NOTE: uvot_fluxes_wget.pl vrs. 2017-12-12 fem at 180115d23h27m26s061615usUT
NOTE: Source region spec. is: 12.03856 -15.63051 3"
NOTE: Used archived uvot source position of  12.03856 -15.63051  3.00
NOTE: position reference is GCN_Circ_22335
NOTE: A UVOT position was reported in GCN_Circ_22335
NOTE: Possible detection in uu at T+298.7
NOTE: Possible detection in wh at T+140.5
NOTE: Possible detection in bb at T+554.5
NOTE: Possible detection in vv at T+628.3

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

GRB 180115A: Swift/UVOT Upper Limits

F. E. Marshall (NASA/GSFC) and J. K. Cannizzo (NASA/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180115A
140 s after the BAT trigger (Cannizzo et al., GCN Circ. 22335).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 22337)
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           140          290          147         >17.5
u_FC               299          548          246         >16.2
white              140         7200          785         >18.0
v                  628        11391         1191         >18.6
b                  554         6995          491         >18.5
u                  299         6790          717         >17.1
w1                1109        13068         1165         >20.7
m2                4743        12296         1279         >21.8
w2                5769         7329          318         >20.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 180115A: Swift/UVOT Detection

F. E. Marshall (NASA/GSFC) and J. K. Cannizzo (NASA/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180115A
140 s after the BAT trigger (Cannizzo et al., GCN Circ. 22335).
A source consistent with the XRT position
(Goad et al. GCN Circ. 22337)
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  00:48:09.27 =  12.03862 (deg.)
    Dec (J2000) = -15:37:49.9  = -15.63054 (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              140          290          147         17.61 +/- 0.04
v                  628          648           20         16.50 +/- 0.16
b                  554          574           20         16.93 +/- 0.11
u                  299          548          246         16.32 +/- 0.04
w1                1109        13068         1165        >20.7
m2                4743        12296         1279        >21.8
w2                5769         7329          318        >20.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).