GCN Circular 10242
Subject
GRB 091202: Swift/UVOT Upper Limits
Date
2009-12-03T16:34:23Z (14 years ago)
From
Alice Breeveld at MSSL-UCL <aab@mssl.ucl.ac.uk>
A. Breeveld (MSSL/UCL) and L. Vetere (PSU) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 091202
2363 s after the Integral trigger (Mereghetti et al., GCN Circ.
10234). No new sources are found at the XRT position (Vetere et al.,
GCN Circ. 10239) in the initial UVOT exposures. Preliminary 3-sigma
upper limits using the UVOT photometric system (Poole et al. 2008,
MNRAS, 383, 627) for the initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 3120 3869 738 >21.7
v 3876 4357 473 >19.5
u 2363 3113 738 >20.9
The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.051 in the direction of the burst
(Schlegel et al. 1998).