{
  "bibcode": "2005GCN..3363....1M",
  "body": "N. Mirabal (U. Michigan), M. Boettcher, J. Shields, M. Joshi (Ohio U.),\nand J. P. Halpern (Columbia U.) report on behalf of the MDM GRB follow-up\nteam:\n\n\"We monitored the optical afterglow (Yost et al., GCN #3322) of GRB\n050502a with the MDM 1.3m telescope beginning on 2005 May 2.163 UT and\nspanning from 1.8 hr to 8.2 hr after the burst. Preliminary photometry\nreferenced to a USNO-B1.0 star at (J2000) R.A. 13:29:59.84, Decl.\n+42:43:00.2 listed as R = 16.01, indicates that the OT faded from \napproximately R~19.3 on May 2.163 to R~21.4 on May 2.36, and continued to \ndecline until the end of the monitoring period.  The corresponding \npower-law decay index is -1.44 +/- 0.2. This is steeper than the decay \nindex of -1.03 estimated from the earlier observations of Yost et al. \n(GCN #3322).\"",
  "circularId": 3363,
  "createdOn": 1115341393000,
  "email": "mirabal@umich.edu",
  "subject": "GRB 050502a: Optical Observations",
  "submitter": "Nestor Mirabal at U Michigan  <mirabal@umich.edu>",
  "eventId": "GRB 050502A"
}