NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190220d14h52m53s554642usUT
NOTE: Source region spec. is: 330.16309 -76.68067 3"
NOTE: Used archived uvot source position of 330.16309 -76.68067  3.00
NOTE: position reference is GCN_Circ_23908
NOTE: A UVOT position was reported in GCN_Circ_23908
NOTE: Possible detection in wh at T+86.6

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

GRB 190220A: Swift/UVOT Upper Limits

S. J. LaPorte (PSU) and K. L. Page (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190220A
87 s after the BAT trigger (Page et al., GCN Circ. 23908).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GRB_Auto_Processing ***
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            87          236          147         >19.1
u_FC               299          548          246         >19.7
white               87          910          219         >19.4
v                  628          821           39         >18.9
b                  554          747           39         >19.4
u                  299          722          265         >19.7
w1                 678          871           39         >18.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.13 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 190220A: Swift/UVOT Detection

S. J. LaPorte (PSU) and K. L. Page (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190220A
87 s after the BAT trigger (Page et al., GCN Circ. 23908).
A source consistent with the XRT position
*** POSITION REFERENCE is GRB_Auto_Processing ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  22:00:39.17 = 330.16322 (deg.)
    Dec (J2000) = -76:40:50.6  = -76.68073 (deg.)
with an estimated uncertainty of 0.50 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               87          236          147         19.44 +/- 0.11
v                  628          821           39        >18.9
b                  554          747           39        >19.4
u                  299          722          265        >19.7
w1                 678          871           39        >18.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.13 in the direction of the burst
(Schlegel et al. 1998).