MLS120126:042313+212951—A New Eclipsing Cataclysmic Variable in the Period Gap

Abstract: We have analyzed our photometric and spectroscopic observations of the new eclipsing cataclysmic variable MLS120126:042313+212951. We have found the system’s orbital period P=0.1034329 day ((Formula presented.) h) corresponding to the gap (Formula presented.) h in the distribution of cataclysmic variables. A Doppler tomogram in the (Formula presented.) line demonstrates a bright spot that is formed in the accretion stream–outer accretion disk interaction region. Based on known calibrations of the secondary mass versus period, eclipse duration, and emission line peak separation, we have estimated the orbital inclination and the white-dwarf mass: (Formula presented.) and (Formula presented.). These estimates are consistent with the position of the hot spot on the Doppler tomogram

Results of the First Year of the 3BS Polar Search Program

© 2020, Pleiades Publishing, Inc. Abstract: We present the results of the first year of searching for polar candidates within the 3BS (3-Band Survey) program using medium-band filters. Observational data for 84 selected objects from the catalog of cataclysmic variables of the CRTS DR1 sky survey were obtained while implementing the program. A dwarf nova during its outburst and a polar were detected. The available archival data are analyzed. The dwarf nova is of the U Gem or Z Cam type and contains a massive secondary component with M2 = 0.94 ± 0.04 Mʘ. For the polar found we have estimated the orbital period PO = 0d.054437 and calculated the magnetic field strength of the white dwarf B ≈ 32 MG