NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 261011d10h11m44s667086usUT
NOTE: Source region spec. is: 248.7495 +26.5814 4"
NOTE: Used archived XRT position of 248.74950  26.58140  4.00
NOTE: position reference is GCN_Notice
WARNING: t_start for light curve (4546) and t_start from the exposure report (4390) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB 261010A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and A. Y. Lien (U. Tampa)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 261010A
***???*** s after the BAT trigger (Lien et al., GCN Circ. 45889).
No optical afterglow consistent with the XRT 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

v                 4546         4745          197         >18.5
u                 5161         5361          197         >19.3
w1                4956         5156          197         >18.6
m2                4750         4950          197         >18.4

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).