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Skrutskie, M. F; Cutri, R. M; Stiening, R; Weinberg, M. D; Schneider, S; Carpenter, J. M; Beichman, C; Capps, R; Chester, T; Elias, J; Huchra, J; Liebert, J; Lonsdale, C; Monet, D. G; Price, S; Seitzer, P; Jarrett, T; Kirkpatrick, J. D; Gizis, J. E; Howard, E; Evans, T; Fowler, J; Fullmer, L; Hurt, R; Light, R; Kopan, E. L; Marsh, K. A; McCallon, H. L; Tam, R; Van Dyk, S; Wheelock, S
The Astronomical journal, 02/2006, Letnik: 131, Številka: 2Journal Article
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 mm), H (1.65 mm), and Ks (2.16 mm) 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 s 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 s 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.
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in: SICRIS
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