{
  "bibcode": "2005GCN..4023....1D",
  "body": "D. T. Durig (Cordell-Lorenz Observatory - University of the South) and A.  \nPrice (AAVSO) report on behalf of the AAVSO International High Energy\nnetwork on optical observations of GRB050922C.\n\nAfter glow reported by Rykoff et al (GCN #4011) was visible in 2 hours of\nexposures. The first three measurements are below and a link to the rest\nis in the full report at the bottom of the e-mail. Uncertainty is\nestimated at +/-0.2 mag.\n\n 09 23.03833 19.1 Rc\n 09 23.07725 19.5 Rc\n 09 23.10989 20.1 Rc\n\n The AAVSO would like to thank the Curry Foundation and NASA for their\nsupport of the AAVSO International High Energy Network.\n\n Name: Dr. Douglas T. Durig\n email: ddurig@sewanee.edu\n Observer: D. T. Durig, K. T. Crockett, L. R. Johnson\n Site: Cordell-Lorenz Observatory\n Location: Sewanee, TN, USA\n LatitudeLongitude: 35 12 N 85 55 W\n Elevation: 600 m\n Scope: SCT 0.30 m\n ScopeFocalRatio: f/5.9      1770 mm\n CCDVendor: SBIG ST-8E\n CCDDetector: KAF-1600E\n CCDSize: 1530x1020 binned 3x3 for 510x340\n CCDPixelScale: 3.14 arc sec per pixel\n CCDFOV: 26.7x17.8 full, 13.3x8.9 cropped submitted\n Object: GRB050922C\n ObsDate: 2005 09 23\n ObsMidPointTime: 01:51:14 UT\n TimePerFrame: 300 sec\n NumberOfFrames: best 24 out of 30\n Filters: CR\n Processing: dark,flat, register,co-add, 1/2 frame crop\n Seeing: 5-6 arc sec\n LimitingMag: ~21.5 ???\n Sky: clear, but very gusty winds\n afterglowmag: 19 fading to 20 over two hours time\n afterglowerr: 0.2 mag\n compstars: 94 UCAC, 188 B1.0 subframe\n Report: Full frame covers entire error box. After glow reported by Rykoff et al (GCN 4011) was visible in single 300 sec exposure but 6 frames were added to improved S/N for measurements. We measure a position of \n21 09 33.10 -08 45 30.2 \nFirst three photometric measurements shown below.\nWe have posted our first 2 hours of exposure at http://arthur.sewanee.edu/obsv/view.php\n\n comments: 09 23.03833 21 09 33.10 -08 45 30.2 19.1 R \n09 23.07725 21 09 33.12 -08 45 30.4 19.5 R      \n09 23.10989 21 09 33.12 -08 45 30.7 20.1 R      \n\nA FITS image has been uploaded to ftp://ftp.aavso.org/grb/Dr.DouglasT.Durig_GRB050922C_2453636.66853_.fits",
  "circularId": 4023,
  "createdOn": 1127450590000,
  "email": "aaronp@aavso.org",
  "subject": "GRB050922C: Optical Observations",
  "submitter": "Aaron Price at AAVSO  <aaronp@aavso.org>",
  "eventId": "GRB 050922C"
}