NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 240203d16h34m53s059837usUT
NOTE: Source region spec. is: 256.145 -38.030 3"
NOTE: Used archived BAT position of 256.14500 -38.03000
NOTE: position reference is GCN_Position_Notice

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

GRB 240203: Swift/UVOT Upper Limits

S. J. LaPorte (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 240203
4853 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the BAT position
*** POSITION REFERENCE is GCN_Position_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 initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

v                 4853         5052          197         >18.5
u                 5468         5667          197         >18.9
w1                5263         5462          197         >18.8
w2               10632        10642           10         >17.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 2.535 in the direction of the burst
(Schlegel et al. 1998).