We report the development of a 4-color simultaneous camera for the 1.52 m Telescopio Carlos Sánchez ( TCS ) in the Teide Observatory , Canaries , Spain .
The new instrument , named MuSCAT2 , has a capability of 4-color simultaneous imaging in g ( 400–550 nm ) , r ( 550–700 nm ) , i ( 700–820 nm ) , and z _ { s } ( 820–920 nm ) bands .
MuSCAT2 equips four 1024 \times 1024 pixel CCDs , having a field of view of 7.4 \times 7.4 arcmin ^ { 2 } with a pixel scale of 0.44 arcsec per pixel .
The principal purpose of MuSCAT2 is to perform high-precision multi-color exoplanet transit photometry .
We have demonstrated photometric precisions of 0.057 % , 0.050 % , 0.060 % , and 0.076 % as root-mean-square residuals of 60 s binning in g , r , i and z _ { s } bands , respectively , for a G0 V star WASP-12 ( V = 11.57 \pm 0.16 ) .
MuSCAT2 has started science operations since January 2018 , with over 250 telescope nights per year .
MuSCAT2 is expected to become a reference tool for exoplanet transit observations , and will substantially contribute to the follow-up of the TESS and PLATO space missions .