标题： 帕洛马数字天空调查（DPOSS） 显示英文标题

标题： The Palomar Digital Sky Survey (DPOSS)

摘要： 我们描述了DPOSS，这是一个新的北天数字巡天，基于POSS-II光学天图。该巡天覆盖赤纬δ = -3度以北的整个天空，在3个波段上进行校准，符合Gunn$gri$系统，达到等效极限星等B_lim ~ 22星等。由于底片的最新数字化、扫描的详细处理以及非常广泛的CCD校准计划，数据质量超过了以前基于摄影的尝试。该巡天的最终产品将是帕洛马-诺里斯天体目录，预计包含超过5000万星系和超过20亿颗恒星，达到巡天分类极限，约比流量检测极限高1星等。已经启动了许多利用这些数据的科学项目，我们简要描述其中一些；它们展示了数据的科学潜力，并作为巡天的科学验证测试。最后，我们讨论了天文学中多太字节数据集出现所带来的若干一般性问题。 显示英文摘要

摘要： We describe DPOSS, a new digital survey of the northern sky, based on the POSS-II photographic sky atlas. The survey covers the entire sky north of delta = -3 deg in 3 bands, calibrated to the Gunn $gri$ system, reaching to equivalent limiting magnitude of B_lim ~ 22 mag. As a result of the state-of-the-art digitisation of the plates, detailed processing of the scans, and a very extensive CCD calibration program, the data quality exceedes that of the previous photographically-based efforts. The end product of the survey will be the Palomar-Norris Sky Catalog, anticipated to contain > 50 million galaxies and > 2 billion stars, down to the survey classification limit, ~ 1 mag above the flux detection limit. Numerous scientific projects utilising these data have been started, and we describe briefly some of them; they illustrate the scientific potential of the data, and serve as the scientific verification tests of the survey. Finally, we discuss some general issues posed by the advent of multi-terabyte data sets in astronomy.