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arXiv 1005.1641astro-ph.CO
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VLA-COSMOS调查。IV。深度数据和联合目录

The VLA-COSMOS Survey. IV. Deep Data and Joint Catalog

Eva Schinnerer, M. T. Sargent, M. Bondi, V. Smolcic, A. Datta, C. L. Carilli, F. Bertoldi, A. Blain, P. Ciliegi, A. M. Koekemoer, N. Z. Scoville

摘要:

在VLA-COSMOS Deep项目的背景下,获得了COSMOS场中心度的1.4 GHz附加VLA A阵列观测结果,并与VLA-COSMOS Large项目的现有数据相结合。使用具有2.5”分辨率的新构建的Deep mosaic来搜索低至4 σ的源,其中在中心50“x50”中具有1 σ ~ 12微焦/束。这个新的星表与Large项目的星表(以1.5“x1.4”分辨率获得)相结合,以构建一个新的联合星表。新的联合目录中列出的所有源在1.5”和/或2.5”分辨率下的峰值通量密度都大于5 sigma,以说明在这些低通量水平下的源的很大一部分预计在1.5”分辨率下被轻微分辨的事实。联合目录中列出的所有属性(例如峰值通量密度、积分通量密度和源尺寸)都在2.5英寸分辨率的深度图像中确定。此外,联合目录包含43个新发现的多组分来源。

英文摘要:

In the context of the VLA-COSMOS Deep project additional VLA A array observations at 1.4 GHz were obtained for the central degree of the COSMOS field and combined with the existing data from the VLA-COSMOS Large project. A newly constructed Deep mosaic with a resolution of 2.5" was used to search for sources down to 4 sigma with 1 sigma ~ 12 microJy/beam in the central 50'x50'. This new catalog is combined with the catalog from the Large project (obtained at 1.5"x1.4" resolution) to construct a new Joint catalog. All sources listed in the new Joint catalog have peak flux densities of >5 sigma at 1.5" and/or 2.5" resolution to account for the fact that a significant fraction of sources at these low flux levels are expected to be slighty resolved at 1.5" resolution. All properties listed in the Joint catalog such as peak flux density, integrated flux density and source size are determined in the 2.5" resolution Deep image. In addition, the Joint catalog contains 43 newly identified multi-component sources.

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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