{
  "bibcode": "2003GCN..1992....1A",
  "body": "M. I. Andersen (Astrophysikalisches Institut Potsdam)\nG. Masi (University of Rome \"Tor Vergata\" and European Southern Observatory,\nChile), B. L. Jensen and J. Hjorth (Copenhagen University) report:\n\n\nWe have obtained R-band observations of the afterglow of GRB030328,\ninitially reported by Peterson & Price (GCN 1974), using the Danish 1.54m\ntelescope (La Silla) + DFOSC. Using the zero point reported by Fugazza et al.\n(GCN 1982) (star B=16.31) a preliminary analysis gives\n\nMar. 29, 02:59 UT   20.91 +/- 0.09\nMar. 29, 03:12 UT   20.73 +/- 0.07\nMar. 29, 03:34 UT   21.00 +/- 0.09\nMar. 29, 03:54 UT   20.85 +/- 0.06\nMar. 29, 04:15 UT   21.00 +/- 0.07\nMar. 29, 04:42 UT   20.95 +/- 0.07\nMar. 29, 05:21 UT   21.10 +/- 0.07\nMar. 29, 05:53 UT   21.03 +/- 0.07\nMar. 29, 07:17 UT   21.23 +/- 0.10\nMar. 29, 07:46 UT   21.36 +/- 0.11\n\nA fit to this data set gives a decay index of alpha = 1.6 +/- 0.3.\nIf the two last data points are ignored and the two data points\nfrom Fugazza et al. are included, a decay index of alpha = 1.2 +/- 0.2\nis derived. This is consistent with the early decay index of\nalpha = 1.0 +/- 0.1 reported by Price and Peterson (GCN 1977) and\nmay indicate that the light curve encountered a break around t=0.8 days.\n\nThis message may be cited.",
  "circularId": 1992,
  "createdOn": 1048952880000,
  "email": "mandersen@aip.de",
  "subject": "GRB030328: Decay index",
  "submitter": "Michael I. Andersen at Astrophys.Inst.Potsdam  <mandersen@aip.de>",
  "eventId": "GRB 030328"
}