White Paper on MAAT@GTC
  MAAT is proposed as a visitor mirror-slicer optical system that will allow
the OSIRIS spectrograph on the 10.4-m Gran telescopio CANARIAS (GTC) the
capability to perform Integral Field Spectroscopy (IFS) over a seeing-limited
FoV 14.20''x10'' with a slice width of 0.303''. MAAT@GTC will enhance the
resolution power of OSIRIS by 1.6 times as compared to its 0.6'' wide
long-slit. All the eleven OSIRIS grisms and volume-phase holographic gratings
will be available to provide broad spectral coverage with moderate resolution
(R=600 up to 4100) in the 3600 - 10000 {\AA} wavelength range. MAAT unique
observing capabilities will broaden its use to the needs of the GTC community
to unveil the nature of most striking phenomena in the universe well beyond
time-domain astronomy. The GTC equipped with OSIRIS+MAAT will also play a
fundamental role in synergy with other facilities, some of them operating on
the northern ORM at La Palma. This White Paper presents the different aspects
of MAAT@GTC - including scientific and technical specifications, outstanding
science cases, and an outline of the instrument concept.
