The XMM deep survey in the CDFS XI. X-ray properties of 185 bright sources

Abstract

We present X-ray spectra of 185 bright sources detected in the XMM-Newton deep survey of the Chandra Deep Field South, combining the three EPIC cameras. The 2-10 keV flux limit of the sample is 2e-15 erg/s/cm2. The sources are distributed over a redshift range of z=0.1-3.8. Eleven new X-ray redshift measurements are included. A spectral analysis was performed using a simple model to obtain absorbing column densities, rest-frame 2-10 keV luminosities and Fe K line properties of 180 sources at z>0.4. Obscured AGN are found to be more abundant toward higher redshifts. Using the XMM-Newton data alone, seven Compton-thick AGN candidates are identified, which makes the Compton-thick AGN fraction to be ~4%. An exploratory spectral inspection method with two rest-frame X-ray colours and an Fe line strength indicator is introduced and tested against the results from spectral fitting. This method works reasonably well to characterise a spectral shape and can be useful for a pre-selection of Compton-thick AGN candidates. We found six objects exhibiting broad Fe K lines out of 21 unobscured AGN of best data quality, implying a detection rate of ~30%. Five redshift spikes, each of which has more than six sources, are identified in the redshift distribution of the X-ray sources. Contrary to the overall trend, the sources at the two higher-redshift spikes at z=1.61 and z=2.57 have puzzlingly low obscuration.

arXiv commentAccepted for publication in Astronomy & Astrophysics. Table 1 and Fig. 2 are available in electronic form the CDS. Typos corrected and some language editing and references added

