TITLE:   GCN CIRCULAR
NUMBER:  16572
SUBJECT: GRB 140710A: Swift/UVOT Upper Limits
DATE:    14/07/10 20:28:33 GMT
FROM:    Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>

S. R. Oates (IAA-CSIC/UCL-MSSL) and M. H. Siegel (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140710A
103 s after the BAT trigger (Siegel et al., GCN Circ. 16563).
No optical afterglow consistent with the optical position
(Delvaux et al., GCN Circ. 16566, Tanga et al., GCN Circ. 16565) or the enhanced XRT position 
(Osborne et al., GCN Circ. 16569) 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           103          253          147         >20.1
u_FC               315          565          246         >19.2
white              103         5830          363         >20.7
v                  644        16380         1090         >19.8
b                  570        12165          806         >20.3
u                  315        11556         1376         >20.5
w1                4153        17926         1706         >20.7
m2                3948        17285         1245         >20.8
w2                 620         6035          216         >19.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.06 in the direction of the burst
(Schlegel et al. 1998).