GCN Circular 2070

Subject
GRB 030329: Additional Mt. Laguna Optical Observations
Event
Date
2003-04-02T02:19:50Z (23 years ago)
From
Jerome A. Orosz at San Diego State U <orosz@zwartgat.sdsu.edu>
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 1985Loading...
 
 ) 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 2056Loading...
 
 ).  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/