NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 250606d04h01m10s002294usUT
NOTE: Source region spec. is: 166.95708 -19.78819 4"
NOTE: Used archived XRT position of 166.95708 -19.78819  4.00
NOTE: position reference is GCN_Circulars-40633

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

GRB 250605A: Swift/UVOT Upper Limits

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

The Swift/UVOT began settled observations of the field of GRB 250605A
107 s after the BAT trigger (Gupta et al., GCN Circ. 40633).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-40633 ***
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           107          251          141         >20.9
white              107          251          141         >20.9

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.039 in the direction of the burst
(Schlegel et al. 1998).