C2D High Reliability 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 High Reliability OFF-CLOUD Catalog provides the most reliable list of sources in the C2D OFF-CLOUD fields (ChamaeleonII (CHA_II), Lupus (LUP), Ophiuchus (OPH), Perseus (PER) and Serpens (SER)). It is derived from the Full Catalog but requires good signal-to-noise detection in some bands. 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.盘核转换（Cores to Disks, C2D）斯皮策遗产计划使用斯皮策空间望远镜的三台观测仪器：红外阵列相机（Infrared Array Camera, IRAC）、多波段成像光度计（Multiband Imaging Photometer, MIPS）与红外光谱仪（Infrared Spectrograph, IRS），对覆盖从分子云核到原行星盘演化序列的天体开展观测，样本涵盖宽泛的云团质量、恒星质量范围与各类恒星形成环境。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微米波段开展巡天，覆盖5个距离地球最近的大型分子云的全部区域，以搜寻新的候选原恒星与亚恒星天体，探测极限可达0.001倍太阳光度。C2D计划还对约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）的天体系统进行观测，探究星周尘埃——行星核心的原始构成物质——的演化过程。高可靠性云外源表（High Reliability OFF-CLOUD Catalog）提供了C2D云外巡天场域（变色龙座Ⅱ（Chamaeleon II, CHA_II）、豺狼座（Lupus）、蛇夫座（Ophiuchus）、英仙座（Perseus）与巨蛇座（Serpens））中最可靠的源列表。该表源自全源表，但要求在部分波段具备良好的信噪比探测结果。本数据集或服务由红外科学档案馆（Infrared Science Archive, IRSA）提供，该馆隶属于红外处理与分析中心（Infrared Processing and Analysis Center, IPAC），而IPAC由加州理工学院依据与美国国家航空航天局（National Aeronautics and Space Administration, NASA）签订的合同开展运营。