Kalomeni B.2019-10-262019-10-26201197811070198291743-92131743-9213https://doi.org/10.1017/S1743921311027049https://hdl.handle.net/11454/19253We present long-term observations of magnetic cataclysmic variables AM Her, AN UMa, AR UMa, DP Leo, and V1309 Ori obtained with the ROTSEIIId telescope. All data have been analysed and preliminary results indicate periods of 170 days, 217 days, and 180 days for AM Her, AN UMa, and AR UMa, respectively. © International Astronomical Union 2012.en10.1017/S1743921311027049info:eu-repo/semantics/openAccesscataclysmic variablesstars: individual (AM Her, AN UMa, AR UMa, DP Leo, V1309 OriConference Object7S2829192Q4