[vsnet-grb-info 3035] GRB 060313, SMARTS optical counterpart?

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4872
SUBJECT: GRB 060313, SMARTS optical counterpart?
DATE:    06/03/13 04:49:22 GMT
FROM:    Bethany Cobb at Yale U  <cobb at astro.yale.edu>

B. E. Cobb, part of the larger SMARTS consortium, reports:

Following the report of a possible X-ray afterglow to GRB 060313,
the SMARTS imaging described in GCN 4869 was re-examined.   
The X-ray position is unfortunately outside our NIR imaging. In our
R and I band images, however, there is a possible optical counterpart
within the X-ray detection error region, at preliminary coordinates of:
RA = 4:26:28.45
Dec = -10:50:39.9
The source is only detected at the 1 sigma level, but the fact
that it is visible in both R and I suggests the source is not
spurious.  The source is not detected in the DSS images.
In comparison with several nearby USNO-B1.0 stars, the
source has a magnitude of R ~ 19.9 +/- 0.3.