The SCUBA half-degree extragalactic survey - II. Submillimetre maps, catalogue and number counts-猫眼课题宝

DOI：

10.1111/j.1365-2966.2006.10961.x

发表时间：

2006-09

期刊：

Scopus

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中科院分区：

其他

文献类型：

作者：

K. Coppin;E. Chapin;A. Mortier;S. Scott;C. Borys;J. Dunlop;M. Halpern;D. Hughes;A. Pope;D. Scott;S. Serjeant;J. Wagg;D. Alexander;O. Almaini;I. Aretxaga;T. Babbedge;P. Best;A. Blain;S. Chapman;D. Clements;M. Crawford;L. Dunne;L. Dunne;S. Eales;A. Edge;D. Farrah;E. Gaztañaga;W. Gear;G. Granato;T. Greve;M. Fox;R. Ivison;M. Jarvis;T. Jenness;C. Lacey;K. Lepage;R. Mann;G. Marsden;A. Martínez-Sansigre;S. Oliver;M. Page;J. Peacock;C. Pearson;W. Percival;R. Priddey;S. Rawlings;M. Rowan‐Robinson;R. Savage;M. Seigar;K. Sekiguchi;Laura Silva;C. Simpson;C. Simpson;I. Smail;J. Stevens;T. Takagi;Mattia Vaccari;Mattia Vaccari;E. V. Kampen;E. V. Kampen;C. Willott

我们目前的地图，源目录和数量计数的最大的，最完整的和公正的河外亚毫米级调查：850 μm潜水半度河外调查（阴影）。利用詹姆斯·克拉克麦克斯韦望远镜（JCMT）上的亚毫米波公共用户测辐射热仪阵列（SCUBA），SHADES绘制了两个独立的天空区域：斯巴鲁/XMM-牛顿深场（SXDF）和洛克曼洞东（LH）。这些SCUBA地图涵盖了所获得的全部数据（即截至2004年2月1日的数据）的93%，覆盖范围为720弧分2，均方根噪声水平约为2毫焦年，并发现了100个以上的亚毫米星系。为了确保所产生的源目录的最大鲁棒性，SHADES团队内的四个小组独立进行了数据简化，相对于文献中的其他SCUBA目录，提供了前所未有的可靠性。将四个组的各个来源列表合并起来，生成了一个强大的包含120个对象的SHADES目录;这是旨在研究完整且一致的亚毫米星系样本属性的后续活动的宝贵资源。对于第一次，我们提出了在一个大型调查中发现的每个亚毫米星系的流量密度。每个小组分别进行了广泛的模拟和测试，以确认候选源的鲁棒性，并评估错误检测、完整性和通量密度提升的影响。然后对这些影响进行校正，以获得亚毫米星系源计数。SHADES有足够多的检测源，可以估计有意义的微分计数，不像大多数亚毫米测量必须考虑积分计数。我们提出了微分和积分源数计数，并发现微分计数是更好地配合一个破碎的幂律或Schechter函数比一个单一的幂律;单独的SHADES数据显着表明，需要在几个兆焦耳的休息，虽然确切的位置休息没有很好的约束。我们还发现，一个850 μm的调查完成了2 mJy将解决20- 30%的远红外背景点源。

We present maps, source catalogue and number counts of the largest, most complete and unbiased extragalactic submillimetre survey: the 850-μm SCUBA Half-Degree Extragalactic Survey (SHADES). Using the Submillimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT), SHADES mapped two separate regions of sky: the Subaru/XMM–Newton Deep Field (SXDF) and the Lockman Hole East (LH). Encompassing 93 per cent of the overall acquired data (i.e. data taken up to 2004 February 1), these SCUBA maps cover 720 arcmin2 with a rms noise level of about 2 mJy and have uncovered >100 submillimetre galaxies. In order to ensure the utmost robustness of the resulting source catalogue, data reduction was independently carried out by four subgroups within the SHADES team, providing an unprecedented degree of reliability with respect to other SCUBA catalogues available from the literature. Individual source lists from the four groups were combined to produce a robust 120-object SHADES catalogue; an invaluable resource for follow-up campaigns aiming to study the properties of a complete and consistent sample of submillimetre galaxies. For the first time, we present deboosted flux densities for each submillimetre galaxy found in a large survey. Extensive simulations and tests were performed separately by each group in order to confirm the robustness of the source candidates and to evaluate the effects of false detections, completeness and flux density boosting. Corrections for these effects were then applied to the data to derive the submillimetre galaxy source counts. SHADES has a high enough number of detected sources that meaningful differential counts can be estimated, unlike most submillimetre surveys which have to consider integral counts. We present differential and integral source number counts and find that the differential counts are better fit with a broken power law or a Schechter function than with a single power law; the SHADES data alone significantly show that a break is required at several mJy, although the precise position of the break is not well constrained. We also find that a 850-μm survey complete down to 2 mJy would resolve 20–30 per cent of the far-infrared background into point sources.

The SCUBA half-degree extragalactic survey - II. Submillimetre maps, catalogue and number counts

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