TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2070 SUBJECT: GRB 030329: Additional Mt. Laguna Optical Observations DATE: 03/04/02 02:19:50 GMT FROM: Jerome A. Orosz at San Diego State U J. Brodney Fitzgerald and Jerome A. Orosz (San Diego State University) report: We report additional observations of the field of GRB 030329 (Peterson & Price, GCN 1985) made with the 1 meter telescope at SDSU's Mount Laguna Observatory. Images were taken in the Bessell B, V, R, and I filters on the night of 2003 April 1 (UT) in photometric conditions. The data were reduced and calibrated in the same manner as previously reported (GCN 2056). Our observations are summarized in the 4 tables below. The CCD images of the GRB field and some Landolt fields are available upon request to orosz@sciences.sdsu.edu. The eclipsing binary we reported on previously had a small secondary eclipse (about 0.1 mag deep) centered near 8:15 on April 1 (UT). If the orbit is circular and if no eclipses were missed between March 31 and April 1, then the orbital period would be about 2.3 days. Our GRB observations follow: Table 1: B Observations: date-obs at start exptime mag err (sec) ------------------------------------------------- 2003-04-01T03:34:38.20 360.000 17.703 0.009 2003-04-01T04:02:57.00 300.000 17.719 0.009 2003-04-01T06:09:32.80 300.000 17.814 0.009 2003-04-01T06:35:53.40 300.000 17.831 0.010 Table 2: V Observations: date-obs at start exptime mag err (sec) ------------------------------------------------- 2003-04-01T03:42:54.40 360.000 17.2512 0.009 2003-04-01T04:08:36.40 300.000 17.2642 0.008 2003-04-01T06:21:45.30 240.000 17.3562 0.011 2003-04-01T06:41:38.50 180.000 17.3622 0.012 2003-04-01T08:04:22.70 240.000 17.4552 0.012 2003-04-01T08:19:48.70 240.000 17.4252 0.011 2003-04-01T08:32:34.30 180.000 17.4332 0.014 2003-04-01T09:29:10.60 240.000 17.4402 0.014 2003-04-01T09:43:29.20 300.000 17.4732 0.014 2003-04-01T10:02:22.20 300.000 17.4702 0.018 2003-04-01T10:20:19.60 300.000 17.4572 0.027 Table 3: R Observations: date-obs at start exptime mag err (sec) ------------------------------------------------- 2003-04-01T03:49:27.80 360.000 16.866 0.008 2003-04-01T04:14:10.50 300.000 16.861 0.007 2003-04-01T06:26:24.20 240.000 16.948 0.010 2003-04-01T06:45:24.30 180.000 16.970 0.011 2003-04-01T08:09:57.70 240.000 17.005 0.011 2003-04-01T08:24:45.80 180.000 17.001 0.011 2003-04-01T08:36:10.50 180.000 17.018 0.012 2003-04-01T09:34:02.60 240.000 17.061 0.013 2003-04-01T09:49:12.30 300.000 17.062 0.014 2003-04-01T10:08:02.00 300.000 17.082 0.017 2003-04-01T10:26:06.80 300.000 17.065 0.019 Table 4: I Observations: date-obs at start exptime mag err (sec) ------------------------------------------------- 2003-04-01T03:56:03.40 360.000 16.4346 0.009 2003-04-01T04:19:46.20 300.000 16.4386 0.011 2003-04-01T06:30:57.60 240.000 16.5396 0.013 2003-04-01T06:49:05.10 180.000 16.5636 0.013 2003-04-01T08:15:29.10 180.000 16.5816 0.015 2003-04-01T08:28:55.70 180.000 16.5746 0.016 2003-04-01T08:39:51.10 180.000 16.5726 0.015 2003-04-01T09:38:45.20 240.000 16.6346 0.019 2003-04-01T09:55:58.10 300.000 16.6586 0.020 2003-04-01T10:14:17.10 300.000 16.6826 0.027 2003-04-01T10:31:37.20 300.000 16.6636 0.025 ------------------------------------------------------------------------- Jerome A. Orosz Assistant Professor of Astronomy, San Diego State University 5500 Campanile Drive, San Diego, CA 92182-1221 (619) 594-7118 (office), 594-6182 (dept. secretary), 594-1413 (dept. fax) http://mintaka.sdsu.edu/faculty/orosz/web/