Discovery of deep eclipses in the cataclysmic variable IPHAS J013031.89+622132.3

摘要

I performed photometric observations of the poorly studied cataclysmic variable IPHAS J013031.89 + 622132.3 and discovered very deep eclipses. I obtained observations over 14 nights for a total time of 50 hours during a time span of 6 months. Thanks to the long observation interval, I determined the orbital period with high precision, P-orb = 0.149 350 14 +/- 0.000 000 20 d. I derived the eclipse ephemeris, which, thanks to the precision of the orbital period, has a formal validity of 300 years. The average eclipse depth was 1.88 +/- 0.07 mag. The prominent parts of the eclipses were smooth and symmetrical. The average eclipse width, including extended asymmetric eclipse wings, was 0.18 +/- 0.01 phases or 40 +/- 2 min. The average orbital light curve did not show a prominent orbital hump. Because no dwarf nova outburst occurred during the 6 months of monitoring, this cataclysmic variable is likely to be a nova-like variable.