TITLE:   GCN CIRCULAR
NUMBER:  22733
SUBJECT: GRB 180514A: Swift/UVOT Upper Limits
DATE:    18/05/15 06:58:41 GMT
FROM:    Alice Breeveld at MSSL-UCL  <a.breeveld@ucl.ac.uk>

A. A. Breeveld (UCL-MSSL) and S. J. LaPorte (PSU) report on behalf of 
the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180514A 87 
s after the BAT trigger (LaPorte et al., GCN Circ. 22723).
No optical afterglow consistent with the enhanced XRT position (Goad et 
al. GCN Circ. 22725) 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            87          237          147         >20.8
u_FC               300          549          246         >20.2
white               87         7353          688         >22.8
v                 6129         6329          197         >20.1
b                 5513         7148          393         >20.7
u                  300         6943          639         >21.6
w1                5104         6739          393         >20.8
m2                6334         6533          197         >20.1
w2                5924         7540          374         >20.3

The magnitudes in the table are not corrected for the Galactic 
extinction due to the reddening of E(B-V) = 0.01 in the direction of the 
burst (Schlegel et al. 1998).