13.3 Gratings

For each grating mode of STIS listed below, we provide the basic properties of the mode, wavelength ranges covered in each central wavelength setting, sensitivities, throughputs, dispersions and plate scales. Advice on usage is provided where appropriate, and comparisons of the G230L, G230M MAMA modes with their G230LB, G230MB CCD counterparts are shown.

Wavelengths in this handbook and in STIS data products are always measured in vacuum conditions.