Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993rnaoj...2..349y&link_type=abstract
Rep. Natl. Astron. Obs. Jpn., Vol. 2, No. 1, p. 349 - 357
Astronomy and Astrophysics
Astronomy
Pointing Accuracy: Telescope Mounts
Scientific paper
Practical expressions are given for a collimation error when a spectrograph slit is displaced from the instrument rotator centre. Pointing errors at the Nasmyth focus are discussed when the tertiary mirror is displaced and bent. Then, a method is given how to place a guide probe, when the coordinates of a guide star are given. A rotation angle of the image of the primary mirror on the Shack-Hartmann image plane is calculated when the rotator is continuously driven.
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