Abstract
High–dispersion astronomical coudé spectrographs frequently give lower–precision radial velocities than expected. This is explained in part in terms of the variable spectral shifts along the plate produced by a camera mirror with zonal imperfections. For a mirror with a sinusoidal zonal irregularity, the standard deviation in the radial velocity depends inversely on the angular dispersion and size of the grating or prism and directly on the amplitude of the surface fluctuation. For a 300–mm grating with 1200 lines/mm used in first order at λ = 0.5 μm, a standard deviation of 0.06 km/sec is obtained for a single measurement if the surface has a peak–to–valley fluctuation of 1/20 wavelength of green light.
© 1969 Optical Society of America
Full Article |
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Figures (2)
You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Tables (1)
You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Equations (11)
You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription