# title = "Gold Cam 47: 831 l/mm"
# type = grating
# gmm = 831 groves/mm
# blaze = 22.01 deg
# reflectance = 0.840
# eff1 = KPNO/Gratings/gc47.1        # First order measured efficiency
# eff2 = KPNO/Gratings/gc47.2        # Second order measured efficiency
