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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2193 SUBJECT: GRB 030329 Optical Observations DATE: 03/05/02 07:55:19 GMT 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.
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