NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 240621d09h32m51s037304usUT
NOTE: Source region spec. is: 162.39442 17.28292 4"
NOTE: Used archived XRT position of 162.39442  17.28292  4.00
NOTE: position reference is GCN_Circulars-36721
NOTE: Possible detection in uu at T+740635456.8
NOTE: Possible detection in wh at T+740636273.2
WARNING: t_start for light curve (740635457) and t_start from the exposure report (0) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB ??????: 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 ??????
***???*** s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-36721 ***
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 initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white        740636273    740636911          628         >19.5
v            740637090    740637173           81         >18.5
u            740635457    740641426         1071         >18.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.029 in the direction of the burst
(Schlegel et al. 1998).


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

GRB ??????: 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 ??????
***???*** s after the BAT trigger (***Author*** et al., GCN Circ. ????).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-36721 ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  10:49:34.72 = 162.39467 (deg.)
    Dec (J2000) = +17:16:58.6  =  17.28295 (deg.)
with an estimated uncertainty of 0.50 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        740636273    740636911          628         19.69 +/- 0.08
v            740637090    740637173           81        >18.5
u            740635457    740636267          797         19.15 +/- 0.14

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.029 in the direction of the burst
(Schlegel et al. 1998).