NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 260128d09h46m08s678179usUT
NOTE: Source region spec. is: 231.87937 6.76214 4"
NOTE: Used archived XRT position of 231.87937   6.76214  4.00
NOTE: position reference is GCN_Circulars-43535
NOTE: Possible detection in wh at T+214.6

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

GRB 260127A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and N. J. Klingler (GSFC/UMBC/CRESSTII)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 260127A
215 s after the BAT trigger (Klingler et al., GCN Circ. 43529).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-43535 ***
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           215          364          147         >19.6
white              215         1882          449         >19.9
v                  520         5227          176         >19.0
b                  446         1857          156         >19.1
u                  422         1832          156         >18.6
w1                 397         1808          156         >18.8
w2                 496          516           19         >17.9

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.048 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 260127A: Swift/UVOT Detection

***UBS*** (***INSTITUTION***) and N. J. Klingler (GSFC/UMBC/CRESSTII)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 260127A
215 s after the BAT trigger (Klingler et al., GCN Circ. 43529).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-43535 ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  15:27:31.12 = 231.87966 (deg.)
    Dec (J2000) = +06:45:45.5  =   6.76264 (deg.)
with an estimated uncertainty of 0.57 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              215          364          147         20.12 +/- 0.19
v                  520         5227          176        >19.0
b                  446         1857          156        >19.1
u                  422         1832          156        >18.6
w1                 397         1808          156        >18.8
w2                 496          516           19        >17.9

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.048 in the direction of the burst
(Schlegel et al. 1998).