中间极 2PBC J0800.5-4306 的轨道周期和自转周期
Orbital and spin periods of the intermediate polar 2PBC J0800.5-4306
- Xinjiang University（新疆大学）
- Yunnan Observatories, Chinese Academy of Sciences (CAS)（中国科学院云南天文台）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
通过 TESS 和 XMM-Newton 计时分析，首次测得中间极 2PBC J0800.5-4306 的轨道周期 5.38540 小时和自转周期 0.7015570 小时，确认其磁性亚型。
AI中文摘要：
2PBC J0800.5$-$4306（Swift J0800.7$-$4309；光学对应体 Gaia DR3 5533020382479508736）是一颗硬X射线选择的激变变星，其磁性亚型此前一直不确定。我们分析了 \textit{TESS} 第88和89扇区的测光数据以及存档的 \textit{XMM-Newton} 计时数据。\textit{TESS} 数据显示在轨道频率 $Ω$、其一次谐波 $2Ω$、白矮星自转频率 $ω$ 以及自转-轨道拍频 $ω-Ω$ 处存在信号。我们测得 $P_{\ m orb}=5.38540^{+0.00027}_{-0.00028}$ 小时和 $P_{\ m spin}=0.7015570^{+0.0000059}_{-0.0000062}$ 小时。\textit{XMM-Newton} EPIC-pn、MOS1 和 MOS2 周期图在 2525.6 秒（0.701557 小时）光学自转周期附近显示出宽峰。结合先前发表的激变变星分类和 Swift/BAT 硬X射线探测，这些计时结果将 2PBC J0800.5$-$4306 确定为中间极。我们报告了其轨道周期和白矮星自转周期的首次发表测量值，同时 SPOC 差影诊断和像素级计时测试支持所测得的 \textit{TESS} 调制与 Gaia 对应体相关，尽管该天区拥挤。
英文摘要：
2PBC J0800.5$-$4306 (Swift J0800.7$-$4309; optical counterpart Gaia DR3 5533020382479508736) is a hard-X-ray-selected cataclysmic variable whose magnetic subtype had remained uncertain. We analyse \textit{TESS} photometry from Sectors 88 and 89 and archival \textit{XMM-Newton} timing data. The \textit{TESS} data show signals at the orbital frequency $Ω$, its first harmonic $2Ω$, the white-dwarf spin frequency $ω$, and the spin--orbit beat frequency $ω-Ω$. We measure $P_{\rm orb}=5.38540^{+0.00027}_{-0.00028}$ h and $P_{\rm spin}=0.7015570^{+0.0000059}_{-0.0000062}$ h. The \textit{XMM-Newton} EPIC-pn, MOS1, and MOS2 periodograms show broad peaks near the 2525.6-s (0.701557-h) optical spin period. Together with the previously published cataclysmic variable classification and Swift/BAT hard-X-ray detection, these timing results identify 2PBC J0800.5$-$4306 as an intermediate polar. We report the first published measurements of its orbital and white-dwarf spin periods, while SPOC difference-image diagnostics and pixel-level timing tests support that the measured \textit{TESS} modulations are associated with the Gaia counterpart despite the crowded field.
