NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 260208d21h19m14s772380usUT
NOTE: Source region spec. is: 204.573 +33.766 3"
NOTE: Used archived BAT position of 204.57300  33.76600
NOTE: position reference is GCN_Notice

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

GRB 260208: Swift/UVOT Upper Limits

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

The Swift/UVOT began settled observations of the field of GRB 260208
35094 s after the LAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the LAT position
*** POSITION REFERENCE is GCN_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

white            35626        47035         1252         >21.7
v                36158        47052          293         >18.8
u                35094        46282         1252         >20.9

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