NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200513d03h57m04s592198usUT
NOTE: Source region spec. is: 7.4148 -2.2101 4"
NOTE: Used archived XRT position of   7.41480  -2.21010  4.00
NOTE: position reference is GCN_Notice
NOTE: Possible detection in wh at T+862.5

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

GRB 200512A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and K. K. Simpson (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200512A
78 s after the BAT trigger (Simpson et al., GCN Circ. 27726).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
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            78          228          147         >19.9
u_FC               236          486          246         >19.8
white               78          980          302         >19.5
v                  567          760           39         >17.1
b                  493          858           58         >19.0
u                  236          833          285         >19.7
w1                 617          809           39         >17.9

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 200512A: Swift/UVOT Detection

***UBS*** (***INSTITUTION***) and K. K. Simpson (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200512A
78 s after the BAT trigger (Simpson et al., GCN Circ. 27726).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
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              862          980          116         19.34 +/- 0.25
v                  567          760           39        >17.1
b                  493          858           58        >19.0
u                  236          833          285        >19.7
w1                 617          809           39        >17.9

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).