GCN Circular 6861
Subject
GRB 071010: Keck Observations of the Afterglow
Date
2007-10-10T05:37:15Z (17 years ago)
From
Josh Bloom at UC Berkeley <jbloom@astron.berkeley.edu>
J. S. Bloom, D. A. Perley, M. Modjaz, D. Poznanski (UC Berkeley), H.-
W. Chen (U Chicago), and J. X. Prochaska (UCSC) report:
"We have conducted preliminary imaging with the Keck I telescope
(+LRIS) of the afterglow seen in TAROT (Klotz et al. GCN 6860) of GRB
071010 (Moretti et al. 6859). In the first set of short exposures
(~100 sec) in R and G bands (starting at 04:48:34 UT) we detect a
source near that position with a magnitude comparable to the faintest
detectable DSS sources (corresponding to R~20 - 21 mag). We report a
refined position (+/- 300 mas relative to USNO B1.0):
ra= 19:12:14.624 dec= -32:24:07.16 J2000
The offset from the star at 19:12:17.121, -32:24:18.65 to the
afterglow is 31.62" W, 11.49 "N. Spectroscopy is underway and reports
from that analysis are forthcoming (the continuum is detected to the
atmospheric cutoff in the blue, implying z<~2)."
This message may be cited.
We thank A. Klotz for helpful conversations regarding the TAROT
afterglow detection.