GCN Circular 8893
Subject
GRB 090205: Swift/UVOT Upper Limits
Date
2009-02-06T16:54:59Z (15 years ago)
From
Wayne Landsman at GSFC/SSAI <wayne.b.landsman@nasa.gov>
W. Landsman (NASA/GSFC) and M. Perri (ASDC) report on behalf of the
Swift UVOT team
The Swift/UVOT began settled observations of the field of GRB 090205 92s
after the BAT trigger (Perri et al., GCN 8884). We do not detect any
source at the enhanced Swift XRT position (Evans et al. GCN 8885) or at
the VLT optical candidate position (D'Avanzo et al. GCN 8887). The
UVOT non-detections are consistent with the spectroscopic redshift of
4.6 reported by Thoene et al. (GCN 8889). Our 3-sigma upper limits
are reported below.
Filter T_start T_stop Exp(s) Mag (3-sigma upper limit)
-------------------------------------------------------------
white 92 242 148 > 21.1
white 92 7633 824 > 21.9
v 580 12829 1234 > 20.7
b 506 34930 2073 > 21.7
u 250 500 246 > 20.5
u 298 18581 1660 > 21.4
uvw1 629 17668 1415 > 21.4
uvm2 604 23148 1882 > 21.4
uvw2 555 11915 1322 > 21.5
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E_(B-V) = 0.12 mag. All
photometry is on the UVOT photometric system described in Poole et al.
(2008, MNRAS, 383, 627).