2094246

Target RA (J2000): 211.459534 and deg Target Dec (J2000): 16.99242 and deg Gaia GMag: 11.95 Programme ID: CH_PR130056 Programme Manager: OSBORN PI of observing programme: Benz Title of programme: CHATEAUX - CHeops And TEss vAlidate Unconfirmed eXoplanets [PILOT] Abstract: The vast majority of TESS Objects of Interest remain unconfirmed in part due to a lack of follow-up observations. There are so many such targets that even with strict filters to ensure targets are small planets several unconfirmed TESS candidates are transiting at any one time. CHATEAUX proposes to use time-critical P3 Cheops observations of a filtered and ranked set of TOIs which would be able to be scheduled between higher-priority time-critical Cheops observations. We expect these filler observations will produce useful scientific observations of TOI candidates including ephemeris improvements TTV detection improved radius precision and improved false positive probabilities (thanks to both ruling our chromaticity and centroid shifts). CHATEAUX envisions passing this data to the community. This will be a pilot to test the programmatic ability of the program before being fully implemented at a later date (including in the extended mission). [truncated! Please see actual data for full text]

目标赤经（J2000坐标系）：211.459534 度
目标赤纬（J2000坐标系）：16.99242 度
盖亚G星等：11.95
项目编号：CH_PR130056
项目主管：OSBORN
观测项目首席研究员：Benz
项目名称：CHATEAUX（Cheops And TEss Validate Unconfirmed eXoplanets）试点项目
摘要：绝大多数凌星系外行星巡天卫星（Transiting Exoplanet Survey Satellite, TESS）的目标天体（TESS Objects of Interest, TOIs）尚未得到确认，部分原因是缺乏后续观测支持。此类未确认候选天体数量极多，即便通过严格筛选以确保目标为小型行星，仍有大量未确认的TESS候选天体在任意时刻处于凌星状态。CHATEAUX计划针对经过筛选与排序的TESS目标天体集合，开展P3优先级的快速响应Cheops观测，此类观测可在优先级更高的Cheops快速响应观测任务间隙进行。我们预期这些填充观测将为TESS候选天体提供极具科学价值的观测数据，包括星历精度提升、凌星时间变化（Transit Timing Variations, TTV）检测、半径精度优化，以及假阳性概率的精准评估——这得益于通过排查色度与质心偏移来排除假阳性干扰。CHATEAUX计划将本项目产生的数据向全球天文社区开放共享。本项目将作为试点，测试项目的流程执行能力，以便在后续（包括任务延长期）全面推行该计划。
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