{
  "bibcode": "2007GCN..7018....1M",
  "body": "T. Minezaki (IoA, Tokyo), P.A. Price (IfA, Hawaii), Y. Yoshii (IoA,\nTokyo), L. Cowie (IfA, Hawaii) and Y. Kakazu (IfA, Hawaii) report:\n\nWe observed the optical afterglow of GRB071025 with the robotic MAGNUM\ntelescope + MIPS dual-beam imager.  We find a fading source in each of\nthe RIYJHK bands at the position reported by Bloom et al. (GCN 6989):\n\n Filter  midtime(UTC)       Exp. time    magnitude/upper limits\n   J     2007-10-25 06:59   10           17.73 +- 0.06\n   R     2007-10-25 07:01   10           21.5  +- 0.4\n   Y     2007-10-25 07:21    9           detected\n   I     2007-10-25 07:21   10           19.97 +- 0.13\n   K     2007-10-25 07:43    8           16.67 +- 0.07\n   R     2007-10-25 07:43   10           > 20.9\n   H     2007-10-25 08:04    9           17.59 +- 0.08\n   I     2007-10-25 08:04   10           20.3 +- 0.2\n   J     2007-10-25 08:25    9           18.29 +- 0.10\n   R     2007-10-25 08:25   10           > 21.0\n   Y     2007-10-25 08:44    9           marginally detected\n   I     2007-10-25 08:44   10           20.5 +- 0.3\n\n\nThe magnitude and the 3-sigma upper limits were derived using the\nUSNO-B1.0 and 2MASS catalogues. The magnitude error does not include the\nerror of the calibration source. The Y-band observations have not been\ncalibrated.\n\nThis message may be cited.",
  "circularId": 7018,
  "createdOn": 1193698925000,
  "email": "price@ifa.hawaii.edu",
  "subject": "GRB071025: Optical+NIR observations",
  "submitter": "Paul Price at IfA,UH  <price@ifa.hawaii.edu>",
  "eventId": "GRB 071025"
}