008GCN..8639....1M",
  "body": "D. Malesani, J.P.U. Fynbo, G. Leloudas (DARK/NBI), H. Pedersen (NBI), P. \nJakobsson (Univ. Iceland), S.-M. Niemi, H. Uthas, and C. Villforth \n(NOT), report on behalf of a larger collaboration:\n\nWe observed the field of GRB 081128 (Margutti et al., GCN 8571) with the \nNordic Optical Telescope equipped with ALFOSC. Observations were carried \nout on two epochs, first on 2008 Nov 28.962 (0.24 days after the GRB) in \nthe V, R and i bands and then on Dec 7.827 (9.10 days after the GRB) in \nthe R band. In the first epoch we detect the afterglow candidate \nreported by Wang et al. (GCN 8572) in all filters. We estimate R=22.3 +- \n0.1 assuming R=17.91 for the USNO star at RA = 01:23:11.73, Dec = \n+38:07:43.58 (consistent with the calibration of Guidorzi et al., GCN \n8577; C. Guidorzi, priv. comm.). In the second epoch, the afterglow \ncandidate remains undetected to a limit R > 23.5, and we hence confirm \nthat this source is the GRB afterglow. We note that the V-band detection \nsets a limit on the GRB redshift, z <~ 5.\n\nWe also detect in both epochs a second object at the border of the XRT \nerror circle (RA = 01:23:12.98, Dec = +38:07:38.4), which is likely the \none reported by Guidorzi et al. (GCN 8577), with a magnitude R = 22.7. \nThe angular separation from the afterglow is 1.2\".",
  "circularId": 8639,
  "createdOn": 1228725339000,
  "email": "malesani@astro.ku.dk",
  "subject": "GRB 081128: afterglow observations",
  "submitter": "Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst  <malesani@astro.ku.dk>",
  "eventId": "GRB 081128"
}