NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 250129d21h37m56s484564usUT
NOTE: Source region spec. is: 198.67670 5.03064 3"
NOTE: Used archived uvot source position of 198.67670   5.03064  3.00
NOTE: position reference is GCN_Circ_39085
NOTE: A UVOT position was reported in GCN_Circ_39085
NOTE: Possible detection in vv at T+1342.2
NOTE: Possible detection in uu at T+1417.6
NOTE: Possible detection in wh at T+1184.3
NOTE: Possible detection in bb at T+1443.0

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

GRB 250129A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and A. P. Beardmore (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 250129A
1184 s after the BAT trigger (Beardmore et al., GCN Circ. 39066).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-39082 ***
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          1184         1334          147         >17.4
white             1184         1834          206         >17.4
v                 1342         1885           58         >16.6
b                 1443         5188           65         >17.1
u                 1418         1784           39         >16.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.037 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 250129A: Swift/UVOT Detection

***UBS*** (***INSTITUTION***) and A. P. Beardmore (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 250129A
1184 s after the BAT trigger (Beardmore et al., GCN Circ. 39066).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-39082 ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  13:14:42.41 = 198.67670 (deg.)
    Dec (J2000) = +05:01:50.3  =   5.03064 (deg.)
with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence).

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             1184         1334          147         17.45 +/- 0.04
v                 1342         1362           19         16.73 +/- 0.18
b                 1443         1463           20         17.45 +/- 0.15
u                 1418         1437           20         16.93 +/- 0.16

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.037 in the direction of the burst
(Schlegel et al. 1998).