[vsnet-grb-info 12853] GRB 130211A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14199
SUBJECT: GRB 130211A: Swift/UVOT Upper Limits
DATE:    13/02/11 21:58:48 GMT
FROM:    Samantha Oates at MSSL  <sro at mssl.ucl.ac.uk>

S. R. Oates (MSSL-UCL) reports on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 130211A
125 s after the BAT trigger (Oates et al., GCN Circ. 14195).
No optical afterglow consistent with the optical position
(Knust et al. GCN Circ. 14196) is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           125          275          147         >21.8
white              125        17061         1076         >22.9
v                 4470        22933         1646         >21.7
b                 3854        16303         1278         >22.4
u                  284        29091          650         >21.3
w1                4880        28760         1082         >21.8
m2                4674        27853         1175         >21.6
w2                4265        22020         1968         >22.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.53 in the direction of the burst
(Schlegel et al. 1998).