GCN Circular 5156
Subject
GRB060512: Late-Time P200 Observations
Event
Date
2006-05-23T04:50:32Z (19 years ago)
From
S. Bradley Cenko at Caltech <cenko@srl.caltech.edu>
S. B. Cenko and W. H. Baumgartner (Caltech) report on behalf of a larger
collaboration:
We have imaged the field of GRB060512 (Cummings et al.; GCN 5117) with the
Large Format Camera mounted on the 5-m Palomar Hale Telescope.
Observations consisted of 5 x 180 s images in the r' filter taken at a
mean epoch of May 21.25 UT. At the location of the optical afterglow, we
detect an object with approximate r' magnitude 23.7 +/- 0.2 (calculated
with respect the SDSS calibration provided by Cool et al.; GCN 5120).
If we assume limited contamination from an underlying host galaxy, the
afterglow decay remains consistent with the early-time power-law index of
0.85 (Klotz et al.; GCN 5140), indicating a late jet-break time. However,
futher observations are required to verify the host galaxy brightness.