{
  "bibcode": "2009GCN..9320....1R",
  "body": "V. Rumyantsev, K. Antoniuk (CrAO), A. Pozanenko (IKI) report on behalf of \nlarger GRB follow-up collaboration:\n\nWe observed the afterglow (Cannizzo et al. GCN 9223; Yuan GCN 9224) of  the \nSwift GRB 090424  (Trigger 350311; Cannizzo et al., GCN 9223) in R filter on \nApr. 24   (18:25:36 -- 19:23:38) and  Apr. 26 (19:57:14 -- 21:01:01) with \nAZT-11 telescope of CrAO.  We  detect the afterglow in  combined images of \nboth epochs. Astrometry of the afterglow is RA(J2000):  12 38 05.1 \nDec(J2000): +16 50 14.72   with uncertainty of 0.5 arcsec.\nPreliminary photometry of combined images is based on  USNO-B1.0 \n1068-0228255  star  RA=12:38:02.33  Dec=+16:51:10.0  is  following:\n\nT0+     Filter, Exposure, mag.,     err.\n(d)             (s)\n\n0.1972 R 20x180 19.27  +/-0.06\n2.2628 R 20x180 21.0   +/-0.2\n\nThe photometry is contaminated with possible host galaxy (Evans et al. GCN \n9226).\n\nThe combined image of the Apr. 24 observation can de found at\nhttp://grb.rssi.ru/GRB090424/GRB090424_AZT-11_R.gif",
  "circularId": 9320,
  "createdOn": 1241396485000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 090424: optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 090424"
}