基于RATAN-600的天顶场巡天模拟
Simulation of a Zenith-Field Sky Survey on RATAN-600
摘要:
在本文中,我们模拟了一个深多频天顶场天空调查的RATAN-600(RZF调查)。在我们的模拟中,我们使用的1.4 GHz的天空图像中获得的NVSS调查。我们将NVSS图像与RATAN-600的二维功率光束图案进行卷积,并在RZF调查的所有波长下获得模拟的24小时天空凌日扫描。对于7.6 cm波长,我们分析了图像区域大小对模拟结果的影响。我们估计的准确性的确定源通量的模拟扫描和导出的光谱指数的源的分布。我们使用模拟扫描来清理7.6 cm处RZF测量的真实记录。该波长处的残余噪声的标准误差约为1 mJy。
英文摘要:
In this paper we simulate a deep multi-frequency zenith-field sky survey on RATAN-600 (the RZF survey). In our simulations we use the 1.4 GHz sky images obtained in the NVSS survey. We convolved NVSS images with the two-dimensional power beam pattern of RATAN-600 and obtain simulated 24-hour scans of sky transits at all wavelengths of the RZF survey. For the 7.6 cm wavelength we analyze the effect of the image area size on the results of the simulation. We estimate the accuracy of the determination of source fluxes on simulated scans and derive the distributions of the spectral indices of the sources. We use the simulated scans to clean real records of the RZF survey at 7.6 cm. The standard error of the residual noise at this wavelength is about 1 mJy.
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