[vsnet-grb-info 3698] GRB 060906: KAIT observations

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5532
SUBJECT: GRB 060906: KAIT observations
DATE:    06/09/06 11:04:31 GMT
FROM:    Weidong Li at UC Berkeley KAIT/LOSS  <weidong at astron.berkeley.edu>

W. Li and J. Bloom (University of California, Berkeley), on behalf
of the KAIT GRB team, report:

The robotic 0.76-m Katzman Automatic Imaging Telescope (KAIT)
at Lick Observatory observed GRB 060906, detected with Swift
(Trigger 228316; Racusin et al. GCN 5528). The automatic sequence
started at 08:34:32, 106 s after the burst. In a 15 s unfiltered 
image, no afterglow candidate is detected to a limiting magnitude
of 18.2 (from comparison with the USNO B1.0 catalog). We detected
the optical afterglow reported by Cenko et al. (GCN 5529, 5531)
in a 45 s unfiltered image started at 336 s after the burst, with
the following precise (+/- 0.2") position:

RA = 2:43:00.84   Dec = +39:21:41.9 (J2000.)

A table of photometry (3-sigma limits and detections) is reported
below. 

======================================================================

Start UT   t(GRB)   Filter    Exp(s)  3sigma-limit       detection 

08:34:32    106s    clear     15.0     <18.2
08:35:07    141s    V         15.0     <16.7
08:35:33    167s    I         15.0     <17.5
08:35:59    193s    clear     20.0     <18.4
08:36:30    224s    V         45.0     <17.3
08:37:27    281s    I         45.0     <18.3
08:38:22    336s    clear     45.0                          18.9 +/- 0.3

========================================================================