GCN Circular 2334

Subject

GRB030725, optical transient observations

Event

Date

2003-07-29T15:09:42Z (22 years ago)

From

Arne A. Henden at USNO/USRA <aah@nofs.navy.mil>

B. Monard (Bronberg Obs.) reports on behalf of the AAVSO
International GRB network:

Additional observations of the HETE GRB030725 (=H2779; Shirasaki et al.,
GCN 2322Loading...
 
 ) error circle were made with the Bronberg 0.30m telescope
and unfiltered CCD.  Many 45-second exposures with UT midpoint
of 030728.724 were stacked, with a limiting magnitude
of about 21CR (based on USNO-A red magnitudes).

The candidate optical transient located at
      20:33:59.49  -50:40:56.0 J2000
that was reported by Monard (GCN 2324Loading...
 
 ) has now faded below our
detection limit.  This strengthens the assertion that this is the
optical afterglow from GRB030725.  The 030728 fits image will be
uploaded to ftp://ftp.aavso.org/grb/GRB030725 later today.

We encourage observations by other sites.

  The AAVSO International GRB network is greatful for a generous grant from
the Curry Foundation and to NASA for the financial support for the High
Energy Workshops for Amateur Astronomers.