NICER observation list: Target ID 363401

We propose NICER observations of FO Aqr and TV Col, two intermediate polars (IP). Virtually this entire class has count rates that peak at ~1 keV making them ideal candidates NICER observations. Our goal is to determine the geometry and physical parameters of the accretion flows of these sources from their accretion column impinging on the white dwarf to their Alfven radius and accretion disks, employing a combined spectal-temporal analysis of the data. Emphasis will be placed on the accretion flow properties that determine the spectra at E < 1 keV, whose character has been elusive to date. With knowledge of the flow structure we will model the opacity of this regime with photoionization employing models we have used in our previous work on AGN and X-ray binaries.