NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190825d16h42m16s403494usUT
NOTE: Source region spec. is: 215.30492 -41.89383 4"
NOTE: Used archived XRT position of 215.30492 -41.89383  4.00
NOTE: position reference is GCN_Circulars-25466
NOTE: Possible detection in uu at T+1651.9 sum
NOTE: Possible detection in wh at T+568.1
NOTE: Possible detection in bb at T+799.1
NOTE: Possible detection in vv at T+1058.0

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

GRB 190824A: Swift/UVOT Upper Limits

K. K. Simpson (PSU) and V. D'Elia (SSDC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190824A
568 s after the BAT trigger (D'Elia et al., GCN Circ. 25463).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 25466)
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           568          718          147         >18.7
white              568         1721          392         >18.4
v                 1058         6747          202         >16.9
b                  799         1697           97         >18.0
u                  774         1672           97         >18.6
w1                 750         1647           97         >18.4
m2                 725         1622           97         >19.8
w2                 849         1742          113         >18.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.12 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 190824A: Swift/UVOT Detection

K. K. Simpson (PSU) and V. D'Elia (SSDC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190824A
568 s after the BAT trigger (D'Elia et al., GCN Circ. 25463).
A source consistent with the XRT position
(Osborne et al. GCN Circ. 25466)
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              568          718          147         18.97 +/- 0.09
v                 1058         1250           39         17.14 +/- 0.18
b                  799         1176           39         18.23 +/- 0.17
u                  774         1672           97         19.40 +/- 0.33
w1                 750         1647           97        >18.4
m2                 725         1622           97        >19.8
w2                 849         1742          113        >18.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.12 in the direction of the burst
(Schlegel et al. 1998).