NICER observation list: Target ID 765101

We propose joint NICER and Swift (X-ray+UV) monitoring of the two X-ray bright and time-variable sources AT2018fyk and eRASSt J045650.3-203750. A joint NICER+Swift campaign over the past 5 years (2018-2023) has captured multiple outbursts from these systems, with the interpretation that they represent repeating partial TDEs, in which accretion is driven by a star that is repeatedly stripped of mass by a black hole. Our main goals are 1) to capture additional outbursts and affirm (or refute) the repeating TDE hypothesis for these systems, and 2) acquire high-quality X-ray and UV data during the upcoming outbursts and plateau phases to compare with theoretical predictions. Our goals require long-term monitoring (~ years), high quality X-ray spectra, high X-ray sensitivity, and UV coverage.