NOTE: uvot_fluxes_wget.pl vrs. 2018-01-16 fem at 180626d17h52m41s407773usUT
NOTE: Source region spec. is: 243.57551 14.75707 3"
NOTE: Used archived uvot source position of 243.57551  14.75707  3.00
NOTE: position reference is GCN_Circ_22850
NOTE: A UVOT position was reported in GCN_Circ_22850
NOTE: Possible detection in wh at T+123.3

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

GRB 180626A: Swift/UVOT Upper Limits

A. A. Breeveld (UCL-MSSL) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180626A
123 s after the BAT trigger (Evans et al., GCN Circ. 22850).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 22852)
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           123          273          147         >20.0
u_FC               336          586          246         >20.0
white              123         6063          727         >20.9
v                  665         6473          452         >20.3
b                  591         5858          246         >20.4
u                  336        10361          720         >20.7
w1                 714         6882          432         >20.7
m2                5043         6677          393         >20.9
w2                4634         6268          393         >21.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 180626A: Swift/UVOT Detection

A. A. Breeveld (UCL-MSSL) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180626A
123 s after the BAT trigger (Evans et al., GCN Circ. 22850).
A source consistent with the XRT position
(Osborne et al. GCN Circ. 22852)
is detected in the initial UVOT exposures.

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              123          273          147         20.43 +/- 0.18
v                  665         6473          452        >20.3
b                  591         5858          246        >20.4
u                  336        10361          720        >20.7
w1                 714         6882          432        >20.7
m2                5043         6677          393        >20.9
w2                4634         6268          393        >21.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).