{
  "bibcode": "2002GCN..1602....1M",
  "body": "N. Mirabal, E. K. Armstrong, J. P. Halpern (Columbia), and\nJ. Kemp (Joint Astronomy Centre and Columbia) report for the\nMDM GRB follow-up team:\n\n\"Continued monitoring of the optical afterglow of GRB 021004 with\nthe MDM 1.3m yields the following measurements on 2002 Oct 7 UT:\n\n                --------------------\n                  UT      R     +/-\n                --------------------\n                02:38   20.19   0.03\n                06:37   20.14   0.02\n                11:21   20.21   0.04\n                --------------------\n\nHere we used the revised calibration of Henden (GCN #1583) in which\nthe reference star has R=15.52.  Although the decay appears to have\nslowed over the past day, it is difficult to know at this time whether\nit has stopped fading, or for how long.\"\n\nAn updated decay curve accounting for revised calibrations of\nGCN published data is at:\n\nhttp://www.astro.columbia.edu/~jules/021004.ps",
  "circularId": 1602,
  "createdOn": 1034030138000,
  "email": "abulafia@astro.columbia.edu",
  "subject": "GRB 021004: Optical Decay",
  "submitter": "Nestor Mirabal at Columbia U.  <abulafia@astro.columbia.edu>",
  "eventId": "GRB 021004"
}