NICER observation list: Target ID 770102

Accretion disk winds in low-mass X-ray binaries (stellar mass black holes and neutron stars) are smaller scale analogues of the winds in AGN, which feedback energy from the accretion flow to the host galaxy. Still, they can be observed at higher signal-to-noise. We propose joint IXPE-NICER observation with the performance verification XRISM observations of GX 13+1 and V395 Car to understand the geometry and velocity structure of the winds. The high spectral resolution of XRISM will measure the wind velocity structures, while IXPE gives independent constraints on the geometry by X-ray polarization. The NICER helps constrain the intrinsic continuum. Together these will enable the physical wind launch mechanism to be distinguished.