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arXiv 1804.09375astro-ph.GAastro-ph.IM
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盖亚数据发布2:目录验证

Gaia Data Release 2: Catalogue validation

F. Arenou, X. Luri, C. Babusiaux, C. Fabricius, A. Helmi, T. Muraveva, A. C. Robin, F. Spoto, A. Vallenari, T. Antoja, T. Cantat-Gaudin, C. Jordi, N. Leclerc, C… 展开作者

F. Arenou, X. Luri, C. Babusiaux, C. Fabricius, A. Helmi, T. Muraveva, A. C. Robin, F. Spoto, A. Vallenari, T. Antoja, T. Cantat-Gaudin, C. Jordi, N. Leclerc, C. Reylé, M. Romero-Gómez, I-C. Shih, S. Soria, C. Barache, D. Bossini, A. Bragaglia, M. A. Breddels, M. Fabrizio, S. Lambert, P. M. Marrese, D. Massari, A. Moitinho, N. Robichon, L. Ruiz-Dern, R. Sordo, J. Veljanoski, P. Di Matteo, L. Eyer, G. Jasniewicz, E. Pancino, C. Soubiran, A. Spagna, P. Tanga, C. Turon, C. Zurbach

摘要:

第二次盖亚数据发布(DR2)包含超过10亿个来源的非常精确的天体测量和测光特性,数千万个天体物理参数,数百万个径向速度,50万个恒星来源的可变性信息和数千个太阳系物体的轨道。在《目录》出版之前,这些数据都经过专门的验证过程。本文的目标是描述各种Gaia DR2数据的完整性,准确性和精度方面的验证结果。验证过程包括对《目录》内容进行系统分析,以利用统计分析和与外部数据或模型的比较来发现异常情况,无论是个别错误还是统计特性。虽然天体测量、光度测量和光谱数据的质量和数量都是前所未有的,但这表明,如果不专门注意这里、目录文件和所附文件中所述的限制,就不能使用这些数据。特别强调的是在科学开发的数据的统计使用的告诫。

英文摘要:

The second Gaia data release (DR2), contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million of stellar sources and orbits for thousands of solar system objects. Before the Catalogue publication, these data have undergone dedicated validation processes. The goal of this paper is to describe the validation results in terms of completeness, accuracy and precision of the various Gaia DR2 data. The validation processes include a systematic analysis of the Catalogue content to detect anomalies, either individual errors or statistical properties, using statistical analysis, and comparisons to external data or to models. Although the astrometric, photometric and spectroscopic data are of unprecedented quality and quantity, it is shown that the data cannot be used without a dedicated attention to the limitations described here, in the Catalogue documentation and in accompanying papers. A particular emphasis is put on the caveats for the statistical use of the data in scientific exploitation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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