{
  "bibcode": "2003GCN..2068....1B",
  "body": "GRB 030329: Observations with ANDICAM\n\nJ. S. Bloom (CfA), M. Buxton (Yale), C. Bailyn (Yale), P. G. Van\nDokkum (Yale), S. R. Kulkarni (Caltech) report:\n\n\"We observed the afterglow of GRB 030329 (GCN #1985, GCN #1997), using\nCTIO 1.3m + ANDICAM on 2003 April 1.15 UT in photometric conditions. The\nOT was well detected in BVIJH at the following brightness levels:\n\n                                              UT Start, Int Time\nB = 17.671 +/- 0.031   tgrb - t = 2.6676 day (03:33:29, 600 sec)\nV = 17.263 +/- 0.043   tgrb - t = 2.6761 day (03:45:52, 600 sec)\nI = 16.482 +/- 0.056   tgrb - t = 2.6870 day (04:01:30, 600 sec)\n\nOptical photometry was calibrated to the Henden secondary standards (GCN\n#2023). Zeropoint systematics dominate the uncertainties. Magnitudes have\nnot been corrected for Galactic extinction. We intend to obtain an IR\nzeropoint and IR secondary standards over the next few nights.\n\nAssuming a negligible change in flux between observations, we find (V - I)\n= 0.781 +/- 0.070, confirming the V-I color reported in Li et al. (GCN\n#2064). We find (B - V) = 0.408 +/- 0.053, which is inconsistent with Li\net al, but consistent with the B-V color reported Fitzgerald & Orosz (GCN\n#2056).\"\n\nA color composite image of the field may be viewed at:\n http://http://www-cfa.harvard.edu/~jbloom/GRB/grb030329/\n\nMore information about ANDICAM can be obtained at:\n http://www.ctio.noao.edu/yale/parameters.html\n\nThis message can be cited.",
  "circularId": 2068,
  "createdOn": 1049248053000,
  "email": "jbloom@cfa.harvard.edu",
  "subject": "GRB 030329: Observations with ANDICAM",
  "submitter": "Josh Bloom at Harvard/CFA  <jbloom@cfa.harvard.edu>",
  "eventId": "GRB 030329"
}