{
  "bibcode": "1999GCN...209....1S",
  "body": "GRB990123 Optical Observation at SAO-RAS\n\nV. Sokolov, S. Zharikov (SAO-RAS) and L. Nicastro, M. Feroci, E. Palazzi\non behalf of the BeppoSAX team report:\n\nWe obtained an R-band image of the BeppoSAX localization of GRB990123\non 1999 Jan 24.076 UT, 16.04 hours after the GRB event, with the SAO-RAS\n6-m telescope.  The weather was cloudy.\nIn spite of that, in a 15-min exposure image we were able to see an\nobject at the position of the optical candidate suggested by Odewahn et al.\n(GCN #201).  We estimated a magnitude of 19.6 +/- 0.2 (using star 1 from\nGCN #204) and 19.9 +/- 0.2 (using star 2 from GCN #204).\nThese values include the contribution of the proposed underlying host\ngalaxy.  To have the contribution of the OT alone these value should be\nincreased by about 0.25 magnitudes.\n\nR = 19.9 +/- 0.2 is compatible with the power-law decay with index\n-1.5 found by Bloom et al. (GCN #208) as we would expect to find\nabout R = 20.1 using the R = 18.2 on Jan 23.565 UT and R = 21.3 for the\nunderlying galaxy (GCN #201).\n\nThis report may be cited.\n\n\n[GCN OP NOTE:  This circular was actually received at 12:40:01 UT, but was \ndelayed in distribution due to the submitter not having prior vetting.]",
  "circularId": 209,
  "createdOn": 917184363000,
  "email": "nicastro@ifcai.pa.cnr.it",
  "subject": "GRB990123, Optical observation",
  "submitter": "Luciano Nicastro at IFCAI-CNR  <nicastro@ifcai.pa.cnr.it>",
  "eventId": "GRB 990123"
}