C2D Perseus Epoch 2 Transient Sources Catalog

The Cores to Disks (C2D) Spitzer Legacy Program used all three Spitzer instruments (IRAC, MIPS, and IRS) to observe sources that span the evolutionary sequence from molecular cores to protoplanetary disks, encompassing a wide range of cloud masses, stellar masses, and star-forming environments. In addition to targeting about 150 known compact cores, it surveyed with IRAC and MIPS (3.6-70 mum) the entire areas of five of the nearest large molecular clouds for new candidate protostars and substellar objects as faint as 0.001 solar luminosities. C2D observed with IRAC and MIPS about 190 systems likely to be in the early stages of planetary system formation (ages up to about 10 Myr), probing the evolution of the circumstellar dust, the raw material for planetary cores. The Perseus Transient Sources Catalogs list the transient sources detected above 1.6 mJy in the MIPS observations of the Perseus molecular cloud region. This dataset or service is made available by the Infrared Science Archive (IRSA) at IPAC, which is operated by the California Institute of Technology under contract with the National Aeronautics and Space Administration.

“星核至星盘（Cores to Disks, C2D）”斯皮策遗产计划使用斯皮策太空望远镜的三台观测仪器——红外阵列相机（IRAC）、多波段成像光度计（MIPS）以及红外摄谱仪（IRS）——对覆盖从分子星核到原行星盘演化序列的各类天体开展观测，样本涵盖了大范围的云团质量、恒星质量与恒星形成环境。除靶向约150个已知致密星核外，项目还利用红外阵列相机（IRAC）与多波段成像光度计（MIPS）（波段覆盖3.6~70微米），对5个距离地球最近的大型分子云的全域开展巡天观测，以搜寻新的原恒星候选体与亚恒星天体，探测灵敏度可达0.001倍太阳光度。C2D项目还通过红外阵列相机（IRAC）与多波段成像光度计（MIPS），对约190个可能处于行星系统形成早期阶段（年龄最高约10百万年）的天体系统进行观测，以此探究作为行星核形成原料的星周尘埃的演化过程。英仙座暂现源星表（Perseus Transient Sources Catalogs）收录了在对英仙座分子云区域的MIPS观测中，被探测到的光度高于1.6毫央斯基（mJy）的暂现源天体。本数据集或相关服务由加州理工学院受美国国家航空航天局（National Aeronautics and Space Administration, NASA）委托运营的红外处理与分析中心（IPAC）下属的红外科学档案馆（Infrared Science Archive, IRSA）对外提供。