标题： 47 Tuc 在 Rubin 数据预览 1 中：探索早期 LSST 数据和科学潜力 显示英文标题

标题： 47 Tuc in Rubin Data Preview 1: Exploring Early LSST Data and Science Potential

摘要： 我们对鲁宾天文台数据预览1（DP1）的球状星团47 Tuc区域的早期数据进行了分析。 DP1数据集包含鲁宾校准相机（LSSTComCam）四晚的观测数据，覆盖多个波段（ugriy）。 我们解决了DP1中靠近星团核心和SMC方向的拥挤问题，并通过在颜色-颜色图中对恒星轨迹拟合五次多项式并应用多维sigma剪切来实现改进的星系分离。 我们编制了一个包含3,576颗可能的47 Tuc成员星的目录，这些星是通过等时线、盖亚自行和颜色-颜色空间匹配滤波组合选择的。 我们探讨了47 Tuc颜色-颜色序列中的测光散射来源，评估了各种潜在来源的贡献，包括星团内的差异消光。 最后，我们恢复了五颗已知的变星，包括三颗RR Lyrae变星和两颗食双星。 尽管DP1的光变曲线时间采样稀疏，但它们似乎很好地遵循了密集采样的文献光变曲线模式。 尽管在拥挤场恒星分析方面存在一些数据限制，DP1展示了未来LSST数据发布令人期待的科学潜力。 显示英文摘要

摘要： We present analyses of the early data from Rubin Observatory's Data Preview 1 (DP1) for the globular cluster 47 Tuc field. The DP1 dataset for 47 Tuc includes four nights of observations from the Rubin Commissioning Camera (LSSTComCam), covering multiple bands (ugriy). We address challenges of crowding near the cluster core and toward the SMC in DP1, and demonstrate improved star-galaxy separation by fitting fifth-degree polynomials to the stellar loci in color-color diagrams and applying multi-dimensional sigma clipping. We compile a catalog of 3,576 probable 47 Tuc member stars selected via a combination of isochrone, Gaia proper-motion, and color-color space matched filtering. We explore the sources of photometric scatter in the 47 Tuc color-color sequence, evaluating contributions from various potential sources, including differential extinction within the cluster. Finally, we recover five known variable stars, including three RR Lyrae and two eclipsing binaries. Although the DP1 lightcurves have sparse temporal sampling, they appear to follow the patterns of densely-sampled literature lightcurves well. Despite some data limitations for crowded-field stellar analysis, DP1 demonstrates the promising scientific potential for future LSST data releases.