NICER observation list: Target ID 563901

The ROSAT All-Sky Survey discovered the Magnificent 7 (M7), seven slowly-rotating, highly magnetized X-ray dim isolated neutron stars (XDINS) with thermal X-ray emission. All but one of the M7 have pulsed emission, with quasi-sinuosoidal light curves and pulsed fractions between 1.5-18 percent. Their nearly-pure thermal spectra, along with absorption features detected in most of the M7, provide a mechanism to probe their atmospheric composition and magnetic and emission geometries. The thermal emission also provides a unique probe of the neutron star equation of state. Four new M7-like XDINS candidates were recently identified in the 4XMM Data Release 10 (4XMM-DR10). We propose to search for X-ray pulsations in the brightest two of these sources.