A deep survey of the AKARI north ecliptic pole field - I. WSRT 20 cm radio survey description, observations and data reduction
A deep survey of the AKARI north ecliptic pole field - I. WSRT 20 cm radio survey description, observations and data reduction
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AKARI 北黄道场的深度调查 - I. WSRT 20 cm 射电调查描述、观测和数据缩减
DOI：
10.1051/0004-6361/200913366
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发表时间：
2010
影响因子：
6.5
通讯作者：
S. Oliver
中科院分区：
文献类型：
--
作者：
G. White;C. Pearson;R. Braun;S. Serjeant;H. Matsuhara;T. Takagi;T. Nakagawa;R. Shipman;P. Barthel;N. Hwang;Hyung;M. Lee;M. Im;T. Wada;S. Oyabu;S. Pak;M. Chun;H. Hanami;T. Goto;S. Oliver
目标。Westerbork射电综合望远镜（WSRT）已被用于对与AKARI北黄道极深场重合的1.7度2场进行深射电调查。观测结果、数据处理和源计数分析都在报告中列出，沿着说明了总体科学目标。方法.该测量由10个点组成，具有足够的重叠，以保持中心区域的类似灵敏度，在1.4 GHz时达到低至21 μJy波束-1。结果给出了一个包含462个源的星表，分辨率为17.0 × 15.5.从WSRT数据计算的差分源计数已经与Kollgaard等人1994年的浅层VLA − NEP巡天的数据进行了比较，并且显示出比101 mJy更暗的源明显过量，这与在亚mJy通量水平上存在形成星系的星星群相一致。结论. AKARI北黄道极深场是整个光谱区域进行的主要观测活动的重点。这些数据集的结合，沿着无线电观测的深层性质，将允许对大范围的主题进行独特的研究，包括射电源的光度函数的红移演化，无线电星系的集群环境，被遮蔽的无线电大声活动星系核的性质，以及遥远星系的无线电/远红外相关性。这个目录提供了基本的数据集，为未来的一系列文件处理源识别，形态，并确定的无线电源的相关属性。
Aims. The Westerbork Radio Synthesis Telescope, WSRT, has been used to make a deep radio survey of an ∼1.7 degree 2 field coinciding with the AKARI north ecliptic pole deep field. The observations, data reduction and source count analysis are presented, along with a description of the overall scientific objectives. Methods. The survey consisted of 10 pointings, mosaiced with enough overlap to maintain a similar sensitivity across the central region that reached as low as 21 μJy beam −1 at 1.4 GHz. Results. A catalogue containing 462 sources detected with a resolution of 17.0 �� × 15.5 �� is presented. The differential source counts calculated from the WSRT data have been compared with those from the shallow VLA − NEP survey of Kollgaard et al. 1994, and show a pronounced excess for sources fainter than ∼1 mJy, consistent with the presence of a population of star forming galaxies at sub-mJy flux levels. Conclusions. The AKARI north ecliptic pole deep field is the focus of a major observing campaign conducted across the entire spectral region. The combination of these data sets, along with the deep nature of the radio observations will allow unique studies of a large range of topics including the redshift evolution of the luminosity function of radio sources, the clustering environment of radio galaxies, the nature of obscured radio-loud active galactic nuclei, and the radio/far-infrared correlation for distant galaxies. This catalogue provides the basic data set for a future series of paper dealing with source identifications, morphologies, and the associated properties of the identified radio sources.