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arXiv 0901.4632astro-ph.SR
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光学引力透镜实验。小麦哲伦云的OGLE-III测光图

The Optical Gravitational Lensing Experiment. OGLE-III Photometric Maps of the Small Magellanic Cloud

A. Udalski, I. Soszynski, M. K. Szymanski, M. Kubiak, G. Pietrzynski, L. Wyrzykowski, O. Szewczyk, K. Ulaczyk, R. Poleski

摘要:

我们目前OGLE-III光度图的小麦哲伦云。它们包含精确的,校准的VI测光约620万颗恒星从41 OGLE-III领域在SMC定期观察,在2001年至2008年,并覆盖约14平方度的天空。还提供了这些天体的精确天体测量。其中一个区域,SMC 140,以47 Tuccott银河系球状星团为中心,提供了关于该天体的独特数据。我们讨论了数据的质量,并提出了几个观测场的颜色-星等图。天文学界可从OGLE互联网档案馆获得所有测光数据。

英文摘要:

We present OGLE-III Photometric Maps of the Small Magellanic Cloud. They contain precise, calibrated VI photometry of about 6.2 million stars from 41 OGLE-III fields in the SMC observed regularly in the years 2001-2008 and covering about 14 square degrees in the sky. Also precise astrometry of these objects is provided. One of the fields, SMC140, is centered on the 47 Tucanae Galactic globular cluster providing unique data on this object. We discuss quality of the data and present a few color-magnitude diagrams of the observed fields. All photometric data are available to the astronomical community from the OGLE Internet archive.

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