Cygnus-X: A Spitzer Legacy Survey of the Cygnus-X Complex

The Cygnus-X region is one of the brightest regions of the sky at all wavelengths and one of the richest known regions of star formation of the Galaxy. The goals of the Cygnus-X survey are to provide a detailed picture of the processes that govern the evolution of massive star forming complexes, to study star formation in the massive star forming complex environment, and to provide a rich sample of intermediate to high mass protostars spanning the full range of protostellar evolution. The project will also allow us to assess the role of feedback in a massive OB star/molecular cloud complex. The survey imaged a ~24 square degree region centered near 20:30:25, +40:00 (J2000). The IRAC images had a median coverage of 3x12s high dynamic range (HDR) frames, and the MIPS data were taken in fast scanning mode in the 24 and 70 μm 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.天鹅座X区域（Cygnus-X）是全天各波段中最明亮的天区之一，也是银河系已知恒星形成活动最为繁盛的区域之一。天鹅座X巡天的核心科学目标在于：详细刻画调控大质量恒星形成复合体演化的物理过程，研究大质量恒星形成复合体环境下的恒星形成现象，并构建覆盖全演化阶段的中高质量原恒星样本库；同时，本项目还将助力我们评估大质量OB星/分子云复合体中反馈效应的作用。本次巡天覆盖了以J2000坐标系下20:30:25、+40:00为中心的约24平方度天区。其中，红外阵列相机（Infrared Array Camera, IRAC）图像的统计中位覆盖率为3组12秒时长的高动态范围（High Dynamic Range, HDR）帧；多波段成像光度计（Multiband Imaging Photometer, MIPS）数据则以快速扫描模式在24μm与70μm两个波段完成采集。本数据集或服务由加州理工学院依据与美国国家航空航天局的合同运营的红外处理与分析中心（Infrared Processing and Analysis Center, IPAC）下属的红外科学档案馆（Infrared Science Archive, IRSA）提供。