Figure 1: A plot showing photons/sec detected for the V=4.7 magnitude
A1V star Gamma Scuti using the WIRO longslit with a 2.0 arcsec slit
and the 1800 l/mm grating. Exposure times with this grating setting for other
stars can be scaled accordingly. The total system
efficiency near 6000 Angstroms is around xx%.