  The short-period eclipsing binary ZTFJ1539+5027 discovered by Burdge et al.
(2019) will be a strong gravitational-wave source for the Laser Interferometer
Space Antenna (LISA). We study how well LISA will constrain the parameters of
this system by analyzing simulated gravitational wave data, and find that LISA
observations will significantly improve measurements of the distance and
inclination of the source, and allow for novel constraints to be placed on the
speed of gravity.
