NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 260925d01h21m54s598741usUT
NOTE: Source region spec. is: 133.76292 12.04317 4"
NOTE: Used archived XRT position of 133.76292  12.04317  4.00
NOTE: Possible detection in bb at T+3637.3
NOTE: Possible detection in uu at T+334.1
NOTE: Possible detection in vv at T+4253.8
NOTE: Possible detection in wh at T+157.9
WARNING: t_start for light curve (158) and t_start from the exposure report (14896) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB 260924A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and V. D'Elia (SSDC & INAF-OAR)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 260924A
***???*** s after the BAT trigger (D'Elia et al., GCN Circ. 45713).
No optical afterglow consistent with the XRT position
*** GIVE POSITION REFERENCE ***
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           158          308          147         >14.6
white              158         4080          344         >15.4
v                 4254         4454          197         >15.0
b                 3637         5109          230         >15.7
u                  334         5069          234         >18.5
w1                4664         4864          197         >18.5
m2                4459         4658          197         >19.2
w2                4048         4247          197         >19.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.041 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 260924A: Swift/UVOT Detection

***UBS*** (***INSTITUTION***) and V. D'Elia (SSDC & INAF-OAR)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 260924A
***???*** s after the BAT trigger (D'Elia et al., GCN Circ. 45713).
A source consistent with the XRT position
*** GIVE POSITION REFERENCE ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  08:55:03.13 = 133.76304 (deg.)
    Dec (J2000) = +12:02:35.4  =  12.04318 (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              158          308          147         14.68 +/- 0.02
v                 4254         4454          197         15.11 +/- 0.03
b                 3637         3837          197         15.71 +/- 0.03
u                  334          372           37         17.33 +/- 0.24
w1                4664         4864          197        >18.5
m2                4459         4658          197        >19.2
w2                4048         4247          197        >19.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.041 in the direction of the burst
(Schlegel et al. 1998).