CHARA/MIRC-X -- a high-sensitive six telescope interferometric imager
  concept, commissioning, and early science
  MIRC-X is a six telescope beam combiner at the CHARA array that works in J
and H wavelength bands and provides an angular resolution equivalent to a
$B$=331m diameter telescope. The legacy MIRC combiner has delivered outstanding
results in the fields of stellar astrophysics and binaries. However, we
required higher sensitivity to make ambitious scientific measurements of faint
targets such as young stellar objects, binary systems with exoplanets, and
active galactic nuclei. For that purpose, MIRC-X is built and is offered to the
community since mid-2017. MIRC-X has demonstrated up to two magnitudes of
improved faint magnitude sensitivity with the best-case H <= 8. Here we present
a review of the instrument and present early science results, and highlight
some of our ongoing science programs.
