NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 251017d13h47m00s282074usUT
NOTE: Source region spec. is: 335.40098 7.03990 3"
NOTE: Used archived uvot source position of 335.40098   7.03990  3.00
NOTE: position reference is GCN_Circ_42322
NOTE: A UVOT position was reported in GCN_Circ_42322
NOTE: Possible detection in vv at T+834.8 sum
NOTE: Possible detection in wh at T+120.7
WARNING: t_start for light curve (98) and t_start from the exposure report (120) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB 251017A: Swift/UVOT Upper Limits

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

The Swift/UVOT began settled observations of the field of GRB 251017A
***???*** s after the BAT trigger (Gupta et al., GCN Circ. 42322).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-42326 ***
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           121          270          147         >19.8
u_FC               333          582          246         >20.3
white              121         1358          373         >20.4
v                   98         1408          109         >18.5
b                  588         5138           83         >20.1
u                  333         5126          501         >20.8
w1                 712         4921          255         >18.5
w2                 811         1384           58         >20.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.108 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 251017A: Swift/UVOT Detection

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

The Swift/UVOT began settled observations of the field of GRB 251017A
***???*** s after the BAT trigger (Gupta et al., GCN Circ. 42322).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-42326 ***
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              121          270          147         20.29 +/- 0.17
v                   98         1234           90         19.01 +/- 0.32
b                  588         5138           83        >20.1
u                  333         5126          501        >20.8
w1                 712         4921          255        >18.5
w2                 811         1384           58        >20.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.108 in the direction of the burst
(Schlegel et al. 1998).