GCN Circular 2193
Subject
GRB 030329 Optical Observations
Event
Date
2003-05-02T07:55:19Z (23 years ago)
From
Jens Hjorth at U.Copenhagen <jens@astro.ku.dk>
L. Kindt, H. H. Andersen and A. Jakobsen (University of Copenhagen) report:
We have obtained V, R and I-band images of the error box of GRB 030329
(Peterson & Price 2003, GCN 1985) using the Danish 0.4-m Brorfelde Schmidt
telescope. We compared our images with the Digitized Sky Survey and detected
the optical afterglow of GRB 030329 at:
RA: 10:44:50.03 Dec: +21:31:18.1 +- 0.5 arcsec (J2000)
The following table contains our data for this object:
Date Time(UT) Exposure time(s) Band Magnitude
--------------------------------------------------------------
Mar 29 20:21 1080 R 14.54+-0.01
Mar 29 20:58 600 R 14.57+-0.01
Mar 30 19:16 360 R 16.35+-0.05
Mar 30 19:30 540 R 16.35+-0.04
Mar 31 21:18 540 R 16.80+-0.04
Apr 7 21:00 270 R 19.24+-0.29
Apr 7 21:08 540 R 19.20+-0.18
Apr 7 21:45 1620 R 18.92+-0.13
Apr 7 22:26 1800 I 18.82+-0.14
Apr 7 23:06 1800 V 19.09+-0.14
--------------------------------------------------------------
Time is measured from start of observation.
The photometry of the afterglow is with respect to 11 stars from
Henden (GCN 2023). The quoted errors in the I and V bands may be
underestimated. We fitted a single power law to our data in the
R-band. We found a power law slope of 1.31 +- 0.04.
The combined images are made available at:
http://www.fys.ku.dk/~kindt/bachelor/
Thanks to J. Hjorth, K. Augustesen, and H. Pedersen.