Notes. Spectral types were taken from Neugent et al. 2018, Foellmi et al. 2003a, Foellmi et al. 2003b; T_eff has been extracted from Hainich et al. 2014 and Hainich et al. 2015, and X-ray emission from Gosset et al. 2005, Guerrero & Chu 2008, Guerrero & Chu 2008 and Schnurr et al. 2008. The columns LV and SV mark whether a star is classified as low (L), moderate (M), or highly (H) variable overall or on short timescales, respectively. Numbers in parentheses next to it are the scatter in mag. The seventh column provides information about the variability detected in OGLE data (see Sect. 4.1 for details). The letter "O" indicates outbursting cases, whereas “Ch” denotes cases of changing variability. If a star exhibits one significant peak in its periodogram, letters "P" (for a small number of peaks) or "F" (for a forest of peaks) are used, with subscripts s or l for short- and long-term signals, respectively (see Table C.2 for ephemeris). Furthermore, P+(sub)H indicates the presence of (sub-)harmonic. The last column indicates whether the star was previously suspected to be a binary according to the following references: [1] Foellmi et al. 2003b, [2] Hainich et al. 2014, [3] Shenar et al. 2019 [4] Morgan et al. 1991, or if its Gaia astrometric parameters suggest a possible binary nature (indicated as "Gaia").