{
  "bibcode": "2007GCN..6048....1D",
  "body": "D.T. Durig (Cordell-Lorenz Observatory, University of the South) and\nB. Gary (Hereford Arizona Observatory) report on behalf of the AAVSO\nInternational High Energy Network on optical observations of\nGRB070125 (GCN #6024, Hurley et al.):\n\nD.T. Durig reports the following unfiltered (CR) magnitudes:\n\n2007 Jan 27, 04:02:58 UT: 19.4 +/- 0.2 (CR)\n2007 Jan 27, 05:08:10 UT: 19.7 +/- 0.2 (CR)\n2007 Jan 27, 06:13:17 UT: 19.9 +/- 0.2 (CR)\n2007 Jan 27, 07:27:28 UT: 20.0 +/- 0.2 (CR)\n\nB. Gary reports the following unfiltered magnitudes:\n\n2007 Jan 27, 06:22:12 UT: 19.58 +/- 0.12 (clear)\n2007 Jan 28, 05:36:00 UT: 20.20 +/- 0.24 (clear)\n\nDetails of these observations are available from the AAVSO at\nftp://ftp.aavso.org/grb , and full details of these observations\nare available at the following URLs:\n\nDurig: http://www.aavso.org/pipermail/aavso-hen/2007-January/006934.html\nGary: http://www.aavso.org/pipermail/aavso-hen/2007-January/006937.html\n\n-----------------------------\n\nObserver: D. T. Durig, D. S. Hardage, N. M. Haymond, (CLW01)\nReport: Afterglow is very faintly visible in single 120 sec images with\nSNR 2.5 to 3.5. Very obvious in stacks of 10, 15 and 30 frames. Position\nof 07 51 17.74 +31 09 04.1. Stacks of 30 frames gives SNR of 13 with\nmagnitude falling from 19.6 to 19.7 to 19.9 to 20.0 in each hour long\nstack. We lost about 12 minutes in the last stack because we lost our\nguide star, so intervals are slightly different. GIF image posted to\nhttp://arthur.sewanee.edu/obsv/view.php\n\nObserver: B. Gary\nReport: One day later (2007.01.28, UT = 5.60) CV = 20.20 +/- 0.24. CV\nfor Jan 27 & 28 UT asssume B-V = +0.3. All SE errors are orthogonal sum\nof stochastic and estimated systematic.",
  "circularId": 6048,
  "createdOn": 1169993222000,
  "email": "aavso@aavso.org",
  "subject": "GRB 070125: AAVSO optical observations",
  "submitter": "AAVSO GRB Network at AAVSO  <aavso@aavso.org>",
  "eventId": "GRB 070125"
}