NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 221017d04h06m36s360302usUT
NOTE: Source region spec. is: 38.94479 -34.61039 4"
NOTE: Used archived XRT position of  38.94479 -34.61039  4.00
NOTE: position reference is GCN_Circulars-32774
NOTE: Possible detection in wh at T+97.2

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

GRB 221016A: Swift/UVOT Upper Limits

M. H. Siegel (PSU) and K. L. Page (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 221016A
97 s after the BAT trigger (Page et al., GCN Circ. 32774).
No optical afterglow consistent with the XRT position
(Page et al. GCN Circ. 32774)
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            97          247          147         >19.6
white               97          247          147         >19.6
b                 3736         3861          123         >19.8
u                  309          349           39         >18.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.026 in the direction of the burst
(Schlegel et al. 1998).


=========== Draft Detection Circular ========

GRB 221016A: Swift/UVOT Detection

M. H. Siegel (PSU) and K. L. Page (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 221016A
97 s after the BAT trigger (Page et al., GCN Circ. 32774).
A source consistent with the XRT position
(Page et al. GCN Circ. 32774)
is detected in the initial UVOT exposures.

Preliminary detections and 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: 

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

white               97          247          147         20.20 +/- 0.23
b                 3736         3861          123        >19.8
u                  309          349           39        >18.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.026 in the direction of the burst
(Schlegel et al. 1998).