The XMM-Newton Wide Angle Survey (XWAS)

The XMM-Newton Wide Angle Survey (XWAS)
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XMM-牛顿广角测量 (XWAS)

DOI:
10.1051/0004-6361/201218832
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发表时间:
2013
影响因子:
6.5
通讯作者:
Esquej P
Esquej P
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Esquej P

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目标:该方案旨在获得迄今为止已查明的活动星系核中最大的X射线选定样本之一,以便在宇宙大部分吸积力的起源地----中等通量处对这类星系核进行采样。我们提出了XMM-Newton广角巡天(XWAS),一个新的目录近千X射线源光谱确定通过光学观测。X射线源的光学对应物和相应的光度测定是从超级宇宙巡天获得的。光谱学的候选者最初被选择为幅度低至R ~ 21,优先选择通量F0.5 −4.5 keV≥ 10- 14 erg s-1cm-2的X射线源。利用英澳望远镜的2度视场进行了光谱观测,并根据光谱的发射谱线对观测结果进行了分类.结果:通过光谱观测,在天空Ω ~ 11.8 ° 2范围内共识别出940个X射线源.在我们的样本中的源种群可以概括为65%的宽线活动星系核(BLAGN),16%的窄发射线星系(NELG),6%的吸收线星系(ALG)和13%的恒星。一个活跃的原子核也可能存在于绝大多数X射线源光谱分类为NELG或ALG。源位于高银河纬度(|B|> 20度)XMM-牛顿场主要分布在南半球。由于XWAS涵盖了红移(0 ≤z≤ 4.25)和通量(10-15≤F0.5 - 4.5 keV≤ 10- 12 erg s-1cm-2)的大参数空间,这项工作为进一步研究子样本和特定情况提供了极好的资源。本文介绍了河外天体的总体性质。这些包括红移和光度分布,光学和X射线的颜色和X射线光通量比。
Aims.This programme is aimed at obtaining one of the largest X-ray selected samples of identified active galactic nuclei to date in order to characterise such a population at intermediate fluxes, where most of the Universe’s accretion power originates. We present theXMM-NewtonWide Angle Survey (XWAS), a new catalogue of almost a thousand X-ray sources spectroscopically identified through optical observations.Methods.A sample of X-ray sources detected in 68XMM-Newtonpointed observations was selected for optical multi-fibre spectroscopy. Optical counterparts and corresponding photometry of the X-ray sources were obtained from the SuperCOSMOS Sky Survey. Candidates for spectroscopy were initially selected with magnitudes down toR~ 21, with preference for X-ray sources having a fluxF0.5−4.5 keV≥ 10-14erg s-1cm-2. Optical spectroscopic observations were made using the Two Degree Field of the Anglo Australian Telescope, and the resulting spectra were classified based on optical emission lines.Results.We have identified through optical spectroscopy 940 X-ray sources over Ω ~ 11.8 deg2of the sky. Source populations in our sample can be summarised as 65% broad line active galactic nuclei (BLAGN), 16% narrow emission line galaxies (NELGs), 6% absorption line galaxies (ALGs) and 13% stars. An active nucleus is also likely to be present in the large majority of the X-ray sources spectroscopically classified as NELGs or ALGs. Sources lie in high-galactic latitude (|b| > 20 deg)XMM-Newtonfields mainly in the southern hemisphere. Owing to the large parameter space in redshift (0 ≤z≤ 4.25) and flux (10-15≤F0.5 − 4.5 keV≤ 10-12erg s-1cm-2) covered by the XWAS this work provides an excellent resource for the further study of subsamples and particular cases. The overall properties of the extragalactic objects are presented in this paper. These include the redshift and luminosity distributions, optical and X-ray colours and X-ray-to-optical flux ratios.
XMM-牛顿/斯隆数字巡天场中的 X 射线明亮光学不活跃星系:稀释程度大于吸收程度?
DOI: --
发表时间: 2004
期刊:
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作者:
I. Georgantopoulos;A. Georgakakis
通讯作者: A. Georgakakis
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发表时间: 2006
期刊:
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作者:
M. Zombeck
通讯作者: M. Zombeck
格罗斯带的深度钱德拉调查 – X 射线源的光学识别。
DOI: --
发表时间: 2006
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作者:
A. Georgakakis;K. Nandra;E. Laird;S. Gwyn;C. Steidel;V. Sarajedini;P. Barmby;S. Faber;A. Coil;M. Cooper;M. Davis;J. A. N. I. College;UCOLick;Victoria;Caltech;Florida;Cfa;Steward Observatory;Berkeley
通讯作者: Berkeley
DOI: 10.1086/444378
发表时间: 2005
期刊: The Astrophysical Journal Supplement Series
影响因子: --
作者:
S. Murray;A. Kenter;W. Forman;C. Jones;P. Green;C. Kochanek;A. Vikhlinin;D. Fabricant;G. Fazio;K. Brand;Michael J. I. Brown;A. Dey;B. Jannuzi;J. Najita;B. McNamara;J. Shields;M. Rieke
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XMM-牛顿偶然介质通量源的 X 射线谱
DOI: --
发表时间: 2004
期刊:
影响因子: --
作者:
S. Mateos;X. Barcons;F. Carrera;M. Ceballos;A. Caccianiga;G. Lamer;T. Maccacaro;M. Page;A. Schwope;M. Watson
通讯作者: M. Watson