[vsnet-grb-info 12681] GRB 121202A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14041
SUBJECT: GRB 121202A: Swift/UVOT Upper Limits
DATE:    12/12/02 19:50:51 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 121202A
2828 s after the BAT trigger (Oates et al., GCN Circ. 14032).
No optical afterglow consistent with the XRT position
(Evans et al. GCN Circ. 14038)
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          2828         2978          147         >20.3
white             2828         5033          541         >21.0
v                 3808        16147         1205         >20.2
b                 3192        22680         1059         >20.9
u                 2987        28451         2637         >21.2
w1                4218        27811         2853         >21.4
m2                4012        26905         2713         >21.5
w2                3603        31934         1549         >21.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.05 in the direction of the burst
(Schlegel et al. 1998).