... northern O and early B stars whose spectra could be obtained with the parameters required to look for variability at the using the CEGS echelle spectrograph, maintained at the coude focus of the 1-m Northern Caucasus Special Astrophysical Observatory (SAO) telescope (Musaev 1996). The list of the program stars includes 29 obiects. When choosing appropriate dates of observations, the program stars can be observed for almost the entire night. ...

Physics of Magnetic Stars, 2007, pp. 262-270 Line profile variability and the possible magnetic field in the spectra of supergiant Leo A.F. Kholtygin1 , G.A. Chountonov2 , S.N. Fabrika2 , T.E. Burlakova Kang Dong-il3 , G.A. Galazutdinov2,4 , M.V. Yushkin2 1 2 2,3 ... Astronomy and Space Science Institute, Optical Astronomy Division, 61-1, Whaam-Dong, YuseongGu, Daejeon, 305-348, Korea 1 Intro duction Line profiles in sp ectra of OB stars are usually strongly variable (Morel et al ...