The Two Micron All Sky Survey (2MASS)
The Two Micron All Sky Survey (2MASS)
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DOI：
10.1086/498708
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发表时间：
2006-02
期刊：
影响因子：
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通讯作者：
M. Skrutskie;R. Cutri;R. Stiening;M. Weinberg;Simona Schneider;J. Carpenter;C. Beichman;R. Capps
中科院分区：
文献类型：
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作者：
M. Skrutskie;R. Cutri;R. Stiening;M. Weinberg;Simona Schneider;J. Carpenter;C. Beichman;R. Capps
1997 年 6 月至 2001 年 2 月期间，两微米全天巡天 (2MASS) 在近红外 J (1.25 μm)、H (1.65 μm) 和 Ks (2.16 μm) 带通中收集了 25.4 TB 的原始成像数据，覆盖了 99.998% 的天球。观测是通过位于亚利桑那州霍普金斯山和智利托洛洛山的两台直径为 1.3 m 的专用望远镜进行的。天空上每个点累积的 7.8 秒积分时间和严格的质量控制使得几乎整个天空的 10 σ 点源探测水平在 J、H 和 Ks 波段分别优于 15.8、15.1 和 14.3 星等。亮源提取的 1 σ 光度不确定度 <0.03 mag，天体测量精度为 100 mas 量级。天空中任意两点之间的校准偏移<0.02 星等。 2MASS 全天数据发布包括覆盖整个天空的 410 万张压缩 FITS 图像、点源目录中的 4.71 亿个源提取以及扩展源目录中识别为扩展的 160 万个物体。
Between 1997 June and 2001 February the Two Micron All Sky Survey (2MASS) collected 25.4 Tbytes of raw imaging data covering 99.998% of the celestial sphere in the near-infrared J (1.25 μm), H (1.65 μm), and Ks (2.16 μm) bandpasses. Observations were conducted from two dedicated 1.3 m diameter telescopes located at Mount Hopkins, Arizona, and Cerro Tololo, Chile. The 7.8 s of integration time accumulated for each point on the sky and strict quality control yielded a 10 σ point-source detection level of better than 15.8, 15.1, and 14.3 mag at the J, H, and Ks bands, respectively, for virtually the entire sky. Bright source extractions have 1 σ photometric uncertainty of <0.03 mag and astrometric accuracy of order 100 mas. Calibration offsets between any two points in the sky are <0.02 mag. The 2MASS All-Sky Data Release includes 4.1 million compressed FITS images covering the entire sky, 471 million source extractions in a Point Source Catalog, and 1.6 million objects identified as extended in an Extended Source Catalog.