[vsnet-grb-info 14423] GRB 140114A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15737
SUBJECT: GRB 140114A: Swift/UVOT Upper Limits
DATE:    14/01/14 22:18:03 GMT
FROM:    Massimiliano de Pasquale at MSSL-UCL  <m.depasquale at ucl.ac.uk>

M. De Pasquale (UCL-MSSL) and E. Troja (NASA/GSFC/UMCP)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140114A
120 s after the BAT trigger (Troja et al., GCN Circ. 15728).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 15733) is detected in the initial UVOT
exposures and following summed 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           120          270          147         >20.9
u_FC               278          528          246         >20.2
white              120         1701          411         >21.2
v                  608         1404           97         >18.8
b                  534         1330           78         >19.6
u                  278          528          246         >20.2
w1                 658         1626          117         >19.3
m2                 633         1429           58         >18.6
w2                1013         1379           39         >18.6

The magnitudes in the table 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).