NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 250616d22h37m50s842314usUT
NOTE: Source region spec. is: 290.38567 4.68514 4"
NOTE: Used archived XRT position of 290.38567   4.68514  4.00
NOTE: position reference is GCN_Circulars-40739

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

GRB 250615A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and S. Dichiara (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 250615A
152 s after the BAT trigger (Dichiara et al., GCN Circ. 40736).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-40739 ***
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

u_FC               152          402          246         >19.7
white              432         1721          284         >20.8
v                  483         1772          156         >19.5
b                  408         1697          136         >20.5
u                  152         1672          363         >19.8
w1                 532         1821          136         >19.6
w2                 804         1747           78         >19.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.165 in the direction of the burst
(Schlegel et al. 1998).