Photographic Infrared Spectra of Symbiotic Stars
Relatively few spectra of symbiotic stars have been recently published in the photographic infrared. We have observed six objects during the period 1962–1977 with a grating spectrograph attached to the newtonian focus of the 120-cm telescope at Observatoire de Haute Provence. The reciprocal dispersion is 230 A.mm−1 and the region 5800 to 8800 A has been covered using hypersensitized IN plates. The minimum equivalent width for an emission line to be seen is about 0.5 A. The spectra are displayed on plates I and II. We now briefly review the main spectral characteristics.
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