[vsnet-grb-info 5188] GRB 071010A: Continued Keck Imaging
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri Oct 12 00:11:33 JST 2007
TITLE: GCN CIRCULAR
NUMBER: 6885
SUBJECT: GRB 071010A: Continued Keck Imaging
DATE: 07/10/11 15:11:26 GMT
FROM: Daniel Kocevski at UC Berkeley <kocevski at berkeley.edu>
D. Kocevski, D. A. Perley, and M. Modjaz (UC Berkeley) report:
Beginning at 04:47:42 UT (2007-10-11) we began a second series of
imaging on the field of GRB 071010A (GCN 6733) using the Keck I
telescope (+LRIS). We acquired 6 images with an effective exposure
of 270s in R band and 360s in V band.
The optical afterglow (GCN 6860) is still detected and has faded
since our previous imaging epoch (GCN 6872). Preliminary aperture
photometry of the source indicates that it has faded by 0.55
magnitudes since our previous imaging. Using the same calibration
system as in our previous circular, we estimate a preliminary
magnitude of R=19.42
More information about the vsnet-grb-info
mailing list