NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190410d06h14m02s589661usUT
NOTE: Source region spec. is: 324.921 -46.607 3"
NOTE: Used archived BAT position of 324.92100 -46.60700
NOTE: position reference is GCN_Position_Notice

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

GRB 190409A: Swift/UVOT Upper Limits

S. J. Laporte (PSU) and A. D'Ai (INAF-IASFPA)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190409A
2950 s after the BAT trigger (D'Ai et al., GCN Circ. 24081).
No optical afterglow consistent with the BAT position
*** POSITION REFERENCE is GCN_Position_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          2950         3100          147         >20.4
white             2950         4264          273         >20.5
v                 3109        10173          858         >19.5
b                 3932         4131          197         >19.5
u                 3724         3924          197         >19.2
w1                3520         3719          197         >19.4
m2                3313         3513          197         >19.5
w2                8588         9488          886         >20.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).