论文标题
Gaia-verse III的完整性：使用隐藏状态来推断DR2光曲线的差距，检测效率和扫描定律
Completeness of the Gaia-verse III: using hidden states to infer gaps, detection efficiencies and the scanning law from the DR2 light curves
论文作者
论文摘要
Gaia目录的完整性在很大程度上取决于该空间望远镜的状态。如果恒星的每种恒星被检测到最少的次数，则仅在每个天体，光度法和光谱数据产品中发表恒星。如果科学操作存在差距，检测效率下降或盖亚（Gaia）偏离了指挥扫描法，那么恒星将错过潜在的检测，因此不太可能将其纳入Gaia目录。我们通过开发新的方法来推断盖亚的方向和角度速度，通过时间，差距和效率下降，从数十亿颗恒星的单个测量值中，我们为整个任务中的状态奠定了基础。我们已经将这些方法应用于Gaia DR2变量星时代光度法（目前是Gaia的唯一公开可用的时间序列），并使结果公开可用。我们伴随着这些新的Python软件包Scanninglaw（https://github.com/gaiaverse/scanninglaw），您可以使用它们来轻松预测Gaia的观察时间和检测概率，以便在天空上进行任意位置。
The completeness of the Gaia catalogues heavily depends on the status of that space telescope through time. Stars are only published with each of the astrometric, photometric and spectroscopic data products if they are detected a minimum number of times. If there is a gap in scientific operations, a drop in the detection efficiency or Gaia deviates from the commanded scanning law, then stars will miss out on potential detections and thus be less likely to make it into the Gaia catalogues. We lay the groundwork to retrospectively ascertain the status of Gaia throughout the mission from the tens of individual measurements of the billions of stars, by developing novel methodologies to infer both the orientation and angular velocity of Gaia through time and gaps and efficiency drops in the detections. We have applied these methodologies to the Gaia DR2 variable star epoch photometry -- which are the only publicly available Gaia time-series at the present time -- and make the results publicly available. We accompany these results with a new Python package scanninglaw (https://github.com/gaiaverse/scanninglaw) that you can use to easily predict Gaia observation times and detection probabilities for arbitrary locations on the sky.
