NOTE: uvot_fluxes_wget.pl vrs. 2018-01-16 fem at 180223d01h09m57s258686usUT
NOTE: Source region spec. is: 256.54179 -36.81206 4"
NOTE: Used archived XRT position of 256.54179 -36.81206  4.00
NOTE: position reference is GCN_Circulars-22435
NOTE: Possible detection in wh at T+872.7 sum
NOTE: Possible detection in vv at T+11339.7

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

GRB 180222A: Swift/UVOT Upper Limits

M. H. Siegel (PSU) and J. K. Cannizzo (NASA/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180222A
82 s after the BAT trigger (Cannizzo et al., GCN Circ. 22433).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 22435)
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         >19.7
u_FC               295          544          246         >19.3
white               82         6933          746         >20.3
v                  624        12247         1160         >18.8
b                  550        18491          936         >19.9
u                  295        24232         2050         >20.4
w1                 673        23727         2223         >21.1
m2                 648        22820         1648         >20.5
w2                 600        11334         1230         >20.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.69 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 180222A: Swift/UVOT Detection

M. H. Siegel (PSU) and J. K. Cannizzo (NASA/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180222A
82 s after the BAT trigger (Cannizzo et al., GCN Circ. 22433).
A source consistent with the XRT position
(Beardmore et al. GCN Circ. 22435)
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         5497          550         20.51 +/- 0.23
v                11340        11640          295         18.70 +/- 0.25
b                  550        18491          936        >19.9
u                  295        24232         2050        >20.4
w1                 673        23727         2223        >21.1
m2                 648        22820         1648        >20.5
w2                 600        11334         1230        >20.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.69 in the direction of the burst
(Schlegel et al. 1998).