GCN Circular 7318
Subject
GRB 080218b, SMARTS optical/IR limits
Event
Date
2008-02-19T03:55:24Z (18 years ago)
From
Bethany Cobb at Yale U <cobb@astro.yale.edu>
B. E. Cobb, part of the larger SMARTS consortium, reports:
Using the ANDICAM instrument on the 1.3m telescope at CTIO, we
obtained optical/IR imaging of the error region of GRB 080218b
(Schady et al. GCN 7314) with a mid-exposure time of ~3.1 hours
post-burst (2008-02-19 03:03 UT). Total summed exposure times amounted
to 18 minutes in I and 15 minutes in J.
No source is detected at the position of the X-ray
afterglow (Schady et al. GCN 7314) to approximate
limiting magnitudes of I > 21.1 and J > 18.7. Magnitudes
are calibrated using USNO-B1.0 values for I, and 2MASS
values for J.