The spectra of all investigated systems are as expected for their respective class.
The orbital ephemeris of LS IV md5=97061dd88dcf5e9fd01d32dce59eeca5" title="Click to view the MathML source">−08° 3 have been improved.
Doppler mapping of LS IV md5=97061dd88dcf5e9fd01d32dce59eeca5" title="Click to view the MathML source">−08° 3 reveal distinct emission sites (outer accretion disk and illuminated secondary star).
Tentative orbital periods of 0.21462 days and 0.229 days are derived for HQ Mon and ST Cha, respectively.
Light curves of all systems are discussed.