GCN Circular 2486
Subject
GRB 031203: SMARTS optical monitoring
Date
2003-12-11T21:50:29Z (20 years ago)
From
Charles Bailyn at Yale/Astro <bailyn@astro.yale.edu>
C. Bailyn, P. van Dokkum, M. Buxton, B. Cobb (Yale) and
J. S. Bloom (Harvard/CfA) report continued monitoring
of the galaxy near the position of GRB 031203 (GCN 2482)
with the SMARTS 1.3m telescope + ANDICAM instrument at
CTIO:
"We have continued SMARTS/ANDICAM observations of the galaxy
coincident with the radio position (GCN 2473) of GRB 031203.
We are obtaining 42m of exposure time in I and J each night.
Our recent I-band data suggest that the galaxy has brightened
by 0.09 +/- 0.03 magnitudes over the past 2 nights, reaching I=19.13
in observations beginning Dec. 11 UT=5:27 (in addition to the
error in the differential magnitude, there is also an uncertainty
of ~0.05 in the absolute magnitude scale). This brightening may
mark the emergence of an underlying supernova, so we urge continued
observation of this source in all wavelengths."