AzTEC对COSMOS油田的毫米测量：I.数据简化和源目录
AzTEC Millimetre Survey of the COSMOS Field: I. Data Reduction and Source Catalogue
摘要：
我们提出了一个1.1毫米波长的成像调查，覆盖0.3平方米。°的在宇宙领域。这些数据是由詹姆斯·克拉克·麦克斯韦望远镜（James Clerk Maxwell Telescope，JCMT）上的AzTEC连续照相机获得的，集中在一个突出的大尺度结构过密度上，其中包括一个z = 0.73的丰富X射线团。从中央0.15平方米的区域中提取了总共50毫米的星系候选者，其显著性范围为3.5 - 8.5西格玛。°的具有1.3 mJy/束的均匀灵敏度的区域。16个源被检测到S/N> 4.5，其中预期的误检率为零，其中令人惊讶的是大量（9）具有固有的（反推）通量> 5 mJy，1.1 mm。假设发射主要是来自尘埃的辐射，由大量年轻的光学遮蔽恒星加热，那么这些明亮的AzTEC源的远红外光度大于6 × 10^12升（太阳），恒星形成速率大于1100米（太阳）/年。这九个明亮的AzTEC源中有两个被发现朝向X射线团的边缘区域，而其余的则分布在更大规模的过密度区域。我们描述了AzTEC数据简化管道，源提取算法，和源目录的特性，包括完整性，通量去提升校正，误检率和源位置的不确定性，通过一组广泛的蒙特卡罗模拟。我们得出结论，初步比较，通过叠加分析，重叠MIPS 24微米数据和无线电数据与此AzTEC地图的COSMOS领域。
英文摘要：
We present a 1.1 mm wavelength imaging survey covering 0.3 sq. deg. in the COSMOS field. These data, obtained with the AzTEC continuum camera on the James Clerk Maxwell Telescope (JCMT), were centred on a prominent large-scale structure over-density which includes a rich X-ray cluster at z = 0.73. A total of 50 millimetre galaxy candidates, with a significance ranging from 3.5-8.5 sigma, are extracted from the central 0.15 sq. deg. area which has a uniform sensitivity of 1.3 mJy/beam. Sixteen sources are detected with S/N > 4.5, where the expected false-detection rate is zero, of which a surprisingly large number (9) have intrinsic (de-boosted) fluxes > 5 mJy at 1.1 mm. Assuming the emission is dominated by radiation from dust, heated by a massive population of young, optically-obscured stars, then these bright AzTEC sources have FIR luminosities > 6 x 10^12 L(sun) and star formation-rates > 1100 M(sun)/yr. Two of these nine bright AzTEC sources are found towards the extreme peripheral region of the X-ray cluster, whilst the remainder are distributed across the larger-scale over-density. We describe the AzTEC data reduction pipeline, the source-extraction algorithm, and the characterisation of the source catalogue, including the completeness, flux de-boosting correction, false-detection rate and the source positional uncertainty, through an extensive set of Monte-Carlo simulations. We conclude with a preliminary comparison, via a stacked analysis, of the overlapping MIPS 24 micron data and radio data with this AzTEC map of the COSMOS field.
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