A 2 Micron All Sky Survey

9317456 Kleinmann，S.G.两微米全天测量(2MASS)将在J(1.25um)、H(1.65um)和K‘(2.17um)三个近红外波段获得整个天空的统一地图，具有足够的灵敏度来探测K’14毫安的点源。信心十足。这项调查将比现有的唯一一次大规模近红外天空调查(近25年前进行)深入25000多倍，并将能够探测和准确测量近1亿颗恒星和至少30万个星系的位置和红外亮度。由于它在灵敏度和天空覆盖方面的巨大飞跃，这个数据库的科学潜力目前只能想象。明显的应用是研究恒星在银河系中的大尺度分布和星系在局部宇宙中的大尺度分布。更广泛地说，该数据库将丰富对整个电磁频谱进行的天空测量的分析，并将极大地扩展新的红外阵列技术的科学潜力。P项目的实施涉及建造两个1.3米的望远镜，其中一个将建在Mt.霍普金斯和一座不会在塞罗托洛罗美洲天文台建造。这项调查计划于1996财年开始，预计在南半球需要2年，在北半球需要2-3年。这些数据将在科学团队核实后立即公开，在调查行动开始后的1.5年内。最终的数据产品，包括点源目录和原始数据的扩展源数据库，也将向感兴趣的用户提供。***

ABSTRACT 9317456 Kleinmann, S.G. The Two Micron All Sky Survey (2MASS) will obtain a uniform map of the entire sky in three near-infrared bands, J (1.25 um), H (1.65 um) and K' (2.17 um), with sufficient sensitivity to detect point sources having K'14 mag. at 10 confidence. The survey will penetrate more than 25,000 times deeper than the only existing large-scale near- infrared sky survey, which was carried out nearly 25 years ago (Neugebauer and Leighton 1969), and will enable the detection and accurate measurement of positions and infrared brightness for nearly 100 million stars and at least 300,000 galaxies. Because of its great leap in sensitivity and sky coverage, the scientific potential of this database can only be imagined at present. Obvious applications are the study of the large-scale distribution of stars in the Milky Way and the large-scale distribution of galaxies in the Local Universe. More broadly, the database will enrich analysis of sky surveys carried out over the whole electromagnetic spectrum, and will vastly expand the scientific potential of new infrared array technology. The implementation of the p-project involves the construction of two 1.3m telescopes, one to be built at Mt. Hopkins and one t be built at Cerro Tololo Interamerican Observatory. The survey is planned to begin in FY96, and is expected to take 2 years in the Southern Hemisphere and 2-3 years in the Northern Hemisphere. The data will become publicly available immediately following checkout by the science team, within 1.5 years after the start of survey operations. The final data products, including a Point Source Catalog, and Extended Source database of raw data will also be available to the interested user. ***