[vsnet-grb-info 7255] GRB090118 Swift/UVOT upper limits
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Mon Jan 19 20:47:27 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 8827
SUBJECT: GRB090118 Swift/UVOT upper limits
DATE: 09/01/19 11:47:20 GMT
FROM: Patricia Schady at MSSL/Swift <ps at 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).
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