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Photometric analysis of the eclipsing polar MN Hya
(National Astronomical Observatories, 2018-07)
As an eclipsing polar with a 3.39 h orbital period, MN Hya was going through a state change when we observed it during 2009-2016. Ten new mid-eclipse times, along with others obtained from literature, allow us to give a ...
A cyclical period variation detected in the updated orbital period analysis of TV Columbae
(Springer, 2010-05)
Two CCD photometries of the intermediate polar TV Columbae are made for obtaining two updated eclipse timings with high precision. There is an interval time ~17 yr since the last mid-eclipse time observed in 1991. Thus, ...