NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 231118d23h35m44s256387usUT
NOTE: Source region spec. is: 4.83129 -48.03939 4"
NOTE: Used archived XRT position of   4.83129 -48.03939  4.00
NOTE: position reference is GCN_Circulars-35106
NOTE: Possible detection in wh at T+105.3
NOTE: Possible detection in vv at T+1051.5
NOTE: Possible detection in w1 at T+1617.9
NOTE: Possible detection in uu at T+317.9
NOTE: Possible detection in bb at T+573.2
WARNING: Did not recognize UBS name.

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

GRB 231118A: Swift/UVOT Upper Limits

MSSL (***INSTITUTION***) and S. L. Laha (GSFC/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 231118A
105 s after the BAT trigger (Laha et al., GCN Circ. 35101).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-35106 ***
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           105          255          147         >17.2
u_FC               318          568          246         >16.6
white              105         1539          389         >17.1
v                 1052         1589           58         >16.2
b                  573         1514           58         >17.0
u                  318         1490          285         >16.6
w1                1618         1638           19         >16.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.013 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 231118A: Swift/UVOT Detection

MSSL (***INSTITUTION***) and S. L. Laha (GSFC/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 231118A
105 s after the BAT trigger (Laha et al., GCN Circ. 35101).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-35106 ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  00:19:19.26 =   4.83024 (deg.)
    Dec (J2000) = -48:02:24.1  = -48.04004 (deg.)
with an estimated uncertainty of 0.42 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              105          255          147         17.28 +/- 0.03
v                 1052         1071           20         16.59 +/- 0.16
b                  573          593           19         17.10 +/- 0.11
u                  318          568          246         16.69 +/- 0.04
w1                1618         1638           19         17.18 +/- 0.24

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.013 in the direction of the burst
(Schlegel et al. 1998).