{
  "bibcode": "2003GCN..2160....1I",
  "body": "M.A. Ibrahimov, I.M. Asfandiyarov, B.B. Kahharov (Ulugh Beg Astronomical\nInstitute of the Uzbek Academy of Sciences), A.Pozanenko (IKI), V.Rumyantsev\n(CrAO), G.Beskin (SAO)  on behalf of large collaboration report:\n\nWe have observed the OT GRB030329 found by B.Peterson and P.Price (GCN 1985)\nusing 1.5m telescope of Mt.Maidanak High-altitude Observatory.    Several\nBVRI Bessel images were obtained on April, 7,9,10 and 20. The seeing on\nApr.7 was in range of 1-1.5 arcsec, on Apr.10 - 0.9-1 arcsec for R and in\n1-1.3 arcsec for B. In Apr. 9 the weather was unfavorable and some images\nwere obtained trough clouds.  Based on filed photometry still by A. Henden\n(GCN 2023) we estimate the OT magnitudes:\n\nMid time\nUT, Apr. exposure filter mag    err\n\n 7.7819  7x600    B      19.78  0.04\n 7.7986  5x600    V      19.20  0.03\n 7.7771  8x600    R      18.84  0.03\n 7.8160  3x600    I      18.44  0.06\n 9.7653  2x600    B      20.07  0.14\n 9.7813  2x600    V      19.37  0.08\n 9.7729  4x600    R      19.10  0.06\n10.7625  6x600    B      19.96  0.08\n10.7792  6x600    V      19.56  0.06\n10.7354  6x600    R      19.29  0.07\n10.7792  4x600    I      19.11  0.08\n\nAnd  preliminary reduction of measurements on Apr.20 is following\n\nUT, Apr. exposure filter mag\n\n20.6444  2x600    R      19.92\n20.6604  2x600    B      21.08\n\nWith typical error of 0.15 (B) and 0.13 (R)\n\nOur measurements on Apr. 10 are consistent with TNG observation by V. Testa\net al. (GCN 2141).   While in Apr. 7 - 10 the brightness of OT  is\nconsistent with slow fading, we could not detect brightness change in R\n(within our accuracy) between observation on Apr.14 (GCN 2141) and our\nmeasurement on Apr. 20.",
  "circularId": 2160,
  "createdOn": 1050965178000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB030329, optical observation",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 030329"
}