An Improved, “Newtonian” Version of the Ebert‐Fastie Spectrograph | Zendy

D. J. Barry | Zendy; W. G. Bagnuolo | Zendy; Reed Riddle | Zendy

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An Improved, “Newtonian” Version of the Ebert‐Fastie Spectrograph

Author(s) -

D. J. Barry,

W. G. Bagnuolo,

Reed Riddle

Publication year - 2002

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/338429

Subject(s) - spectrograph , physics , collimator , telescope , optics , coma (optics) , field of view , grating , spectrometer , monochromator , astronomy , spectral line , wavelength

A new variation of the off‐plane Ebert‐Fastie spectrograph is described in which a Newtonian folding arrangement is mounted between the collimator/camera mirror and the grating. This arrangement removes the sagittal and tangential astigmatism and coma of the classical Ebert‐Fastie, allowing the design to be extended from a monochromator to CCD spectroscopy. The Newtonian modification (which includes a spherical collimator/camera) results in a point‐spread function that is nearly isotropic across the field of view, well suited to spectroscopic studies of stellar objects. This spectrograph is the dedicated science instrument of the Georgia State University 1 m Multiple Telescope Telescope.

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