论文标题
\ textit {spitzer} Microlens视差调查的像素级脱机
Pixel Level Decorrelation in Service of the \textit{Spitzer} Microlens Parallax Survey
论文作者
论文摘要
Microlens视差测量结合了空间基和地面观测值，可用于研究行星人口统计。近年来，Spitzer空间望远镜被用作Microlens视差卫星。同时，\ textit {spitzer} irac已被用来研究短期系外行星及其气氛。由于这些研究需要精致的光度法，因此他们激发了现在广泛用于外部活动氛围社区的众多自我校准技术的发展。具体而言，开发了像素水平去相关（PLD），用于在未拥挤的场中主演模式观测。我们适应并扩展了PLD，以使其适合于作为\ textit {spitzer} Microlens Alallax广告系列获得的观察值。我们将我们的方法应用于两个先前发布的微透明事件，即Ogle-2017-Blg-1140和Ogle-2015-Blg-0448，并将其性能与用于分析\ TextIt {Spitzer}微透镜观察的最先进管道进行了比较。我们发现我们的方法产生的光度法是1.5--6倍，就像先前发表的那样精确。除了对\ textit {spitzer}有用外，类似的方法还可以通过Nancy Grace Roman Space望远镜改善微透镜光度法。
Microlens parallax measurements combining space-based and ground-based observatories can be used to study planetary demographics. In recent years, the Spitzer Space Telescope was used as a microlens parallax satellite. Meanwhile, \textit{Spitzer} IRAC has been employed to study short-period exoplanets and their atmospheres. As these investigations require exquisite photometry, they motivated the development of numerous self-calibration techniques now widely used in the exoplanet atmosphere community. Specifically, Pixel Level Decorrelation (PLD) was developed for starring-mode observations in uncrowded fields. We adapt and extend PLD to make it suitable for observations obtained as part of the \textit{Spitzer} Microlens Parallax Campaign. We apply our method to two previously published microlensing events, OGLE-2017-BLG-1140 and OGLE-2015-BLG-0448, and compare its performance to the state-of-the-art pipeline used to analyses \textit{Spitzer} microlensing observation. We find that our method yields photometry 1.5--6 times as precise as previously published. In addition to being useful for \textit{Spitzer}, a similar approach could improve microlensing photometry with the Nancy Grace Roman Space Telescope.
