2355249

Target RA (J2000): 185.339417 and deg Target Dec (J2000): 57.75247 and deg Gaia GMag: 11.96 Programme ID: CH_PR149000 Programme Manager: OSBORN PI of observing programme: Benz Title of programme: SoM - CHeops And TEss vAlidate Unconfirmed eXoplanets 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). [truncated! Please see actual data for full text]

目标赤经（J2000坐标系）：185.339417 度
目标赤纬（J2000坐标系）：57.75247 度
盖亚（Gaia）G星等：11.96
项目编号：CH_PR149000
项目主管：OSBORN
观测项目首席研究员：Benz
项目名称：SoM - CHeops And TEss vAlidate Unconfirmed eXoplanets
摘要：绝大多数凌日系外行星巡天卫星（Transiting Exoplanet Survey Satellite, TESS）的候选天体（TESS Objects of Interest, TOIs）仍未得到证认，部分原因在于缺乏后续观测。此类候选目标数量极其庞大，即便通过严格筛选以确保目标为小型行星，仍有大量未证认的TESS候选体在任意时段处于凌星状态。CHATEAUX提议利用优先级介于高优先级紧急CHEOPS观测之间的时段，对经过筛选与排序的TOIs集合开展紧急P3级CHEOPS观测。我们预期这些填充式观测将获得关于TOI候选体的有效科学数据，包括轨道历元精化、凌星时间变化（TTV）探测、半径测量精度提升以及假阳性概率优化——这得益于对色度效应与质心偏移的排除。
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