The UltracoolSheet: Photometry, Astrometry, Spectroscopy, and Multiplicity for 4000+ Ultracool Dwarfs and Imaged Exoplanets

The UltracoolSheet is a catalog of 4000+ ultracool dwarfs (spectral types M6 and later) and imaged exoplanets, including photometry, absolute astrometry, proper motions, parallaxes, multiplicity, spectroscopic classifications, memberships, and ages. The catalog lives in a Google spreadsheet at http://bit.ly/UltracoolSheet where it will receive future updates. The README tab in the spreadsheet contains a detailed description of the contents of the catalog. UltracoolSheet started as a catalog of all spectroscopically confirmed objects of spectral type L0 or later in the extended solar neighborhood (out to ~100 pc) that were known as of April 15, 2015. It has subsequently been extended to include many late-M dwarfs and also augmented with more recent discoveries spanning all ultracool spectral types. The component spreadsheets of UltracoolSheet are posted here as CSV files, along with summary figures and (.dat) files containing ASCII tables to simplify figure plotting for users. The Summary Plots.pdf file shows the sky map, age distribution, publication dates, and proper motion since publication for all objects in UltracoolSheet, as well as the distribution of projected separations of companions. When using data from the UltracoolSheet, please cite the individual papers from which the data comes. Citations codes are included for all the data in the tables, and the References table translates the citation codes into ADS bibcodes, Papers citekeys, and publication titles. For research that benefits from this compilation, please cite this Zenodo post and include the following acknowledgment: "This work has benefited from The UltracoolSheet at http://bit.ly/UltracoolSheet, maintained by Will Best, Trent Dupuy, Michael Liu, Aniket Sanghi, Rob Siverd, and Zhoujian Zhang, and developed from compilations by Dupuy & Liu (2012), Dupuy & Kraus (2013), Deacon et al. (2014), Liu et al. (2016), Best et al. (2018), Best et al. (2021), Sanghi et al. (2023), and Schneider et al. (2023)." The UltracoolSheet itself can be cited by this Zenodo DOI: 10.5281/zenodo.4169084 Questions, comments, suggestions, or contributions?Please send them to [e-mail] (especially contributions!)《超冷天体表（UltracoolSheet）》是一个包含4000余颗超冷矮星（光谱型M6及更晚型）与成像系外行星的数据集，涵盖测光、绝对天体测量、自行、视差、多重性、光谱分类、成员身份与年龄等信息。 该数据集以谷歌表格形式存储于链接 http://bit.ly/UltracoolSheet，后续更新也将在此发布。表格内的README工作表详细说明了该数据集的全部内容。 《超冷天体表》最初是2015年4月15日已被发现的、位于扩展太阳邻域（延伸至约100秒差距）内所有经光谱证认的L0型及更晚型天体的数据集。后续该数据集进行了扩充，纳入了大量晚M型矮星，并补充了涵盖所有超冷光谱型的近年新发现天体。 《超冷天体表》的拆分工作表以CSV文件形式在此发布，同时提供便于用户绘图的汇总图表与包含ASCII表格的(.dat)文件。其中Summary Plots.pdf文件展示了该数据集内所有天体的天图、年龄分布、发表时间、发表后的自行情况，以及伴星的投影间距分布。 使用《超冷天体表》的数据时，请引用数据来源的原始论文。表格内所有数据均附有引用代码，参考文献工作表可将这些引用代码转换为ADS bibcodes、论文引用键（citekeys）与正式发表的论文标题。 若研究工作得益于该数据集的汇编成果，请引用该Zenodo资源，并使用以下致谢语： "本研究得益于《超冷天体表》（http://bit.ly/UltracoolSheet）的使用，该数据集由Will Best、Trent Dupuy、Michael Liu、Aniket Sanghi、Rob Siverd与周建张维护，其汇编工作基于Dupuy & Liu (2012)、Dupuy & Kraus (2013)、Deacon等人(2014)、Liu等人(2016)、Best等人(2018)、Best等人(2021)、Sanghi等人(2023)及Schneider等人(2023)的相关成果。" 《超冷天体表》本身的引用可使用该Zenodo DOI：10.5281/zenodo.4169084。 如有疑问、意见、建议或投稿贡献，请发送邮件至[e-mail]（尤其欢迎贡献内容！）