NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200807d04h01m07s861691usUT
NOTE: Source region spec. is: 52.93212 37.07875 4"
NOTE: Used archived XRT position of  52.93212  37.07875  4.00
NOTE: position reference is GCN_Circulars-28214
NOTE: Possible detection in wh at T+86.2

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

GRB 200806A: Swift/UVOT Upper Limits

F. E. Marshall (NASA/GSFC) and Ambrosi (INAF-IASFPA)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200806A
86 s after the BAT trigger (Ambrosi et al., GCN Circ. 28211).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 28214)
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         >19.6
u_FC               300          549          246         >19.6
white               86         1026          334         >20.3
v                  629          821           39         >17.9
b                  555          747           39         >19.3
u                  300          722          265         >19.5
w1                 678          870           39         >18.8
m2                 653          845           39         >19.4
w2                 604         1052           58         >19.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.42 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 200806A: Swift/UVOT Detection

F. E. Marshall (NASA/GSFC) and Ambrosi (INAF-IASFPA)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200806A
86 s after the BAT trigger (Ambrosi et al., GCN Circ. 28211).
A source consistent with the XRT position
(Beardmore et al. GCN Circ. 28214)
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               86          236          147         20.26 +/- 0.28
v                  629          821           39        >17.9
b                  555          747           39        >19.3
u                  300          722          265        >19.5
w1                 678          870           39        >18.8
m2                 653          845           39        >19.4
w2                 604         1052           58        >19.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.42 in the direction of the burst
(Schlegel et al. 1998).