KMT-2019-BLG-1715: planetary microlensing event with three lens masses
  and two source stars
  We investigate the gravitational microlensing event KMT-2019-BLG-1715, of
which light curve shows two short-term anomalies from a caustic-crossing
binary-lensing light curve: one with a large deviation and the other with a
small deviation. We identify five pairs of solutions, in which the anomalies
are explained by adding an extra lens or source component in addition to the
base binary-lens model. We resolve the degeneracies by applying a method, in
which the measured flux ratio between the first and second source stars is
compared with the flux ratio deduced from the ratio of the source radii.
Applying this method leaves a single pair of viable solutions, in both of which
the major anomaly is generated by a planetary-mass third body of the lens, and
the minor anomaly is generated by a faint second source. A Bayesian analysis
indicates that the lens comprises three masses: a planet-mass object with $\sim
2.6~M_{\rm J}$ and binary stars of K and M dwarfs lying in the galactic disk.
We point out the possibility that the lens is the blend, and this can be
verified by conducting high-resolution followup imaging for the resolution of
the lens from the source.
