Orbital and spin periods of the intermediate polar 2PBC J0800.5-4306
Abstract
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 Porb=5.38540+0.00027−0.00028 h and Pspin=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.
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BibTeX
@misc{zhao2026orbital,
title = {{Orbital and spin periods of the intermediate polar 2PBC J0800.5-4306}},
author = {Yabing Zhao and Chunhua Zhu and Sufen Guo and Guoliang Lü and Xizhen Lu and Xinyu Liu},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.27351},
eprint = {2609.27351},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.27351},
}
RIS
TY - UNPB
TI - Orbital and spin periods of the intermediate polar 2PBC J0800.5-4306
AU - Yabing Zhao
AU - Chunhua Zhu
AU - Sufen Guo
AU - Guoliang Lü
AU - Xizhen Lu
AU - Xinyu Liu
PY - 2026
DA - 2026/09/23
PB - arXiv
DO - 10.48550/arxiv.2609.27351
UR - https://arxiv.org/abs/2609.27351
AB - 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_orb=5.38540^+0.00027_−0.00028 h and P_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.
ER -