NICER observation list: Target ID 555101

eROSITA, successfully launched in mid-2019, performs multiple all-sky X-ray surveys. By monitoring roughly half a million AGN, eROSITA identifies rare, accretion ignition/shut-down events as they occur. We request 5 ToOs each totalling 60 ks (2 ks roughly every day for 30 days) to explore how the X-ray coronae in AGN respond to a sudden, major change in accretion rate. The NICER data will also deliver the first medium signal-to-noise benchmark spectrum to which later spectra can be compared. They will reveal the evolution of the photon index, the possible intrinsic absorption, and the flux. This data set, combined with high-cadence optical monitoring, will give valuable insights into how accretion flows evolve during AGN ignitions/shut-downs.