[vsnet-grb-info 3393] GRB060605: Swift/UVOT detections

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5228
SUBJECT: GRB060605: Swift/UVOT detections
DATE:    06/06/06 11:50:44 GMT
FROM:    Alexander Blustin at MSSL-UCL  <ajb at mssl.ucl.ac.uk>

A. J. Blustin (UCL-MSSL) and M. J. Page (UCL-MSSL) report on behalf
of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB060605
at 18:17:21 on 2006-06-05, 97 s after the BAT trigger (Page et al.,
GCN 5221). An optical afterglow was detected at (RA,DEC) (J2000) of
(21h28m37.32s,-06o03'31.3") with a 1-sigma error radius of about
0.5 arcsec, in the V, B and White filters, which is consistent
with the redshifts of 3.8 (Peterson et al., GCN 5223) or 3.7
(Still et al., GCN 5226) already reported for this GRB.
Magnitudes and three-sigma upper limits are as follows:

Filter   T_range(s)   Exp(s)  Mag/3sig_UL
V        202-595      386     16.53 +/- 0.04
V        10172-10471  291     19.0  +/- 0.2

B        4388-4588    190     20.0 +/- 0.2
B        23023-23322  287     21 +/- 1

U        4184-23017   2140    21.1 (3sig_UL)
UVW1     3979-22104   2030    20.2 (3sig_UL)
UVM2     3774-11377   1267    20.7 (3sig_UL)
UVW2     4798-6381    338     19.9 (3sig_UL)

White    97-197       98      17.64 +/- 0.06
White    17477-17776  291     20.5 +/- 0.3

These values are not corrected for the estimated Galactic
extinction of E(B-V) = 0.049.