13CO and potential variability in β Pictoris b with GRAVITY+

We present the first science observations of the updated VLTI/GRAVITY+ instrument at a resolution of 4000, as part of the GRAVITY+ GTO program ID 114.27JS (PI: Laura Kreidberg). These observations targeted beta Pic b, with a total of 38 observations throughout one night (~7 hrs). We present here both the reduced contrast spectra and the mean-averaged spectra and covariance matrices for two different telluric corrections. Our analysis consists of both retrievals with petitRADTRANS and self-consistent models with ExoREM to determine the 12CO/13CO ratio in the atmosphere of beta Pic b. Additionally, we analysed the contrast spectra taken over the whole night to determine the planet's variability amplitude and period. This repository is supplementary to the corresponding paper. Here we include the output files of all retrievals and ExoREM models, as well as Python notebooks to view these outputs. Additionally, we have included the files used for the cross-correlation and variability analysis presented in the paper. A README file is included, which describes the function of the files. There is one example notebook for how to view retrieval results named best_fit_retrieval_results.ipynb. This can also be used to view all other retrieval results. Note: file paths in notebooks may require adjustment to match local directory structures本研究首次报道了升级后的甚大望远镜干涉仪（Very Large Telescope Interferometer, VLTI）/GRAVITY+仪器在分辨率4000下的科学观测数据，该观测属于GRAVITY+ 保证时间观测（Guaranteed Time Observer, GTO）项目编号114.27JS（首席研究员：Laura Kreidberg）。本次观测目标为β绘架座b（β Pictoris b），单夜（约7小时）内共完成38次观测。 本研究同时提供约简对比度光谱，以及针对两种不同地气校正方案的平均光谱与协方差矩阵。本研究的分析工作包含两部分：一是利用petitRADTRANS开展大气反演，二是借助ExoREM构建自洽物理模型，以此测算β绘架座b大气中的12CO/13CO丰度比。此外，本研究还对整夜获取的对比度光谱展开分析，以确定该行星的亮度变化幅度与周期。 本数据集仓库为对应学术论文的补充材料，其中包含所有反演计算与ExoREM模型的输出文件，以及用于查看这些输出结果的Python交互笔记本。此外，仓库中还包含论文中提及的互相关分析与亮度变化分析所用的相关文件。本仓库附带README文件，用于说明各文件的功能。 仓库中附带一份用于演示如何查看反演结果的示例交互笔记本，文件名为best_fit_retrieval_results.ipynb，该笔记本也可用于查看其余所有反演结果。注意：笔记本中的文件路径可能需要根据本地目录结构进行调整。