GCN Circular 11683
Subject
Swift/UVOT observations of GRB110208a
Event
Date
2011-02-09T19:16:17Z (15 years ago)
From
Massimiliano de Pasquale at MSSL-UCL <mdp@mssl.ucl.ac.uk>
M. De Pasquale (MSSL-UCL) and V. D'Elia (ASI-ASDC) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 110208a 85s
s after the BAT trigger (D'Elia, GCN Circ. 11674). No optical afterglow
consistent with the enhanced XRT position (Evans et al, GCN Circ. 11678)
or the Magellan position (Berger et al., GCN Circ. 11681) is detected in
the initial UVOT exposures or in the summed ones.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC)
exposures and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 85 240 147 >20.6
white 85 18443 1425 >21.5
u_FC 298 548 246 >20.0
u 298 30010 3111 > 21.2
v 628 11030 1190 >20.0
b 553 24229 2021 >21.4
w1 703 29283 2919 >21.3
m2 652 28376 1771 >21.1
w2 603 6810 393 >20.5
We note that there is a bright galaxy a few arcminutes from
the GRB position.
The values quoted above are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.02 in the
direction of the burst (Schlegel et al. 1998).