Classification of 831 Two-Micron Sky Survey.

Eight hundred thirty-one infrared sources located south of +5 have been selected from the Two-Micron Sky Survey (IRC), and studied in an objective-prism survey. The set consists of all 551 sources which were not identified in the IRC, 97 sources whose identification in the IRC is questionable, and 183 sources identified by their variable-star catalog name, but for which no classification is given in the IRC. The great majority (89%) of the studied are M stars, but 49 carbon stars and seven S stars as well as 17 peculiar stars with emission near 8600 A have also been identified. If available, recent classifications or identifications from other investiga- tors are included.