NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190121d21h49m44s703547usUT
NOTE: Source region spec. is: 247.8088 -47.8065 4"
NOTE: Used archived XRT position of 247.80880 -47.80650  4.00
NOTE: position reference is GCN_Notice

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

GRB 190121: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190121
133 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
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           133          283          147         >19.3
u_FC               292          497          201         >18.8
white              133         4096          344         >20.0
v                 5890         6090          197         >18.7
b                 3691         3891          197         >19.7
u                  292          497          201         >18.8
m2                6096         6232          134         >19.3
w2                4102         4254          149         >19.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 12.86 in the direction of the burst
(Schlegel et al. 1998).