NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200307d03h45m07s405971usUT
NOTE: Source region spec. is: 101.10548 -62.00494 3"
NOTE: Used archived opt source position of 101.10548 -62.00494  3.00
NOTE: position reference is GCN_Circ-27321
NOTE: Possible detection in uu at T+5663.8
NOTE: Possible detection in wh at T+16850.6
NOTE: Possible detection in bb at T+5868.9

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

GRB 200306A: Swift/UVOT Upper Limits

J. D. Gropp (PSU) and K. K. Simpson (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200306A
85 s after the BAT trigger (Simpson et al., GCN Circ. 27320).
No optical afterglow consistent with the optical position
*** POSITION REFERENCE is GCN_Circ-27321 ***
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         >20.9
white               85        17667         1255         >20.9
v                 5049        29147         1778         >20.3
b                 4434        16845         1278         >20.5
u                  297        23406         1141         >20.5
w1                5459        22590         1082         >20.5
m2                5254         5454          197         >19.2
w2                4844        28355         1968         >20.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.10 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 200306A: Swift/UVOT Detection

J. D. Gropp (PSU) and K. K. Simpson (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200306A
85 s after the BAT trigger (Simpson et al., GCN Circ. 27320).
A source consistent with the optical position
*** POSITION REFERENCE is GCN_Circ-27321 ***
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        17454         1049         21.29 +/- 0.17
v                 5049        29147         1778        >20.3
b                 5869         6069          197         20.46 +/- 0.26
u                  297        23406         1141         21.16 +/- 0.26
w1                5459        22590         1082        >20.5
m2                5254         5454          197        >19.2
w2                4844        28355         1968        >20.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.10 in the direction of the burst
(Schlegel et al. 1998).