2093913

Target RA (J2000): 253.869827 and deg Target Dec (J2000): -8.33633 and deg Gaia GMag: 8.27 Programme ID: CH_PR100018 Programme Manager: PAGANO PI of observing programme: Benz Title of programme: ANCILLARY SCIENCE - Low level variability on short time scales of Mdwarfs Abstract: This is a filler program aimimg to characterize the stellar noise (mainly microflares dips and short lasting oscillations) at short time scales for Mdwarfs of different level of variability and other active late type stars hosting exoplanets. Being interested to micro-variability on time scales from few seconds to a hours even one CHEOPS orbit can get useful data. The measured parameters - mean variance pooled variaance flares/microflares occurence rate dips occurence rate power spectrum - will be related to stellar properties (Teff H-alpha Ca II H and K X-ray and UV fluxes). Selected targets spans subclasess of late type stars with different level of activity. They have been selected among those with already know stellar properties (typicall surveyed for exoplanet detection) and include all dM / late K and TTau with planets. [truncated! Please see actual data for full text]

目标赤经（J2000坐标系）：253.869827 度；目标赤纬（J2000坐标系）：-8.33633 度；盖亚（Gaia）G星等：8.27；项目编号：CH_PR100018；项目主管：帕加诺；观测项目首席研究员：本茨；项目标题：辅助科学——M型矮星短时间尺度的低水平变异性
摘要：本项目为补位观测项目，旨在刻画不同变率等级的M型矮星（M dwarfs），以及其他携带有系外行星的活动晚型恒星在短时间尺度下的恒星噪声（主要包括微耀斑、光度凹陷与短时振荡）。我们关注数秒至数小时时间尺度下的微变异性，即便单圈系外行星特征卫星（CHEOPS）观测轨道也能获取有效科学数据。本次将测量的参数包括平均方差、合并方差、耀斑/微耀斑发生率、光度凹陷发生率与功率谱，这些参数将与恒星物理属性（有效温度Teff、Hα谱线、钙II H与K谱线、X射线与紫外通量）建立关联。所选目标涵盖不同活动等级的晚型恒星子类，它们均来自已被测定恒星属性的天体样本（通常为系外行星探测项目的观测目标），包含所有携带有行星的dM型星、晚型K型星与金牛座T型星（T Tauri）。
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