COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 3617 Konkoly Observatory Budapest 6 June 1991 HU ISSN 0374 - 0676 SPECTROSCOPIC DATA ON SEVERAL VARIABLE, OR POSSIBLY VARIABLE, STARS During the early inspection of the moderate-dispersion objective-prism plates taken for the Michigan Southern Spectral Survey, several objects showing H beta H gamma emission were noted but not published (Bidelman and MacConnell 1973) because of uncertain coordinates. New data have become available and it seems worthwhile to publish the old results: Object alpha (1900) delta mag. Date and Remarks NSV 3632 7h 35.5m -82d 39' 13.2-14.1 pg Dec. 1. 1968. 8 30.3 -9 23 11.7 vis Jan. 23. 1969; not seen on later plate. Stephenson finds red, br. Halpha. Hen 1102 15 41.5 -32 25 13.1 vis May 29, 1968. Br. Halpha also seen, sp. perhaps Se. Henize also classifies it as an uncertain Se. V1008 Oph 16 39.0 -14 30 14.2-16.3 pg June 16, 1969. Stephenson finds type M1. br. Halpha. Three other variables appear to have been erroneously classified as of type S: (1) V1959 Cyg was so called by Nassau et al. (1954). However, Cohen et al. (1989) find it to be an M star, and the late N. Sanduleak has classified it on a 1974 plate as M3. (2) V524 Cas=IRC+70012 was classified S by the writer (1980), but what was thought to be the lambda 7909 LaO band is more likely due to VO, and the star is probably of type M8. And (3) GR Cygni=IRC +40466 was also classified as S, again on the basis of the presence of the lambda 7919 LiO band. However in this case the attribution to LaO is thought to be correct, but the star also has very strong infrared CN bands, and should no doubt be classified as intermediate between carbon and S. Its infrared spectrum is in fact quite similar to that of the well-known CS star VX Aquilae. The writer would be, less than candid if he did not acknowledge that he quickly re-examined the spectrum of GR Cygni after Volk and Cohen (1989) published their infrared spectral scan showing a strong SiO feature! Also it may be noted that spectral types for the three RR Lyrae stars BD UMa, BF UMa, and BN CVn have been given by Slettebak and Stock (1959). They are A7, A0, and F0 respectively. WILLIAM P. BIDELMAN Warner & Swasey Observatory Case Western Reserve University Cleveland, Ohio 44106 References: Bidelman, W. P. 1980, Publ. Warner & Swasey Obs. 2, No. 6. Bidelman, W. P., and MacConnell D. J. 1973 Astr. J., 78 687. [BIBCODE 1973AJ.....78..687B ] Cohen, M., Wainscoat, R. J., Walker, H. J., Volk, K., and Schwartz, D. E. 1989, Astr. J., 97, 1759. [BIBCODE 1989AJ.....97.1759C ] Henize, K G. 1976, Astrophys. J. Suppl, 30 491. [BIBCODE 1976ApJS...30..491H ] Nassau, J. J., Blanco. V. M., and Morgan, W. W. 1954, Astrophys. J., 120, 478. [BIBCODE 1954ApJ...120..478N ] Slettebak, A., and Stock, J. 1959, Astr. Abh. Hamburg 5, No. 5. [BIBCODE 1959flss.book.....S ] Stephenson, C. B. 1986, Astrophys. J., 300, 779. [BIBCODE 1986ApJ...300..779S ] Volk, K, and Cohen, M. 1989, Astr. J., 98, 931. [BIBCODE 1989AJ.....98..931V ]