GCN Circular 5536
Subject
GRB 060906: Swift-UVOT observations
Date
2006-09-06T18:31:26Z (18 years ago)
From
Patricia Schady at MSSL/Swift <ps@mssl.ucl.ac.uk>
P. Schady (MSSL-UCL) and J.L. Racusin (PSU) report on behalf of the
Swift-UVOT team:
The Swift UVOT began observing GRB 060906 152 seconds after the BAT
trigger (GCN 5528). No optical afterglow is detected at the 3-sigma level
in the XRT error circle (GCN 5528) or at the location of the afterglow reported
by Cenko et al. (GCN 5529) in individual or coadded exposures of any of the
UVOT filters.
The 3-sigma limiting magnitudes for the coadded images of the
UVOT filters are listed below:
Filter T_range(s) Exp(s) Upper limit (3sig)
WHITE 201-8121 583 20.6
V 457-7210 1297 20.1
B 739-8029 520 20.3
U 720-7824 529 20.0
W1 697-7619 549 19.6
M2 672-7415 549 19.9
W2 773-7006 320 19.7
where T_range is the start and end times of the coadded exposures. No
correction has been made for Galactic reddening along the line of sight
(E(B-V) = 0.20 mag).