NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200922d22h55m12s585333usUT
NOTE: Source region spec. is: 296.95361 -55.20447 3"
NOTE: Used archived uvot source position of 296.95361 -55.20447  3.00
NOTE: position reference is GCN_Circulars-28471
NOTE: A UVOT position was reported in GCN_Circulars-28471
NOTE: Possible detection in uu at T+4360.2
NOTE: Possible detection in wh at T+86.1
NOTE: Possible detection in bb at T+4565.7
NOTE: Possible detection in w1 at T+4155.7
NOTE: Possible detection in vv at T+3745.4
NOTE: Possible detection in w2 at T+3540.6
NOTE: Possible detection in m2 at T+3950.2

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

GRB 200922A: Swift/UVOT Upper Limits

A. Belles (PSU) and M. J. Moss (GWU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200922A
86 s after the BAT trigger (Moss et al., GCN Circ. 28471).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 28473)
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            86          236          147         >14.3
white               86         4970          344         >15.6
v                 3745         3945          197         >17.0
b                 4566         4765          197         >17.8
u                 4360         4560          197         >17.1
w1                4156         4355          197         >17.0
m2                3950         4150          197         >16.9
w2                3541         5089          307         >17.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.05 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 200922A: Swift/UVOT Detection

A. Belles (PSU) and M. J. Moss (GWU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200922A
86 s after the BAT trigger (Moss et al., GCN Circ. 28471).
A source consistent with the XRT position
(Osborne et al. GCN Circ. 28473)
is detected in the initial UVOT exposures.

Preliminary detections 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               86          236          147         14.35 +/- 0.02
v                 3745         3945          197         17.27 +/- 0.08
b                 4566         4765          197         17.94 +/- 0.06
u                 4360         4560          197         17.27 +/- 0.06
w1                4156         4355          197         17.23 +/- 0.09
m2                3950         4150          197         17.19 +/- 0.11
w2                3541         3740          197         17.06 +/- 0.09

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.05 in the direction of the burst
(Schlegel et al. 1998).