{
  "bibcode": "2003GCN..2091....1L",
  "body": "V. Lipunov, A. Krylov, V. Kornilov, G. Borisov, D. Kuvshinov, A. Belinski,\nI. Chilingarian, M. Kuznetsov, S. Potanin, V. Vitrischak, G. Antipov\n\nSternberg Astronomical Institute, Alexsandr Krylov Observatory, Moscow\n\nreport:\n\nThe OT of GRB030329 (Peterson and Price, GCN 1985) was observed by MASTER\nsystem (Lipunov et al., GCN 2002, GCN 2035). Here we represent pre-final\nlight curve of the OT. We used more than 200 direct images to obtain field\nphotometry. Several groups of images were summarized to achieve better\nS/N ratio and smaller uncertanities of measurements. As the final result, we\nrepresent 64 points. Magnitude calibration was made according to the data,\npresented in GCN 2023 (A. Henden). 4 stars were used to do the calibration.\n\nBig uncertanities of magnitude measurements are caused by weather\nconditions. First points were made just after sunset on the blue sky, last\npoints were made through cirruses near the horizont.\n\nFrom these data we obtained new power law flux decreasing during\n8 hours of observations (t-t0 from 5.2h to 13.5h):\n\nF ~ t^(-alpha), alpha=1.22+-0.03\nRmag = 15.8 + 1.2*2.5*log(age in days)\n\nNew light curve plots available at old locations:\nhttp://observ.pereplet.ru/images/GRB030329_R_lc.gif\nhttp://www.sai.msu.su/~chil/GRB030329_R_lc.ps\n\n  date       UT      t-t0,hrs       R    errR\n03/29/2003 16:51:49   5.24691    13.744  0.417\n03/29/2003 16:54:27   5.29080    13.934  0.409\n03/29/2003 17:02:12   5.41997    13.702  0.226\n03/29/2003 17:07:36   5.50997    14.012  0.211\n03/29/2003 17:12:04   5.58441    13.708  0.164\n03/29/2003 17:14:29   5.62469    13.854  0.151\n03/29/2003 17:19:18   5.70497    13.983  0.097\n03/29/2003 17:34:11   5.95302    14.118  0.172\n03/29/2003 17:36:19   5.98858    13.908  0.103\n03/29/2003 17:40:01   6.05024    13.972  0.101\n03/29/2003 17:42:44   6.09552    14.043  0.079\n03/29/2003 17:46:24   6.15663    14.004  0.081\n03/29/2003 17:49:09   6.20247    14.007  0.078\n03/29/2003 17:52:18   6.25497    13.971  0.083\n03/29/2003 17:55:22   6.30608    13.943  0.073\n03/29/2003 17:59:49   6.38024    14.092  0.085\n03/29/2003 18:11:56   6.58219    14.007  0.125\n03/29/2003 18:21:10   6.73608    14.126  0.111\n03/29/2003 18:40:45   7.06247    14.180  0.083\n03/29/2003 18:43:29   7.10802    14.145  0.085\n03/29/2003 18:46:06   7.15163    14.090  0.083\n03/29/2003 18:48:46   7.19608    14.169  0.085\n03/29/2003 18:51:23   7.23969    14.147  0.087\n03/29/2003 18:54:06   7.28497    14.128  0.085\n03/29/2003 18:56:48   7.32997    14.254  0.088\n03/29/2003 18:59:29   7.37469    14.175  0.084\n03/29/2003 19:02:06   7.41830    14.231  0.089\n03/29/2003 19:04:48   7.46330    14.141  0.080\n03/29/2003 19:07:29   7.50802    14.325  0.098\n03/29/2003 19:12:54   7.59830    14.216  0.101\n03/29/2003 19:15:32   7.64219    14.261  0.098\n03/29/2003 19:18:10   7.68608    14.070  0.088\n03/29/2003 19:21:27   7.74080    14.168  0.121\n03/29/2003 19:52:30   8.25830    14.395  0.108\n03/29/2003 19:55:12   8.30330    14.375  0.105\n03/29/2003 19:58:05   8.35136    14.450  0.101\n03/29/2003 20:00:50   8.39719    14.431  0.110\n03/29/2003 20:03:42   8.44497    14.336  0.094\n03/29/2003 20:08:30   8.52497    14.499  0.097\n03/29/2003 20:11:15   8.57080    14.318  0.100\n03/29/2003 20:14:05   8.61802    14.463  0.100\n03/29/2003 20:16:50   8.66386    14.324  0.093\n03/29/2003 20:19:28   8.70774    14.432  0.099\n03/29/2003 20:24:45   8.79580    14.440  0.061\n03/29/2003 20:36:35   8.99302    14.541  0.075\n03/29/2003 20:41:20   9.07219    14.515  0.075\n03/29/2003 20:45:58   9.14941    14.437  0.074\n03/29/2003 20:51:17   9.23802    14.514  0.080\n03/29/2003 20:56:44   9.32886    14.644  0.092\n03/29/2003 21:01:30   9.40830    14.578  0.092\n03/29/2003 21:07:22   9.50608    14.458  0.087\n03/29/2003 21:17:37   9.67691    14.557  0.079\n03/29/2003 21:28:18   9.85497    14.604  0.079\n03/29/2003 21:39:07  10.03524    14.740  0.078\n03/29/2003 21:49:59  10.21636    14.616  0.065\n03/29/2003 22:03:48  10.44663    14.698  0.070\n03/29/2003 22:16:04  10.65108    14.493  0.068\n03/29/2003 22:26:44  10.82886    14.719  0.080\n03/29/2003 22:41:42  11.07830    14.632  0.089\n03/29/2003 23:03:55  11.44858    14.854  0.113\n03/29/2003 23:35:46  11.97941    14.905  0.117\n03/30/2003 00:04:04  12.45108    14.859  0.090\n03/30/2003 00:23:25  12.77358    14.837  0.129\n03/30/2003 00:52:04  13.25108    15.064  0.162\n03/30/2003 01:12:16  13.58774    15.002  0.161\n03/30/2003 01:35:52  13.98108    15.594  0.413\n\nWe thank Sergey M. Bodrov (general director of optical company \"Ochkarik\")\nfor financial and equipment support of MASTER research project.\n\nThis message may be cited.",
  "circularId": 2091,
  "createdOn": 1049463698000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB030329: final R-band light curve by MASTER",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 030329"
}