[vsnet-grb-info 14254] GRB 131202A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15568
SUBJECT: GRB 131202A: Swift/UVOT Upper Limits
DATE:    13/12/03 12:56:44 GMT
FROM:    Samantha Oates at MSSL  <sro at mssl.ucl.ac.uk>

S. R. Oates (UCL-MSSL) and D. Kocevski (NASA/GSFC/ORAU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 131202A
117 s after the BAT trigger (Kocevski et al., GCN Circ. 15559).
No optical afterglow consistent with the XRT position
(Osborne et al., GCN Circ. 15564) 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 initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag
white_FC        117          267            147         >20.6
white           117	     1344           363         >21.2
v               608	     1231           78          >18.6
b               534	     1330           78          >19.6
u_FC            277	     527            246         >19.9
u               277	     1305           304         >20.1
w1              657	     1280           78          >19.0
m2              632	     1256           78          >18.9
w2              583	     1207           78          >19.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).