This file summarizes several instrument-specific settings that are related to the NOT/ALFOSC spectrograph.

Common Items


Currently only grisms 3, 4, 5, 7, 8, 10, 11 17, 18, 19 and 20 have full template solutions.

Grisms 10 and 11 are very low-resolution and only occupy part of the detector. Depending on the window used, it may be useful to set the find_min_max parameter to some suitable range, e.g.,

        find_min_max = [0,680]

Furthermore, grisms 10 and 11 are so low resolution that the rms of the wavelength solution is often quite poor (roughly 0.2 pixels).

Vertical slits

For vertical slits, the spectrograph class not_alfosc_vert should be used.