GCN Circular 3986
Subject
GRB050915: Swift/UVOT upper limits
Date
2005-09-15T20:42:37Z (19 years ago)
From
Alexander Blustin at MSSL-UCL <ajb@mssl.ucl.ac.uk>
A. J. Blustin (UCL-MSSL), D. Grupe (PSU), T. Poole (UCL-MSSL),
P. Roming (PSU), N. White (GSFC), D. Hinshaw (GSFC-SPSYS),
N. Gehrels (GSFC) report on behalf of the Swift-UVOT team:
The Swift/UVOT began observing the field of GRB050915 85 s
after the BAT trigger (Grupe et al. GCN 3977). No new source is
detected at the position of the refined XRT error circle (Grupe
et al. GCN 3983) in the initial 100 s V-band image down to a
3-sigma upper limit of 19.0, or in summed exposures with any of
the filters down to the following 3-sigma magnitude upper limits:
Filter T_range (s) Exp (s) 3sig UL
V 85-6154 1049 20.3
B 230-17031 324 20.6
U 216-12846 958 20.9
W1 203-11939 958 20.5
M2 188-6743 640 20.2
W2 246-677 59 19.6
The magnitudes are uncorrected for extinction.