NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 181214d08h16m19s566377usUT
NOTE: Source region spec. is: 248.27028 78.49690 3"
NOTE: Used archived uvot source position of 248.27028  78.49690  3.00
NOTE: position reference is GCN_Circ_23529
NOTE: A UVOT position was reported in GCN_Circ_23529
NOTE: Possible detection in uu at T+2583.1
NOTE: Possible detection in wh at T+2352.3
NOTE: Possible detection in bb at T+2607.9
NOTE: Possible detection in w1 at T+2558.8
NOTE: Possible detection in vv at T+2509.3

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

GRB 181213A: Swift/UVOT Upper Limits

M. H. Siegel (PSU) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 181213A
2352 s after the BAT trigger (Evans et al., GCN Circ. 23525).
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          2352         2502          147         >17.3
white             2352         2652          167         >17.3
v                 2509         2703           39         >16.7
b                 2608         3393           88         >17.6
u                 2583         3318          216         >17.1
w1                2559         3112          216         >17.3
m2                2707         2907          197         >18.9
w2                2659         2678           19         >18.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 181213A: Swift/UVOT Detection

M. H. Siegel (PSU) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 181213A
2352 s after the BAT trigger (Evans et al., GCN Circ. 23525).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  16:33:04.86 = 248.27025 (deg.)
    Dec (J2000) = +78:29:48.7  =  78.49685 (deg.)
with an estimated uncertainty of 0.43 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             2352         2502          147         17.38 +/- 0.04
v                 2509         2529           20         16.73 +/- 0.20
b                 2608         2628           19         17.56 +/- 0.17
u                 2583         2603           20         16.79 +/- 0.15
w1                2912         3112          197         17.68 +/- 0.11
m2                2707         2907          197        >18.9
w2                2659         2678           19        >18.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).