An Ice Age JWST inventory of dense molecular cloud ices

This dataset is the first observational data release for the JWST Early Release Science Ice Age program (#1309). More information about this program can be found at our team website (http://jwst-iceage.org/) and the STScI website (https://www.stsci.edu/jwst/science-execution/approved-programs/dd-ers/program-1309). The data is analyzed in the article by McClure et al. (2023), to be published on January 24th, 2023 by Nature Astronomy. The dataset consists of 5 files, each containing a spectrum of one of two background stars analyzed in that publication. The spectra are given as wavelength in microns (column 1), flux in milli-Janskys (column 2), and uncertainty in the flux (column 3). Some basic information about the JWST pipeline version is given in the header of each text file, but users should refer to the Methods section of McClure et al. (2023) for the full description of how the data were processed and extracted, as it extends beyond the basic pipelines. Information about how the data were observed is given in the APT file, accessible through a query in STScI's APT application (search by PID 1309) or here at STScI (https://www.stsci.edu/jwst/science-execution/program-information.html?id=1309). Three of the files correspond to the background star NIR38. These represent spectra of this star taken separately by JWST with the NIRCam WFSS, NIRSpec FS, and MIRI LRS FS instrument modes on JWST. The other two files correspond to the background star J110621 and are spectra taken separately by JWST using the NIRSpec FS and MIRI LRS FS instrument modes. It is necessary to cite the McClure et al. (2023) Nature Astronomy publication when making use of these data, to fully describe the data processing, as well as this Zenodo DOI.

本数据集为詹姆斯·韦布太空望远镜（James Webb Space Telescope, JWST）早期释放科学计划"Ice Age"（编号#1309）的首批观测数据发布成果。有关该计划的更多详情，可访问本团队官网（http://jwst-iceage.org/）以及空间望远镜科学研究所（Space Telescope Science Institute, STScI）官网（https://www.stsci.edu/jwst/science-execution/approved-programs/dd-ers/program-1309）查询。该数据集的分析工作见于McClure等人（2023）发表于《自然·天文学》的论文，该论文将于2023年1月24日正式刊出。本数据集共包含5个文件，分别对应上述论文中分析的2颗背景恒星的光谱数据。每个文件的列信息如下：第1列为以微米（microns）为单位的波长，第2列为流量，单位为毫央斯基（milli-Janskys, mJy），第3列为流量的不确定度。每个文本文件的文件头中包含了JWST数据处理管道的基本版本信息，但完整的数据处理与提取流程细节，请参考McClure等人（2023）论文的方法部分——该部分内容超出了标准数据管道的处理范畴。有关数据的观测细节，可通过空间望远镜科学研究所的天文提案工具（Astronomer's Proposal Tool, APT）以项目编号1309为关键词检索获取，或直接访问空间望远镜科学研究所的项目页面（https://www.stsci.edu/jwst/science-execution/program-information.html?id=1309）下载对应APT文件。其中3个文件对应背景恒星NIR38，分别为JWST通过近红外相机宽场无狭缝光谱模式（NIRCam WFSS）、近红外光谱仪狭缝光谱模式（NIRSpec FS）以及中红外仪器低分辨率狭缝光谱模式（MIRI LRS FS）获取的该恒星光谱数据；剩余2个文件对应背景恒星J110621，分别为JWST通过NIRSpec FS与MIRI LRS FS仪器模式获取的该恒星光谱数据。使用本数据集时，需引用McClure等人（2023）发表于《自然·天文学》的论文以完整说明数据处理流程，同时需注明本数据集对应的Zenodo数字对象标识符（DOI）。