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New red and violet system line lists for the CN isotopologues 13C14N and12C15N have been generated. These new transition data are combined with thosepreviously derived for 12C14N, and applied to the determination of CNOabundances in the solar photosphere and in four red giant stars: Arcturus, thebright very low-metallicity star HD 122563, and carbon-enhanced metal-poorstars HD 196944 and HD 201626. When lines of both red and violet system linesare detectable in a star, their derived N abundances are in good agreement. Themean N abundances determined in this work generally are also in accord withpublished values.

Line lists for the A2PI-X2Sigma+ (red) and {B2Sigma+-X2Sigma} (violet) Systems of CN, 13C14N, and 12C15N, and Application to Astronomical Spectra