{
  "bibcode": "2005GCN..3478....1D",
  "body": "D. T. Durig (Cordell-Lorenz Observatory, University of the South), A. Oksanen\n(Nyrola Observatory), C. Pullen (AAVSO) and A. Price (AAVSO) report on behalf of\nthe AAVSO International High Energy Network on optical observations of GRB050525\n(GCN #3466; Band et al.):\n\n An afterglow candidate is found at the location reported by Rykoff et al. (GCN\n#3468) and Band et al. (GCN #3465). At 08:13 UT it is detected at an unfiltered\nmagnitude of 18-19 (fading over 100 mins centered on 08:13UT). The USNO star near\n18 32 34.5 +26 20 24 can not completely be resolved from the afterglow candidate.\nFull details and FITS image URL is below.\n\n Name: Dr. Douglas T. Durig\n email: ddurig@sewanee.edu\n Observer: Dr. D. T. Durig ( CLW01)\n Site: Cordell-Lorenz Observatory\n Location: Sewanee, Tenn., USA\n LatitudeLongitude: 35 12 N 85 55 W\n Elevation: 600 m\n Scope: SCT 0.30 m\n ScopeFocalRatio: f/5.8  1765 mm\n CCDVendor: SBIG STL-1001E\n CCDDetector: KAF 1001E\n CCDSize: 1024x1024\n CCDPixelScale: 2.8\n CCDFOV: 48x48 full, 12x12 quarter frame cropped\n Object: GRB050525\n ObsDate: 2005 05 25\n ObsMidPointTime: 08 13 25\n TimePerFrame: 120 sec\n NumberOfFrames: 75\n Filters: CR\n Processing: dark, flat, register, co-add, 1/4 frame crop\n Seeing: 5-6 arc sec\n LimitingMag: 19.5-20 ???\n Sky: very clear but breezy with Bright Moonlight\n afterglowmag: 18-19\n afterglowerr: 1\n compstars: 1300 UCAC ref stars in full frame\n Report: The USNO star near 18 32 34.5 +26 20 24 can not completely be resolved \nfrom the afterglow candidate, but I do see it fade by around 1 mag over a little \nover 100 min by summing a series of 30 consecutive 120 sec exposures. I get a \nmeasured position of 18 32 33.9 +26 20 23 and 18 mag at 7:23 UT falling to 19 mag \nat 9:03 UT, but this includes some contribution from the USNO star.\n comments: UT         dec.day      CR mag\n7:23:28    25.30796    18.0\n7:40:09    25.31955    18.2\n7:56:43    25.33105    18.3\n8:13:25    25.34265    18.3\n8:30:10    25.35428    18.3\n8:46:49    25.36584    18.6\n9:03:28    25.37741    19.0\n\nA FITS image has been uploaded to \nftp://ftp.aavso.org/grb/Dr.DouglasT.Durig_GRB050525_2453516.00275_.fits\n\nThe AAVSO thanks the Curry Foundation for their continued support of the \nAAVSO International High Energy Network.",
  "circularId": 3478,
  "createdOn": 1117030079000,
  "email": "aaronp@aavso.org",
  "subject": "GRB050525: Optical observations",
  "submitter": "Aaron Price at AAVSO  <aaronp@aavso.org>",
  "eventId": "GRB 050525"
}