NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 240113d03h42m57s470971usUT
NOTE: Source region spec. is: 270.64414 24.48923 3"
NOTE: Used archived uvot source position of 270.64414  24.48923  3.00
NOTE: position reference is GCN_Circ_35522
NOTE: A UVOT position was reported in GCN_Circ_35522
NOTE: Possible detection in w1 at T+3929.6
NOTE: Possible detection in bb at T+4339.5
NOTE: Possible detection in uu at T+4134.4
NOTE: Possible detection in wh at T+120.7

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

GRB 240112C: Swift/UVOT Upper Limits

N. P. M. Kuin (UCL-MSSL) and Eyles-Ferris (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 240112C
121 s after the BAT trigger (Eyles-Ferris et al., GCN Circ. 35522).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-35522 ***
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          236          113         >16.9
white              121         4744          310         >17.9
v                 4955         5126          169         >18.6
b                 4340         4539          197         >18.9
u                 4134         4334          197         >18.7
w1                3930         4129          197         >18.5

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 240112C: Swift/UVOT Detection

N. P. M. Kuin (UCL-MSSL) and Eyles-Ferris (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 240112C
121 s after the BAT trigger (Eyles-Ferris et al., GCN Circ. 35522).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-35522 ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  18:02:34.58 = 270.64410 (deg.)
    Dec (J2000) = +24:29:21.3  =  24.48925 (deg.)
with an estimated uncertainty of 0.43 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              121          236          113         16.98 +/- 0.04
v                 4955         5126          169        >18.6
b                 4340         4539          197         19.35 +/- 0.16
u                 4134         4334          197         19.11 +/- 0.18
w1                3930         4129          197         19.13 +/- 0.24

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).