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arXiv 2607.02809astro-ph.IM
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用SPHEREx瞬态标记率追踪南大西洋异常区域边界

Tracing the Boundary of the South Atlantic Anomaly Region with SPHEREx Transient Flagging Rates

California Institute of Technology（加州理工学院）；Jet Propulsion Laboratory, California Institute of Technology（喷气推进实验室，加州理工学院）；Arizona State University（亚利桑那州立大学）；Rochester Institute of Technology（罗切斯特理工学院）
Chi H. Nguyen, James Bock, Sean Bryan, Walter R. Cook, Brendan Crill, C. Darren Dowell, Olivier Doré, Beth Fabinsky, Candice Fazar, Howard Hui, Phillip Korngut,… 展开作者

Chi H. Nguyen, James Bock, Sean Bryan, Walter R. Cook, Brendan Crill, C. Darren Dowell, Olivier Doré, Beth Fabinsky, Candice Fazar, Howard Hui, Phillip Korngut, Steve Padin, Michael Zemcov

备注：
12 pages, 5 figures, in Proceedings of SPIE Astronomical Telescopes + Instrumentation 2026
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AI总结：

研究利用SPHEREx卫星对全天的观测，通过其H2RG探测器图像处理中的瞬态事件标记，追踪南大西洋异常区域边界，为未来任务提供参考。

摘要：

美国国家航空航天局的SPHEREx卫星于2025年3月发射，用于在0.75 - 5.0微米间巡天。其H2RG探测器图像处理含积分时瞬态事件实时标记。SPHEREx极地轨道每日多次经过南大西洋异常区，该区域瞬态计数高，本文给出其瞬态标记追踪的边界作参考。

英文摘要：

The NASA SPHEREx satellite was launched in 03/2025 to survey the full sky between 0.75 - 5.0 um. The image processing of SPHEREx H2RG detectors includes real-time flagging of transient events during integration. SPHEREx follows a polar orbit passing over the South Atlantic Anomaly (SAA) zone multiple times daily, where the transient counts reach as high as >80% of pixels, depleting the pixel inventory for further analysis. The science pipeline flags all exposures taken while in the SAA for re-observation, as well as any with >10% transients regardless of the spacecraft location. After six months, ~1.5% of the exposures outside of the pre-defined SAA zone were flagged. While some exposures are adjacent to the edge of the SAA, the majority appear to trace the geomagnetic field near the poles. Given the importance of the SAA to designing and operating space instruments, in this paper we present the SAA boundary traced by SPHEREx transient flags as a reference for future mission.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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