The group of Mira-type and semi-regular variables with similar periodicity (multiperiodicty) is analyzed. They have periods of 230-260 days and 140-150 days and show intervals of periodical (Mira-type) variability with relatively high amplitude and “semi-regular” (SR-type) small-amplitude oscillations. Results of periodogram analysis are represented.
Date added: Thu, 10 Oct 13