Spectrophotometry of three S stars and thirteen carbon N stars

The absolute energy distributions in the visual spectra (lambda lambda 3200 -7600 Angstrom) of 13 N carbon stars and three S stars have been investigat ed. The spectral resolution of the data is 50 Angstrom and the relative ms error is 2-5%. Our data supplement and extend the Almaty and other spectrop hotometric catalogs that are lacking in these types of objects. The results can be compared with model atmospheres and also used in other studies.