OmegaWINGS：OmegaCAM @ VST对WINGS星系团的观测
OmegaWINGS: OmegaCAM@VST observations of WINGS galaxy clusters
摘要：
Wide-field Nearby Galaxy-cluster Survey（WINGS）是一个宽场多波长的X射线选择星系团巡天，观测范围为z =0.04-0.07。原来的34'x34' WINGS视场现在已经扩展到覆盖1平方度的测光和光谱领域。本文介绍了Johnson B和V波段OmegaCAM/VST对46个WINGS星系团的观测结果，以及数据处理、数据质量和Sextractor光度星表。在两个波段中，我们的中位观测值为10弧，在V=23.1 mag.25分钟的曝光时间内，每个波段通常达到50%的完整性水平。通过与2 MASS、SDSS天体测量以及SDSS和以前的WINGS成像进行比较，验证了天体测量和光度测量精度的质量。星/星系分离和天空扣除程序进行了测试与以前的WINGS数据进行比较。Sextractor的光度星表在CDS上公开提供，并将与OmegaCAM缩小图像一起被纳入VO上WINGS数据库的下一个版本。这些数据形成了一个大的正在进行的光谱活动与AAOmega/AAT的基础上，并被用于各种研究。[删节]
英文摘要：
The Wide-field Nearby Galaxy-cluster Survey (WINGS) is a wide-field multi-wavelength survey of X-ray selected clusters at z =0.04-0.07. The original 34'x34' WINGS field-of- view has now been extended to cover a 1 sq.deg field with both photometry and spectroscopy. In this paper we present the Johnson B and V-band OmegaCAM/VST observations of 46 WINGS clusters, together with the data reduction, data quality and Sextractor photometric catalogs. With a median seeing of 1arcs in both bands, our 25-minutes exposures in each band typically reach the 50% completeness level at V=23.1 mag. The quality of the astrometric and photometric accuracy has been verified by comparison with the 2MASS as well as with SDSS astrometry, and SDSS and previous WINGS imaging. Star/galaxy separation and sky-subtraction procedure have been tested comparing with previous WINGS data. The Sextractor photometric catalogues are publicly available at the CDS, and will be included in the next release of the WINGS database on the VO together with the OmegaCAM reduced images. These data form the basis for a large ongoing spectroscopic campaign with AAOmega/AAT and is being employed for a variety of studies. [abridged]
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。