References in corpus (55)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• Cool Gas in High Redshift Galaxies
• The synthesis of the cosmic X-ray background in the Chandra and XMM-Newton era
• The Chandra Deep Field South: Optical Spectroscopy I
• Broad iron lines in Active Galactic Nuclei
• The Chandra Deep Field-South Survey: 7 Ms Source Catalogs
• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• Deep Extragalactic X-ray Surveys
• X-ray spectral properties of AGN in the Chandra Deep Field South
• Absorption Properties and Evolution of Active Galactic Nuclei
• Cosmic X-ray Surveys of Distant Active Galaxies: The Demographics, Physics, and Ecology of Growing Supermassive Black Holes
• The Great Observatories Origins Deep Survey. VLT/FORS2 Spectroscopy in the GOODS-South Field: Part III
• The Great Observatories Origins Deep Survey - VLT/VIMOS Spectroscopy in the GOODS-South Field: Part II
• The Multiwavelength Survey by Yale-Chile (MUSYC): Deep Medium-Band optical imaging and high quality 32-band photometric redshifts in the ECDF-S
• The Great Observatories Origins Deep Survey. VLT/VIMOS Spectroscopy in the GOODS-South Field
• CAIXA: a Catalogue of AGN In the XMM-Newton Archive I. Spectral analysis
• On the evolution of the molecular gas fraction of star forming galaxies
• The K20 survey. VII. The spectroscopic catalogue: spectral properties and evolution of the galaxy population
• High-redshift AGN in the Chandra Deep Fields: the obscured fraction and space density of the sub-$L_{\ast }$ population
• The Evolution of Obscuration in AGN
• The sub-mJy radio sky in the Extended Chandra Deep Field South: source population
• Identifications and Photometric Redshifts of the 2 Ms Chandra Deep Field-South Sources
• A Public, K-Selected, Optical-to-Near-Infrared Catalog of the Extended Chandra Deep Field South (ECDFS) from the MUltiwavelength Survey by Yale-Chile (MUSYC)
• The Extended Chandra Deep Field-South Survey: Optical spectroscopy of faint X-ray sources with the VLT and Keck
• On the Iwasawa-Taniguchi effect of radio-quiet AGN
• The XMM Deep survey in the CDFS I. First results on heavily obscured AGN
• 531 new spectroscopic redshifts from the CDFS and a test on the cosmological relevance of the GOODS-South field
• FERO: Finding Extreme Relativistic Objects. I. Statistics of Relativistic Fe Kalpha lines in Radio-Quiet Type 1 AGN
• An X-ray Baldwin effect for the narrow Fe K-alpha lines observed in Active Galactic Nuclei
• Constraining the fraction of Compton-thick AGN in the Universe by modelling the diffuse X-ray background spectrum
• The Arizona CDFS Environment Survey (ACES): A Magellan/IMACS Spectroscopic Survey of the Chandra Deep Field South
• GMASS ultradeep spectroscopy of galaxies at z~2 - VII. Sample selection and spectroscopy
• The XMM-Newton Serendipitous Survey. VI. The X-ray Luminosity Function
• The X-ray luminosity function of Active Galactic Nuclei in the redshift interval z=3-5
• X-ray spectral analyses of AGNs from the 7Ms Chandra Deep Field-South survey: the distribution, variability, and evolution of AGN's obscuration
• The XMM deep survey in the CDFS IV. Candidate Compton-thick AGN
• The Chandra COSMOS Legacy Survey: Compton Thick AGN at high redshift
• The HELLAS2XMM survey. V. Near-Infrared observations of X-ray sources with extreme X/O ratios
• A WFC3 Grism Emission Line Redshift Catalog in the GOODS-South Field
• XMM-Newton observations of the Lockman Hole: III. A relativistic Fe line in the mean X-ray spectra of type-1 and type-2 AGN
• ATLAS 1.4 GHz Data Release 2 -- I. Observations of the CDF-S and ELAIS-S1 fields and methods for constructing differential number counts
• Average Fe K-alpha emission from distant AGN
• Fe K emission from active galaxies in the COSMOS field
• The XMM deep survey in the CDF-S. IX. An X-ray outflow in a luminous obscured quasar at z~1.6
• The Iron Line Background
• Spectroscopic Characterisation of 250um-Selected Hyper-Luminous Star Forming Galaxies
• Rest-frame stacking of 2XMM catalog sources : Properties of the Fe Kalpha line
• The ATLAS 5.5 GHz Survey of the Extended Chandra Deep Field South: The Second Data Release
• The XMM-Newton deep survey in the CDF-S VI. Obscured AGN selected as infrared power-law galaxies
• The XMM Deep survey in the CDFS V. Iron K lines from active galactic nuclei in the distant Universe
• The XMM Deep Survey in the CDF-S VII. UV catalogue of the Optical Monitor observations
• The XMM deep survey in the CDF-S VIII. X-ray properties of the two brightest sources
• VANDELS consortium public database
• The XMM deep survey in the CDF-S. X. X-ray variability of bright sources

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• The 700 ks Chandra Spiderweb Field I: evidence for widespread nuclear activity in the Protocluster
• X-ray redshifts for obscured AGN: a case study in the J1030 deep field
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• Quasars as Standard Candles V. Evaluation of a $\le$ 0.06 dex intrinsic dispersion in the LX-LUV relation
• COSMOS2020: Investigating the AGN-obscured accretion phase at $z\sim 1$ via [NeV] selection
• Chandra Observations of Excess Fe K$\alpha$ Line Emission in Galaxies with High Star Formation Rates: X-ray Reflection on Galaxy Scales?
• Redshift identification of X-ray selected active galactic nuclei in the J1030 field: searching for large-scale structures and high-redshift sources
• X-Ray Redshifts of Obscured Chandra Source Catalog AGN
• Point source contribution to the Diffuse X-ray Background below 1 keV and its effect on our understanding of the circum-galactic medium
• LBT-MODS spectroscopy of high-redshift candidates in the Chandra J1030 field. A newly discovered z$\sim$2.8 large scale structure
• Shedding the envelope: JWST reveals a kiloparsec-scale [OIII]-weak Balmer shell around a z=7.64 quasar
• Self-consistent population synthesis of AGN from observational constraints in the X-rays