X-ray Line Emitting Objects in XMM-Newton Observations: the Tip of the Iceberg

Abstract

We present preliminary results from a novel search for X-ray Line Emitting Objects (XLEOs) in XMM-Newton images. Three sources have been detected in a test-run analysis of 13 XMM-Newton observations. The three objects found are most likely extremely absorbed AGN characterized by a column density NH~10^24cm^-2. Their redshift has been directly determined from the X-ray data, by interpreting the detected emission line as the 6.4 keV Fe line. The measured equivalent width of the X-ray line is, in all three cases, several keV. This pilot study demonstrates the success of our search method and implies that a large sample of XLEOs can be obtained from the public XMM-Newton data archive.

arXiv comment10 pages, 3 figures, accepted for publication in ApJ Letters

References in corpus (11)

• The Evolution of X-ray Clusters of Galaxies
• The ROSAT Deep Cluster Survey: the X-ray Luminosity Function out to z=0.8
• The HELLAS2XMM survey: IV. Optical identifications and the evolution of the accretion luminosity in the Universe
• Elusive Active Galactic Nuclei
• Chandra and XMM-Newton Observations of RDCS1252.9-2927, A Massive Cluster at z=1.24
• The AGN contribution to mid-infrared surveys
• XMM-Newton observations expose AGN in apparently normal galaxies
• A FIRST DETERMINATION OF THE SURFACE DENSITY OF GALAXY CLUSTERS AT VERY LOW X--RAY FLUXES
• Extreme X-ray Iron Lines in Active Galactic Nuclei
• An enshrouded AGN in the merging starburst system Arp~299 revealed by BeppoSAX
• Probing the hard X-ray properties of high-redshift Radio-Quiet Quasars with ASCA

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• An X-ray bright ERO hosting a type 2 QSO
• The XMM-Newton view of the relativistic spectral features in AXJ0447-0627
• The first optical validation of an XLEO: a detection in the XMM-Newton observation of the CDFS
• X-Ray Redshifts of Obscured Chandra Source Catalog AGN
• LBT-MODS spectroscopy of high-redshift candidates in the Chandra J1030 field. A newly discovered z$\sim$2.8 large scale structure