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Target RA (J2000): 351.770172119141 and deg Target Dec (J2000): -1.28627002239227 and deg Gaia GMag: 9.841 Programme ID: CH_PR159006 Programme Manager: ZULETA PI of observing programme: Benz Title of programme: SoM - TRACE Abstract: The TRACE (Measuring the TRansit light sourCe Effect with CHEOPS) program aims to use the CHEOPS telescope to characterize the transit light source effect (TLSE) for exoplanet targets scheduled for observation with the JWST. This effort addresses a critical challenge in exoplanet atmosphere analysis: contamination from stellar activity such as star spots and faculae which can skew measurements of planetary atmospheres by introducing variability in observed spectra. The program will conduct high-precision photometric observations in the optical band an essential range that JWST does not cover but is critical to identify and mitigate stellar contamination in transmission spectra. Focusing on two primary targets in a first stage --TOI-1416 and GJ9827--the project plans long-baseline in and out-of-transit observations spread across a few stellar rotations to model activity-related flux variations. These findings are expected to help the JWST data interpretation of the planets atmosphere and support the broader scientific community by making data publicly available immediately. By characterizing activity in CHEOPS-observed systems TRACE aims to enhance our understanding of exoplanet atmospheres and prepare for future synergy with upcoming missions such as PANDORA. [truncated! Please see actual data for full text]

目标赤经（J2000坐标系）：351.770172119141 度；目标赤纬（J2000坐标系）：-1.28627002239227 度；盖亚（Gaia）G星等：9.841；项目编号：CH_PR159006；项目主管：ZULETA；观测项目首席研究员（Principal Investigator, PI）：Benz；项目名称：SoM - TRACE；摘要：TRACE（利用CHEOPS测量凌星光源效应，Measuring the TRansit light sourCe Effect with CHEOPS）项目旨在借助CHEOPS望远镜，为计划交由詹姆斯·韦伯太空望远镜（James Webb Space Telescope, JWST）观测的系外行星目标表征凌星光源效应（Transit Light Source Effect, TLSE）。本研究针对系外行星大气分析中的一项关键挑战展开攻关：恒星活动（如黑子与光斑）引发的污染会通过改变观测光谱的变化量，干扰行星大气的测量结果。本项目将在光学波段开展高精度测光观测——该波段为JWST未覆盖的关键区间，对识别并校正透射光谱中的恒星污染至关重要。项目第一阶段将聚焦TOI-1416与GJ9827两个核心目标，计划开展覆盖数个恒星自转周期的凌星与非凌星长期基线观测，以建模活动相关的光通量变化。本项目的研究成果有望助力JWST的行星大气数据解译，并通过第一时间公开相关数据服务于更广范围的科研共同体。通过对CHEOPS观测系统中的恒星活动进行表征，TRACE项目旨在深化我们对系外行星大气的认知，并为未来与PANDORA等即将发射的探测任务开展协同研究奠定基础。[内容已截断，请查阅完整原始数据以获取完整文本]