NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 211001d13h16m29s936558usUT
NOTE: Source region spec. is: 71.470 +12.040 3"
NOTE: Used archived BAT position of  71.47000  12.04000
NOTE: position reference is GCN_Position_Notice

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

GRB 211001: Swift/UVOT Upper Limits

M. A. Baer (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 211001
72 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the BAT position
*** POSITION REFERENCE is GCN_Position_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 first
finding chart (FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            72          222          147         >20.4
u_FC               284          534          246         >19.8
white               72         1012          334         >20.9
v                  614         1062           58         >18.3
b                  540          732           39         >19.1
u                  284          707          265         >19.8
w1                 663         1102           50         >18.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.411 in the direction of the burst
(Schlegel et al. 1998).