NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190701d14h50m44s661458usUT
NOTE: Source region spec. is: 223.70079 41.52662 3"
NOTE: Used archived opt source position of 223.70079  41.52662  3.00
NOTE: position reference is GCN_Circulars-24914

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

GRB 190630B: Swift/UVOT Upper Limits

K. K. Simpson (PSU) and F. E. Marshall (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190630B
65 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the optical position
(Zheng and Filippenko GCN Circ. 24914)
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 initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white               65          131           65         >20.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).