NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 241027d22h47m28s066717usUT
NOTE: Source region spec. is: 293.40058 57.98611 4"
NOTE: Used archived XRT position of 293.40058  57.98611  4.00
NOTE: position reference is GCN_Circulars-37904

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

GRB 241026A: Swift/UVOT Upper Limits

S. J. LaPorte (PSU) and A. Melandri (INAF-OAR)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 241026A
118 s after the BAT trigger (Melandri et al., GCN Circ. 37896).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-37904 ***
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           118          268          147         >19.9
u_FC               331          581          246         >19.8
white              118         1708          411         >21.0
v                  662         1759          136         >19.8
b                  586         1849          128         >20.6
u                  331         1832          363         >20.2
w1                 712         1808          117         >20.7
m2                 686         1783          117         >20.7
w2                 636         1734          136         >20.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.073 in the direction of the burst
(Schlegel et al. 1998).