NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200127d23h46m38s721568usUT
NOTE: Source region spec. is: 295.1941 +44.9003 4"
NOTE: Used archived XRT position of 295.19410  44.90030  4.00
NOTE: position reference is GCN_Notice

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

GRB 200127A: Swift/UVOT Upper Limits

A. Belles (PSU) and M. J. Moss (GWU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200127A
150 s after the BAT trigger (Moss et al., GCN Circ. 26895).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
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           150          300          147         >20.4
u_FC               310          560          246         >19.4
white              150        11742         1368         >22.3
v                  640        16568         1317         >20.2
b                  566        10830         1121         >21.3
u                  310         6701          638         >20.2
w1                 690        18173         1095         >21.1
m2                 838        17473         1298         >20.6
w2                 615        12437         1110         >20.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.16 in the direction of the burst
(Schlegel et al. 1998).