NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 220118d01h17m36s181918usUT
NOTE: Source region spec. is: 91.57217 -28.43764 4"
NOTE: Used archived XRT position of  91.57217 -28.43764  4.00
NOTE: position reference is GCN_Circulars-31472
NOTE: Possible detection in wh at T+876.4 sum

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

GRB 220117A: Swift/UVOT Upper Limits

A. A. Breeveld (UCL-MSSL) and A. Melandri (INAF-OAB)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 220117A
162 s after the BAT trigger (Melandri et al., GCN Circ. 31466).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 31472)
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           162          311          147         >20.5
u_FC               320          570          246         >20.0
white              162          998          306         >20.7
v                  650          845           39         >18.4
b                  576          770           39         >19.4
u                  320          744          265         >20.0
w1                 700          720           19         >19.3
m2                 675          869           39         >18.7
w2                 626          821           39         >18.9

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.028 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 220117A: Swift/UVOT Detection

A. A. Breeveld (UCL-MSSL) and A. Melandri (INAF-OAB)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 220117A
162 s after the BAT trigger (Melandri et al., GCN Circ. 31466).
A source consistent with the XRT position
(Beardmore et al. GCN Circ. 31472)
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              162          998          306         21.46 +/- 0.32
v                  650          845           39        >18.4
b                  576          770           39        >19.4
u                  320          744          265        >20.0
w1                 700          720           19        >19.3
m2                 675          869           39        >18.7
w2                 626          821           39        >18.9

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.028 in the direction of the burst
(Schlegel et al. 1998).