标题： TESS观测的四颗磁性激变变星的精确时间分析 显示英文标题

标题： Precise Timing Analysis of Four Magnetic Cataclysmic Variables with TESS

摘要： 我们分析了凌日系外行星巡天卫星（TESS）的高时间分辨率光学测光数据，以研究四个类似中间极性目标的计时行为，即V1460 Her、1RXS J045707.4+452751、Swift J0958.0-4208和V842 Cen。 对于V1460 Her，我们改进了其轨道周期的测量。 长期观测表明V1460 Her的轨道周期逐渐减小，在TESS观测期间稳定的光变曲线表明其处于宁静状态。 我们首次检测到来自源1RXS J045707.4+452751的拍动周期为1290.6 $\pm$ 0.5秒，这暗示可能存在盘溢流吸积情景。 对于Swift J0958.0-4208和V842 Cen这两个源，我们分别确定了周期为6.11 $\pm$ 0.02小时和3.555 $\pm$ 0.005小时，可以初步推测它们是轨道周期。 这些发现为理解这些有趣的双星系统的吸积过程及其长期演化提供了宝贵的见解。 显示英文摘要

摘要： We analysed high time-resolution optical photometric data from the Transiting Exoplanet Survey Satellite (TESS) to study the timing behaviour of four intermediate polar-like objects, namely, V1460 Her, 1RXS J045707.4+452751, Swift J0958.0-4208, and V842 Cen. In the case of V1460 Her, we refined the measurement of its orbital period. Long-term observations suggest a gradual decrease in the orbital period of V1460 Her, and the stable light curve during the TESS observations indicates its quiescent state. We detected a beat period of 1290.6 $\pm$ 0.5 s for the first time for the source 1RXS J045707.4+452751, suggesting a possible disc-overflow accretion scenario. For the sources Swift J0958.0-4208 and V842 Cen, we determined periods 6.11 $\pm$ 0.02 h and 3.555 $\pm$ 0.005 h, respectively, which can be provisionally suggested to be orbital periods. These findings provide valuable insights into the accretion processes and long-term evolution of these intriguing binary systems.