Spectrograph Instrumental Profiles - Dependence on Dispersion

Details Spectrograph Instrumental Profiles - Dependence on Dispersion Spectrograph Instrumental Profiles - Dependence on Dispersion

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..390a&link_type=abstract

Publications of the Astronomical Society of the Pacific, Vol. 94, P. 390, 1982

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Scientific paper

Spectrograph instrumental profiles (including stray light far away from the central peak) have been measured in blue and red light for the three cameras in the coudé spectrograph of the 1.52-m telescope at Observatoire de Haute-Provence. The different dispersions 0.7, 1.2, and 2.0 nm mm-1 are obtained using the same ruled diffraction grating. On a linear distance scale in the focal plane the profiles are rather similar down to a 10-3 intensity level, but on a wavelength scale the profiles improve with increasing dispersion, indicating the presence of a stray light component other than that caused by diffraction by grating irregularities. The effects of these instrumental profiles on observed spectra are illustrated by numerical convolutions with the solar spectrum.

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