Characterizing the performance of the NIRC2 vortex coronagraph at W.M. Keck Observatory

W. Jerry Xuan, Dimitri Mawet, Henry Ngo +15

The NIRC2 vortex coronagraph is an instrument on Keck II designed to directly image exoplanets and circumstellar disks at mid-infrared bands $L^{\prime }$ (3.4-4.1 $\mu$m) and $M_s$ (4.…