  MagAO is the new adaptive optics system with visible-light and infrared
science cameras, located on the 6.5-m Magellan "Clay" telescope at Las Campanas
Observatory, Chile. The instrument locks on natural guide stars (NGS) from
0$^\mathrm{th}$ to 16$^\mathrm{th}$ $R$-band magnitude, measures turbulence
with a modulating pyramid wavefront sensor binnable from 28x28 to 7x7
subapertures, and uses a 585-actuator adaptive secondary mirror (ASM) to
provide flat wavefronts to the two science cameras. MagAO is a mutated clone of
the similar AO systems at the Large Binocular Telescope (LBT) at Mt. Graham,
Arizona. The high-level AO loop controls up to 378 modes and operates at frame
rates up to 1000 Hz. The instrument has two science cameras: VisAO operating
from 0.5-1 $\mu$m and Clio2 operating from 1-5 $\mu$m. MagAO was installed in
2012 and successfully completed two commissioning runs in 2012-2013. In April
2014 we had our first science run that was open to the general Magellan
community. Observers from Arizona, Carnegie, Australia, Harvard, MIT, Michigan,
and Chile took observations in collaboration with the MagAO instrument team.
Here we describe the MagAO instrument, describe our on-sky performance, and
report our status as of summer 2014.
