NICER observation list: Target ID 465901

Quasi-periodic oscillations (QPOs) are potentially valuable tools for studying accretion disks, general relativity, and the environments around black holes. Despite proliferating theories, however, their physical origin is still unknown. Although common in the X-ray light curves of stellar mass black holes, only a handful have been observed in AGN. The discovery of an optical QPO in a Kepler AGN light curve and promising indications of QPOs in TESS data for two AGN with known powerful X-ray QPOs have begun addressing this discrepancy, with important implications for accretion physics. In this proposal, we request NICER monitoring of an AGN with a high-significance X-ray QPO to occur during upcoming TESS monitoring, to provide complementary insight into QPO phenomenon.