NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 181126d16h59m08s181461usUT
NOTE: Source region spec. is: 152.34850 -29.68747 4"
NOTE: Used archived XRT position of 152.34850 -29.68747  4.00
NOTE: position reference is GCN_Circulars-23455

=========== Draft Upper Limit Circular ========

GRB 181126A: Swift/UVOT Upper Limits

A. A. Breeveld (UCL-MSSL) and E. Sonbas (Adiyaman Univ.)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 181126A
80 s after the BAT trigger (Sonbas et al., GCN Circ. 23453).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 23455)
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            80          230          147         >20.4
u_FC               292          542          246         >19.8
white               80         1181          342         >20.4
v                  622         4881          255         >19.4
b                  548         5511           68         >19.5
u                  292         5496          481         >20.6
w1                 671         5291          255         >20.2
m2                 646         5086          255         >19.6
w2                 597         4677          255         >19.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.07 in the direction of the burst
(Schlegel et al. 1998).