NICER observation list: Target ID 364501

We propose to observe NGC 4190 ULX-1, one of the last remaining nearby ULXs without broad- band X-ray data and an excellent target for both NICER and NuSTAR due to its persistently high flux (>10^−12 ergs/s/cm2) and isolation from other X-ray sources. Quasi-simultaneous observations for 50 ks with NICER and 80 ks with NuSTAR will allow us to constrain the broadband spectrum of the source and to search for pulsations and other timing features in both the NICER and NuSTAR data, in one of the best available opportunities to grow the small sample of ULXs with sufficient data for in-depth timing analysis.