GCN Circular 7577
Subject
UVOT/Swift Observations of GRB080408
Event
Date
2008-04-09T11:20:42Z (18 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 performed a Target of Opportunity observation on the SuperAGILE
GRB 080408 (Soffitta et al., GNCN Circ. 7571), starting ~7hrs after the
trigger. Observations were made in the b, u and uvw1 filters. The optical
afterglow is not detected in any of these filters at the XRT position (Page et
al., GCN Circ 7576) down to the following 3 sigma upper limits:
Filter Tstart Exp Mag UL (3sig)
(hrs) (s)
b 7.12 185 > 19.96
u 7.06 200 > 19.63
uvw1 6.95 399 > 19.97
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E(B-V)=0.04 mag (Schlegel et al., 1998, ApJS,
500, 525). The photometry is on the UVOT flight system described in Poole et
al. (2008, MNRAS, 383, 627).