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The SuperCOSMOS Sky Survey. Paper II: Image detection, parameterisation, classification and photometry

机译:SuperCOSMOS天空调查。论文二:图像检测,参数化,分类和测光

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摘要

In this, the second in a series of three papers concerning the SuperCOSMOS Sky Survey, we describe the methods for image detection, parameterisation, classification and photometry. We demonstrate the internal and external accuracy of our object parameters. Using examples from the first release of data, the South Galactic Cap survey, we show that our image detection completeness is close to 100% to within 1.5 mag of the nominal plate limits. We show that for the Bj survey data, the image classification is externally > 99% reliable to Bj = 19.5. Internally, the image classification is reliable at a level of > 90% to Bj=21, R=19. The photometric accuracy of our data is typically 0.3 mag with respect to external data for m > 15. Internally, the relative photometric accuracy in restricted position and magnitude ranges can be as accurate as 5% for well exposed stellar images. Colours (B-R or R-I) are externally accurate to 0.07 mag at Bj = 16.5 rising to 0.16 mag at Bj = 20.
机译:在本文中,这是有关SuperCOSMOS天空勘测的三篇论文中的第二篇,我们描述了图像检测,参数化,分类和光度法的方法。我们演示了对象参数的内部和外部精度。通过使用首次发布的数据(South Galactic Cap调查)中的示例,我们表明我们的图像检测完整性接近标称板块极限1.5 mag以内的100%。我们显示,对于Bj调查数据,图像分类在外部> 99%时对Bj = 19.5可靠。在内部,图像分类在Bj = 21,R = 19时> 90%的水平上是可靠的。当m> 15时,我们的数据的光度精度相对于外部数据通常为0.3 mag。在内部,对于曝光良好的恒星图像,在受限位置和幅值范围内的相对光度精度​​可以高达5%。颜色(B-R或R-I)在外部精度为Bj = 16.5时为0.07 mag,在Bj = 20时为0.16 mag。

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