GCN Circular 5219
Subject
GRB060604: Swift/UVOT detections
Date
2006-06-05T14:25:51Z (18 years ago)
From
Alexander Blustin at MSSL-UCL <ajb@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 observing the field of GRB060604 at 18:20:39
on 2006-06-04, 100 s after the BAT trigger (Page et al., GCN 5212).
The afterglow candidate at the position reported by Page et al.
(GCN 5212) was detected at greater than 2 sigma significance in the
V, B, U, UVW1 and White filters. Magnitudes and 3-sigma upper limits
from co-added images in the colour filters, and from two single
images in the White filter, are given below. The weak detection in
the UVW1 band is consistent with the tentative redshift of 2.68
reported by Castro-Tirado et al. (GCN 5218).
Filter T_range(s) Exposure(s) Mag/3sig_UL Significance (sigma)
V 100-10165 1127 21.2 +/- 0.6 2.4
B 4086-23420 1956 21.2 +/- 0.2 5.8
U 3881-29206 2705 21.1 +/- 0.2 4.4
UVW1 3677-28601 2900 22.1 +/- 0.4 2.8
UVM2 3472-27694 2139 21.1 (3sig_UL)
UVW2 4496-6061 321 19.8 (3sig_UL)
White 117-217 98 18.3 +/- 0.1 13.4
White 4290-4490 190 20.5 +/- 0.3 3.9
These magnitudes are uncorrected for Galactic extinction
(E(B-V) = 0.043).