The SCUBA-2 Large eXtragalactic Survey: 850µm map, catalogue and the bright-end number counts of the XMM- LSS field
The SCUBA-2 Large eXtragalactic Survey: 850µm map, catalogue and the bright-end number counts of the XMM- LSS field
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SCUBA-2 大型河外巡天：850 µm 地图、目录和 XMM-LSS 场的亮端计数
DOI：
10.1093/mnras/stad307
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发表时间：
2023
影响因子：
4.8
通讯作者：
Garratt T
中科院分区：
文献类型：
--
作者：
Garratt T
本文介绍了作为詹姆斯·克拉克麦克斯韦望远镜SCUBA-2大型银河系外巡天（S2LXS）观测170小时的XMM-LSS场的成像。S2LXSXMM-LSS绘制了一个区域，达到中等深度。这是迄今为止詹姆斯克拉克麦克斯韦望远镜（JCMT）绘制的河外天空中最大的连续区域。S2LXSXMM-LSS调查的广阔区域使我们能够探测超亮（），但罕见的亚毫米人口。我们给出了S2LXSXMM-LSS星表，它包括40个在> 5 σ显著性下探测到的源，其去增强的通量密度在-范围内。我们鲁棒地测量在通量密度下的计数器计数的亮端，与现有的测量相比，减少了泊松误差。S2LXSXMM-LSS观测到的数量计数显示出明亮通量的特征性上升，预计这是由当地的亚毫米辐射源和高红移强透镜星系引起的。我们发现，最好的重现的davednumber计数模型预测，包括强透镜或源混合从15弧秒的光束，这表明两者都可能作出重要贡献，所观察到的过剩的明亮的单碟选择源。我们把这里给出的S2LXSXMM-LSS图和> 5 σ星表公开提供给公众。
We presentimaging of theXMM-LSS field observed for 170 h as part of the James Clerk Maxwell Telescope SCUBA-2 Large eXtragalactic Survey (S2LXS). S2LXSXMM-LSS maps an area of, reaching a moderate depth of. This is the largest contiguous area of extragalactic sky mapped by James Clerk Maxwell Telescope (JCMT) atto date. The wide area of the S2LXSXMM-LSS survey allows us to probe the ultra-bright (), yet rare submillimetre population. We present the S2LXSXMM-LSS catalogue, which comprises 40 sources detected at >5σ significance, with deboosted flux densities in the range of–. We robustly measure the bright-end of thenumber counts at flux densities, reducing the Poisson errors compared to existing measurements. The S2LXSXMM-LSS observed number counts show the characteristic upturn at bright fluxes, expected to be motivated by local sources of submillimetre emission and high-redshift strongly lensed galaxies. We find that the observednumber counts are best reproduced by model predictions that include either strong lensing or source blending from a 15-arcsec beam, indicating that both may make an important contribution to the observed overabundance of bright single dishselected sources. We make the S2LXSXMM-LSSmap and >5σ catalogue presented here publicly available.