2025/01/03 by V. V. Breus, И. Л. Андронов, Breus, V. +8
Physics and Astronomy · Earth and Planetary Sciences · #Astrophysical Phenomena and Observations #Pulsars and Gravitational Waves Research #Geophysics and Gravity Measurements
paper · pdf · doi:10.48550/arxiv.2501.01940
We report the results of long-term time series photometry on RX J2133.7+5107 (also known as 1RXS J213344.1+510725) obtained at several observatories. Using data taken during 17 years, we determined the current value of the spin period of 570.811470 seconds with the formal accuracy of 0.000006 seconds and a spin-up of the white dwarf with a characteristic time of 1.483(1)×105 years. This is even faster than that reported previously and, if confirmed, makes this object have one of the fastest spin-up timescales of all known intermediate polars. We derived an improved value of the superhump period of the system to be 0d.280130(1). Superhump maxima timings are moving on the phase curve from season to season, showing non-monotonic changes, without a change in superhump period.