NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 230121d14h46m53s117520usUT
NOTE: Source region spec. is: 70.2493 +44.5309 4"
NOTE: Used archived XRT position of  70.24930  44.53090  4.00
NOTE: position reference is GCN_Notice
NOTE: Possible detection in wh at T+123.5
NOTE: Possible detection in vv at T+84.9
NOTE: Possible detection in bb at T+537.2
NOTE: Possible detection in uu at T+281.5
NOTE: Possible detection in w1 at T+661.2

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

GRB 230121: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 230121
85 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
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           124          273          147         >19.2
u_FC               282          531          246         >16.3
white              124         1186          353         >17.4
v                   85         1237          109         >15.3
b                  537         1161           58         >16.3
u                  282         1137          285         >16.3
w1                 661         1112           58         >15.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.233 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 230121: Swift/UVOT Detection

***UBS*** (***INSTITUTION***) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 230121
85 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
is detected in the initial UVOT exposures.

Preliminary detections 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              562          581           19         17.52 +/- 0.10
v                   85          116           31         14.74 +/- 0.06
b                  537          557           20         16.84 +/- 0.12
u                  282          531          246         16.37 +/- 0.04
w1                 661          681           19         16.14 +/- 0.17

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.233 in the direction of the burst
(Schlegel et al. 1998).