GCN Circular 8827
Subject
GRB090118 Swift/UVOT upper limits
Date
2009-01-19T11:47:20Z (15 years ago)
From
Patricia Schady at MSSL/Swift <ps@mssl.ucl.ac.uk>
P. Schady (MSSL-UCL) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began white-band observations of the field of the
likely GRB candidate detected in the BAT Slew Survey (BATSS), GRB
090118 (Copete et al., GCN 8825) at 2009-01-018 20:55:35 UT, 25.3 ks
after the burst. We do not detect any new source within the Swift BAT
error circle (Copete et al., GCN 8825) in a co-added white-band image
down to the following 5-sigma upper limit:
Filter T_start T_stop Exp Mag
(ks) (ks) (s) (5-sigma upper limit)
-------------------------------------------------------------
white 25.3 35.3 1292 > 21.1
-------------------------------------------------------------
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E_(B-V) = 0.13 mag. All
photometry is on the UVOT photometric system described in Poole et al.
(2008, MNRAS, 383, 627).