K-correction for different filters determined using our simulated quasar spectra. The Pan-STARRS1 r_PS and i_PS filters are indicated by blue and green, while the red and cyan are the expected K-corrections for the Pan-STARRS1 z_PS and SDSS-i bands. The solid black line is the K-correction assuming a power-law with slope α = −0.5 with no emission line contribution or Ly_α forest blanketing. At z ≳ 3.7, the difference between the r_PS and i_PS bands becomes more significant as the Ly_α line moves in or out of the filters. The same situation occurs at z ≳ 3.7, but for the i_PS and z_PS bands.