NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210822d16h31m00s984242usUT
NOTE: Source region spec. is: 304.43771 5.27861 4"
NOTE: Used archived XRT position of 304.43771   5.27861  4.00
NOTE: position reference is GCN_Circulars-30677
NOTE: Possible detection in wh at T+85.4

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

GRB 210822A: 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 210822A
85 s after the BAT trigger (Page et al., GCN Circ. 30677).
No optical afterglow consistent with the XRT position
(Page et al. GCN Circ. 30677)
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            85          235          147         >18.9
u_FC               297          547          246         >20.0
white               85         5058          445         >19.8
v                  626         1249           78         >19.3
b                  553         4960          255         >20.0
u                  297         4754          481         >20.2
w1                 675         1298           78         >19.6
m2                 824         1274           39         >19.4
w2                 602         1225           78         >19.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.162 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 210822A: 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 210822A
85 s after the BAT trigger (Page et al., GCN Circ. 30677).
A source consistent with the XRT position
(Page et al. GCN Circ. 30677)
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               85          235          147         19.16 +/- 0.10
v                  626         1249           78        >19.3
b                  553         4960          255        >20.0
u                  297         4754          481        >20.2
w1                 675         1298           78        >19.6
m2                 824         1274           39        >19.4
w2                 602         1225           78        >19.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.162 in the direction of the burst
(Schlegel et al. 1998).