NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 241007d02h04m18s275048usUT
NOTE: Source region spec. is: 304.74258 -40.80514 4"
NOTE: Used archived XRT position of 304.74258 -40.80514  4.00
NOTE: position reference is GCN_Circulars-37722

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

GRB 241006A: 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 241006A
350 s after the BAT trigger (Gupta et al., GCN Circ. 37722).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-37722 ***
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           350          499          147         >21.0
white              350          625          167         >21.0
v                  656          676           19         >17.4
b                  580          600           19         >19.0
u                  556          575           19         >17.9
w1                 531          715           28         >18.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.065 in the direction of the burst
(Schlegel et al. 1998).