The following 102 x 102 mm plane reflection gratings are available:

Grating	Blaze wavelength	Blaze angle
600 l/mm	5000 A	8.63 deg
830.8 l/mm	8465 A	20.57 deg
1200 l/mm	5000 A	17.45 deg

There are two 3-inch square grisms available, which mount immediately in front of the camera lenses. They may be used either as the primary dispersing element when used with a flat in the grating mount, or as a cross disperser when used with one of the above gratings.

Grism	Blaze wavelength	Central Wavelength	Blaze angle
200 l/mm	6730 A	7000 A	15.0 deg
300 l/mm	5200 A	6500 A	17.45 deg

A full set of order separating filters is available which mount in the post slit filter holder. A post slit eyepiece is available for knife edge focusing.

A complete manual for the spectrograph is kept in the control room.

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Updated: 2013Nov13, epg