NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 230323d09h13m57s848485usUT
NOTE: Source region spec. is: 16.55353 -47.70079 3"
NOTE: Used archived uvot source position of  16.55353 -47.70079  3.00
NOTE: position reference is GCN_Circ_33505
NOTE: A UVOT position was reported in GCN_Circ_33505
NOTE: Possible detection in wh at T+119.3
NOTE: Possible detection in bb at T+759.1 sum
NOTE: Possible detection in uu at T+331.6
NOTE: Possible detection in w1 at T+710.1

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

GRB 230322B: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and S. B. Cenko (GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 230322B
119 s after the BAT trigger (Cenko et al., GCN Circ. 33505).
No optical afterglow consistent with the XRT position
(Evans et al. GCN Circ. 33507)
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           119          269          147         >17.5
u_FC               332          581          246         >17.6
white              119         1010          334         >17.8
v                  661         1061           58         >18.2
b                  587          779           39         >18.4
u                  332          754          265         >17.6
w1                 710         1095           24         >16.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.017 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 230322B: Swift/UVOT Detection

***UBS*** (***INSTITUTION***) and S. B. Cenko (GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 230322B
119 s after the BAT trigger (Cenko et al., GCN Circ. 33505).
A source consistent with the XRT position
(Evans et al. GCN Circ. 33507)
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  01:06:12.84 =  16.55350 (deg.)
    Dec (J2000) = -47:42:02.8  = -47.70079 (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              119          269          147         17.65 +/- 0.04
v                  661         1061           58        >18.2
b                  587          779           39         19.12 +/- 0.29
u                  332          581          246         17.77 +/- 0.07
w1                 710         1095           24         17.09 +/- 0.24

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.017 in the direction of the burst
(Schlegel et al. 1998).