C2D Full OFF-CLOUD 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 Full OFF-CLOUD Catalog provides the most complete but least reliable list of sources in the C2D OFF-CLOUDS fields (ChamaeleonII (CHA_II), Lupus (LUP), Ophiuchus (OPH), Perseus (PER) and Serpens (SER)). 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，简称C2D）斯皮策遗产计划（Spitzer Legacy Program）使用斯皮策空间望远镜的全部三台仪器——红外阵列相机（IRAC）、多波段成像光度计（MIPS）与红外摄谱仪（IRS）——对覆盖从分子云核到原行星盘演化序列的天体进行观测，样本涵盖了广泛的云团质量、恒星质量与恒星形成环境。该计划除靶向约150个已知致密云核外，还利用IRAC与MIPS在3.6至70微米波段，对五片距离地球最近的大型分子云的全部区域开展巡天，以搜寻亮度暗至0.001倍太阳光度的新原恒星候选体与亚恒星天体。C2D项目还对约190个大概率处于行星系统形成早期阶段（年龄最高约10百万年）的系统进行观测，以此探究作为行星核形成原料的星周尘埃的演化历程。全场外场源目录（Full OFF-CLOUD Catalog）收录了C2D场外场（变色龙座II区（Chamaeleon II，CHA_II）、豺狼座（Lupus，LUP）、蛇夫座（Ophiuchus，OPH）、英仙座（Perseus，PER）与巨蛇座（Serpens，SER））中来源最全面但可靠性相对最低的天体列表。本数据集或服务由加州理工学院下属红外处理与分析中心（IPAC）的红外科学档案馆（IRSA）提供，该机构受美国国家航空航天局（National Aeronautics and Space Administration，NASA）合同委托开展运营。