NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200206d03h48m20s227978usUT
NOTE: Source region spec. is: 107.78811 -56.48753 3"
NOTE: Used archived uvot source position of 107.78811 -56.48753  3.00
NOTE: position reference is GCN_Circ_26993
NOTE: A UVOT position was reported in GCN_Circ_26993
NOTE: Possible detection in uu at T+582.7
NOTE: Possible detection in wh at T+351.9
NOTE: Possible detection in bb at T+607.5
NOTE: Possible detection in w1 at T+558.2
NOTE: Possible detection in vv at T+509.0
NOTE: Possible detection in m2 at T+707.4 sum

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

GRB 200205B: Swift/UVOT Upper Limits

K. K. Simpson (PSU) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200205B
352 s after the BAT trigger (Evans et al., GCN Circ. 26993).
No optical afterglow consistent with the XRT position
(Evans et al. GCN Circ. 26993)
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           352          502          147         >16.5
white              352         6555          530         >17.6
v                  509         5529          236         >18.1
b                  608         6350          235         >18.8
u                  583         6145          236         >18.1
w1                 558         5940          236         >17.7
m2                 533         5734          235         >18.1
w2                 658         6759          234         >19.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.11 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 200205B: Swift/UVOT Detection

K. K. Simpson (PSU) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200205B
352 s after the BAT trigger (Evans et al., GCN Circ. 26993).
A source consistent with the XRT position
(Evans et al. GCN Circ. 26993)
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  07:11:09.15 = 107.78812 (deg.)
    Dec (J2000) = -56:29:15.3  = -56.48759 (deg.)
with an estimated uncertainty of 0.42 arc sec. (radius, 90% confidence).

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              352          502          147         16.60 +/- 0.03
v                  509          529           20         16.84 +/- 0.18
b                  608          627           19         17.63 +/- 0.14
u                  583          602           19         17.00 +/- 0.15
w1                 558          752           39         17.09 +/- 0.19
m2                 533         5734          235         18.69 +/- 0.22
w2                 658         6759          234        >19.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.11 in the direction of the burst
(Schlegel et al. 1998).