NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 211228d08h02m40s828302usUT
NOTE: Source region spec. is: 132.14888 -2.73531 4"
NOTE: Used archived XRT position of 132.14888  -2.73531  4.00
NOTE: position reference is GCN_Circulars-31322
NOTE: Possible detection in uu at T+697.3 sum
NOTE: Possible detection in wh at T+81.9

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

GRB 211227A: Swift/UVOT Upper Limits

A. Belles (PSU) and A. P. Beardmore (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 211227A
82 s after the BAT trigger (Beardmore et al., GCN Circ. 31316).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 31322)
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            82          232          147         >19.4
u_FC               294          544          246         >19.2
white               82         1021          334         >19.5
v                  624         4923          241         >18.7
b                  550          742           39         >18.6
u                  294         5431          357         >19.4
w1                 673         5333          235         >19.7
m2                 648         5127          235         >20.4
w2                 772          792           19         >19.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.020 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 211227A: Swift/UVOT Detection

A. Belles (PSU) and A. P. Beardmore (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 211227A
82 s after the BAT trigger (Beardmore et al., GCN Circ. 31316).
A source consistent with the XRT position
(Goad et al. GCN Circ. 31322)
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               82          232          147         19.80 +/- 0.14
v                  624         4923          241        >18.7
b                  550          742           39        >18.6
u                  294         5431          357         20.12 +/- 0.32
w1                 673         5333          235        >19.7
m2                 648         5127          235        >20.4
w2                 772          792           19        >19.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.020 in the direction of the burst
(Schlegel et al. 1998).