Recently, we introduced PLanetary Atmospheric Tool for Observer Noobs (PLATON), a Python package that calculates model transmission spectra for exoplanets and retrieves atmospheric characteristics based on observed spectra. We now expand its capabilities to include the ability to compute secondary eclipse depths. We have also added the option to calculate models using the correlated-$k$ method for radiative transfer, which improves accuracy without sacrificing speed. Additionally, we update the opacities in PLATON--many of which were generated using old or proprietary line lists--using the most recent and complete public line lists. These opacities are made available at R=1000 and R=10,000 over the 0.3--30 um range, and at R=375,000 in select near IR bands, making it possible to utilize PLATON for ground-based high resolution cross correlation studies. To demonstrate PLATON's new capabilities, we perform a retrieval on published HST and Spitzer transmission and emission spectra of the archetypal hot Jupiter HD 189733b. This is the first joint transit and secondary eclipse retrieval for this planet in the literature, as well as the most comprehensive set of both transit and eclipse data assembled for a retrieval to date. We find that these high signal-to-noise data are well-matched by atmosphere models with a C/O ratio of $0.66_{-0.09}^{+0.05}$ and a metallicity of $12_{-5}^{+8}$ times solar where the terminator is dominated by extended nanometer-sized haze particles at optical wavelengths. These are among the smallest uncertainties reported to date for an exoplanet, demonstrating both the power and the limitations of HST and Spitzer exoplanet observations.

中文翻译：

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PLATON II：HD 189733b Transit 和 Eclipse 数据的新功能和全面检索

最近，我们推出了面向观测者的行星大气工具 (PLATON)，这是一个 Python 包，可计算系外行星的模型传输光谱并根据观测光谱检索大气特征。我们现在扩展其功能以包括计算二次日食深度的能力。我们还添加了使用辐射传输的相关 $k$ 方法计算模型的选项，这在不牺牲速度的情况下提高了准确性。此外，我们更新了 PLATON 中的不透明度——其中许多是使用旧的或专有的行列表生成的——使用最新和完整的公共行列表。这些不透明度在 0.3--30 um 范围内的 R=1000 和 R=10,000 以及选定的近红外波段中的 R=375,000 时可用，使利用 PLATON 进行地面高分辨率互相关研究成为可能。为了展示 PLATON 的新功能，我们对原型热木星 HD 189733b 已发布的 HST 和 Spitzer 透射和发射光谱进行了检索。这是文献中首次对该行星进行联合凌日和二次日食检索，也是迄今为止为检索而收集的最全面的过境和日食数据集。我们发现这些高信噪比数据与 C/O 比为 $0.66_{-0.09}^{+0.05}$ 和金属度为 $12_{-5}^{+ 的大气模型非常匹配8}$ 倍太阳能，其中终止子由光学波长下的扩展纳米级雾霾颗粒主导。这些是迄今为止对系外行星报道的最小的不确定性之一，