A morphology-independent test of the mixed polarization content of transient gravitational wave signals

The purely tensorial polarization content of gravitational waves is one of the fundamental predictions of General Relativity. Recent detections of compact binary mergers from ground-based detectors can be used to test this prediction. In this talk I will describe a morphology-independent test of the polarization content of the signals. The test does not rely on knowledge of the intrinsic signal morphology, but depends only on the response of a detector network. I will also discuss results from signals GW190521 and GW170817.