GCN Circular 36
Subject
GRB980329 optical observations
Date
1998-04-01T13:55:07Z (27 years ago)
From
Sylvio Klose at TLS_Tautenburg <klose@tls-tautenburg.de>
S. Klose, H. Meusinger & H. Lehmann (Thueringer Landessternwarte Tautenburg,
Germany) report:
The error box of GRB 980329 was imaged in V, R & I on March 29.8 - 30.0 UT,
and in R and I on March 31.8 - 31.9 UT, using the Tautenburg Schmidt
telescope equipped with the Schmidt focus CCD camera. Further R-band images
were obtained on March 31.8 UT with the 2.2-m telescope at Calar Alto, Spain,
equipped with CAFOS.
A comparison of these images shows no object in the final 1-arcmin GRB error
box for which the R-magnitude has declined by more than about 0.5 mag.
Based on this finding it seems that the magnitude of the GRB afterglow
was R > 20 about 15 hours after the burst (or the magnitude of the optical
afterglow did not notably vary over this time span).
R-band images (gif-files) taken on March 29.85 and 30.0 UT are available
via anonymous ftp from
ftp.tls-tautenburg.de
in the directory /pub/klose.
Further images will be make available, when deeper I-band images are obtained.
Comments are welcome.