GRB 030723
GCN Circular 2312
Subject
GRB030723, optical observations
Date
2003-07-23T21:38:26Z (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:
Observations of the HETE XRF/GRB030723 (triger 2777) error circle
were made with the Bronberg 0.30m telescope + unfiltered CCD.
Ten 45-second exposures with UT midpoint of 030723.806 (12.9hrs
after the burst) were stacked, with a limiting magnitude
of 20.5CR (based on USNO-A red magnitudes). No new object
is seen down to approximately CR=20.0 when comparing against
a DSS2-red image.
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.
GCN Circular 2325
Subject
GRB030723: Upper limits from historical observations
Date
2003-07-26T06:44:24Z (22 years ago)
From
Michael Wood-Vasey at UC Berkeley/LBNL/SNfactory <wmwood-vasey@lbl.gov>
GRB030723: Upper limits from historical observations.
W. M. Wood-Vasey, Lawrence Berkeley National Laboratory, using images
obtained by R. Bambery, S. Pravdo, M. Hicks, and K. Lawrence
(Near-Earth Asteroid Tracking project, Jet Propulsion Laboratory),
reports historical upper limits for the optical transient for
GRB 030723 of Fox et. al (GCN #2323) from images taken with the
Palomar Oschin 1.2-m telescope from 2001 Aug 30 -- 2002 Sep 9.
A co-addition of these images (taken 2001 Aug 30, Oct 8, 2002 Jul 29,
Aug 13, Aug 20, Sep 9) shows nothing at this location to a combined
limiting unfiltered magnitude of 21.62 (S/N = 3).
The co-addition is available at:
http://supernova.lbl.gov/~wwoodvas/GRB/#GRB030723
The quoted magnitude represents a calibration of the unfiltered NEAT
observations to the observed stars in the 0.25 sq. deg field of the
component images to the "red" USNO-A1.0 catalog.
This message may be cited.
All dates UT.