GCN Circular 2275
Subject
GRB 030528: Infrared Observations and the Proposed IR Counterpart
Date
2003-06-06T23:49:59Z (21 years ago)
From
George Djorgovski at Caltech/Palomar <george@astro.caltech.edu>
GRB 030528: Infrared Observations and the Proposed IR Counterpart
M. Bogosavljevic, A. Mahabal, and S. G. Djorgovski (Caltech),
report on behalf of the Caltech-NRAO-CARA GRB collaboration:
On June 3, 2003, 08:30 UT we observed the field of the tentative
near-IR afterglow of GRB 030528 (Greiner et al, GCN 2271), using
the WIRC camera at the Palomar 200-inch Hale telescope. A total
of 30 min on-source exposure was obtained in the Ks band. The
average seeing was ~1.0".
The proposed afterglow of GRB 030528, Chandra source #1
(CXOU J170400.3-223710, Butler et al., GCN 2269) is not detected
down to our 3-sigma detection limit of Ks~19.5, indicating a
continued fading (see Greiner et al, GCN 2271), and strengthening
its interpretation as the afterglow of GRB 030528.
Our 8x8 arcmin FOV also covers Chandra sources #4, #9, #10, all
of which are within the SXC revised error region. All three are
detected. IR images and magnitude estimates will be placed at:
http://www.astro.caltech.edu/~milan/GRB030528/
The field also includes Chandra sources #3, #5, #8, #14, #15 and
#17, from the additional list outside the SXC error region
(Butler et al., GCN 2269 and ref. therein).
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