NICER observation list: Target ID 465801

SWIFT J1749.4 2807 is the 13th discovered of over 20 AMXPs, and is the only AMXP to be found in an eclipsing system. Using the mass function of the system and the eclipse half-angle, it is possible to constrain the inclination of the system within the 74.4-77.3 deg range. This is the tightest constraint on the orbital inclination of any AMXP to date. SWIFT J1749.4 2807 also shows uncommonly strong harmonic content that, together with the inclination, suggests that it might be the best source to set constraints on neutron star properties including compactness and geometry. To explore this, we propose to observe the next outburst of SWIFT J1749.4 2807 with 120 ksec of NICER observations. We will perform combined timing and spectral study of this source using the unique capabilities of NICER