LOFAR 150-MHz observations of the Boötes field: catalogue and source counts
LOFAR 150-MHz observations of the Boötes field: catalogue and source counts
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Bootes 场的 LOFAR 150 MHz 观测：目录和源计数
DOI：
10.1093/mnras/stw1056
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发表时间：
2016
影响因子：
4.8
通讯作者：
J. Zwart
中科院分区：
文献类型：
--
作者：
W. Williams;W. Williams;W. Williams;R. V. Weeren;H. Röttgering;P. Best;T. J. Dijkema;F. Gasperin;M. Hardcastle;G. Heald;G. Heald;I. Prandoni;J. Sabater;T. Shimwell;C. Tasse;I. V. Bemmel;M. Brüggen;G. Brunetti;J. Conway;T. Ensslin;D. Engels;H. Falcke;H. Falcke;C. Ferrari;M. Haverkorn;M. Haverkorn;N. Jackson;M. Jarvis;A. Kapinska;A. Kapinska;E. Mahony;G. Miley;L. Morabito;R. Morganti;R. Morganti;E. Orr'u;E. Retana;S. S. Sridhar;S. S. Sridhar;M. C. Toribio;G. White;G. White;M. Wise;M. Wise;J. Zwart;J. Zwart
我们提出了第一个宽区域（19度（2）），深（千分之一120-150 μ Jy波束（-1）），高分辨率（5.6 × 7.4角秒）的LOFAR高波段天线图像的Bootes领域在130-169 MHz。该图像比先前在低频下针对该场实现的图像至少深一个数量级，并且角分辨率高3-5倍。观测和数据处理，其中包括完全方向相关的校准，在这里描述。本文给出了一个包含6276个源的射电源目录，探测区域为19 °（2），峰值通量密度阈值为5 σ。作为对货车Weeren等人提出的面校准策略的第一次彻底测试，我们调查了星表的通量和位置精度。我们提出了差分源计数，达到一个数量级更深的通量密度比以前实现在这些低频率，并显示在150 MHz的通量密度低于10毫焦耳与低通量密度恒星形成星系和无线电安静活动星系核的崛起相关的扁平化。
We present the first wide area (19 deg(2)), deep (a parts per thousand 120-150 mu Jy beam(-1)), high-resolution (5.6 x 7.4 arcsec) LOFAR High Band Antenna image of the Bootes field made at 130-169 MHz. This image is at least an order of magnitude deeper and 3-5 times higher in angular resolution than previously achieved for this field at low frequencies. The observations and data reduction, which includes full direction-dependent calibration, are described here. We present a radio source catalogue containing 6 276 sources detected over an area of 19 deg(2), with a peak flux density threshold of 5 sigma. As the first thorough test of the facet calibration strategy, introduced by van Weeren et al., we investigate the flux and positional accuracy of the catalogue. We present differential source counts that reach an order of magnitude deeper in flux density than previously achieved at these low frequencies, and show flattening at 150-MHz flux densities below 10 mJy associated with the rise of the low flux density star-forming galaxies and radio-quiet AGN.
影响因子：
6.5
作者：
van Haarlem, M. P.;Wise, M. W.;van Zwieten, J.
通讯作者：
van Zwieten, J.