A high-resolution echelle spectrograph suitable for astronomical use at both far ultraviolet and visible wavelengths

Computer Science – Performance

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Astronomical Spectroscopy, Echelle Gratings, High Resolution, Optical Emission Spectroscopy, Spectrographs, Ultraviolet Spectrometers, Far Ultraviolet Radiation, Optical Properties, Prisms, Spectral Resolution, Stellar Spectra

Scientific paper

A high-resolution far-ultraviolet echelle spectrograph using a LiF prsims cross disperser has been designed and constructed at The Johns Hopkins University. The instrument has been adapted for use in the visible by a simple interchanging of gratings and of cross dispersers. and has been used at the Cassegrain focus of the 0.9-m telescope at the Goddard Space Flight Center. The performance of the instrument is described in detail. Preliminary observations of a Boo (K2 IIIp) are compared with published data obtained with conventional coudé spectrographs.

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