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Using photometry collected with the Zwicky Transient Facility (ZTF), we areconducting an ongoing survey for binary systems with short orbital periods($P_{\rm b}<1\rm \,hr)$ with the goal of identifying new gravitational-wavesources detectable by the upcoming Laser Interferometer Space Antenna (LISA).Here, we present a sample of fifteen binary systems discovered thus far, withorbital periods ranging from $6.91\rm\,min$ to $56.35\rm\,min$. Of the fifteensystems, seven are eclipsing systems which do not show signs of significantmass transfer. Additionally, we have discovered two AM Canum Venaticorum (AMCVn) systems and six systems exhibiting primarily ellipsoidal variations intheir light curves. We present follow-up spectroscopy and high-speed photometryconfirming the nature of these systems, estimates of their LISA signal-to-noiseratios (SNR), and a discussion of their physical characteristics.

A systematic search of Zwicky Transient Facility data for ultracompact binary LISA-detectable gravitational-wave sources