Search Publications
An XMM-Newton survey of broad iron lines in Seyfert galaxies
Nandra, K.; Reeves, J. N.; George, I. M. +1 more
We present an analysis of the X-ray spectra of a sample of 37 observations of 26 Seyfert galaxies observed by XMM-Newton in order to characterize their iron Kα emission. All objects show evidence for iron line emission in the 6-7 keV band. A narrow `core' at 6.4 keV is seen almost universally in the spectra, and we model this using a neutral Compt…
The Sloan Digital Sky Survey Quasar Catalog. IV. Fifth Data Release
Castander, Francisco J.; Brandt, W. N.; Shen, Yue +41 more
We present the fourth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog contains 77,429 objects; this is an increase of over 30,000 entries since the previous edition. The catalog consists of the objects in the SDSS Fifth Data Release that have luminosities larger than Mi=-22.0 (in a cosmology with H0…
The X-Ray Properties of the Most Luminous Quasars from the Sloan Digital Sky Survey
Brandt, W. N.; Garmire, G. P.; Chartas, G. +4 more
Utilizing 21 new Chandra observations as well as archival Chandra, ROSAT, and XMM-Newton data, we study the X-ray properties of a representative sample of 59 of the most optically luminous quasars in the universe (Mi~-29.3 to -30.2) spanning a redshift range of z~1.5-4.5. Our full sample consists of 32 quasars from the Sloan Digital Sky…
The XMM-Newton extended survey of the Taurus molecular cloud (XEST)
Audard, M.; Güdel, M.; Grosso, N. +18 more
Context: The Taurus Molecular Cloud (TMC) is the nearest large star-forming region, prototypical for the distributed mode of low-mass star formation. Pre-main sequence stars are luminous X-ray sources, probably mostly owing to magnetic energy release.
Aims: The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) presented in this p…
The XMM-Newton Wide-Field Survey in the COSMOS Field. I. Survey Description
Finoguenov, A.; Sanders, D. B.; Fiore, F. +21 more
We present the first set of XMM-Newton EPIC observations in the 2 deg2 COSMOS field. The strength of the COSMOS project is the unprecedented combination of a large solid angle and sensitivity over the whole multiwavelength spectrum. The XMM-Newton observations are very efficient in localizing and identifying active galactic nuclei (AGNs…
Dark matter maps reveal cosmic scaffolding
Refregier, Alexandre; Ellis, Richard; Mobasher, Bahram +17 more
Ordinary baryonic particles (such as protons and neutrons) account for only one-sixth of the total matter in the Universe. The remainder is a mysterious `dark matter' component, which does not interact via electromagnetism and thus neither emits nor reflects light. As dark matter cannot be seen directly using traditional observations, very little …
The XMM-Newton Wide-Field Survey in the COSMOS Field: Statistical Properties of Clusters of Galaxies
Finoguenov, A.; Böhringer, H.; Kneib, J. -P. +30 more
We present the results of a search for galaxy clusters in the first 36 XMM-Newton pointings on the Cosmic Evolution Survey (COSMOS) field. We reach a depth for a total cluster flux in the 0.5-2 keV band of 3×10-15 ergs cm-2 s-1, having one of the widest XMM-Newton contiguous raster surveys, covering an area of 2.1 …
The magnificent seven: magnetic fields and surface temperature distributions
Haberl, Frank
Presently seven nearby radio-quiet isolated neutron stars discovered in ROSAT data and characterized by thermal X-ray spectra are known. They exhibit very similar properties and despite intensive searches their number remained constant since 2001 which led to their name "The Magnificent Seven". Five of the stars exhibit pulsations in their X-ray f…
A black hole in a globular cluster
Kundu, Arunav; Zepf, Stephen E.; Maccarone, Thomas J. +1 more
Globular star clusters contain thousands to millions of old stars packed within a region only tens of light years across. Their high stellar densities make it very probable that their member stars will interact or collide. There has accordingly been considerable debate about whether black holes should exist in these star clusters. Some theoretical…
The representative XMM-Newton cluster structure survey (REXCESS) of an X-ray luminosity selected galaxy cluster sample
Zhang, Y. -Y.; Finoguenov, A.; Böhringer, H. +31 more
Context: The largest uncertainty for cosmological studies using clusters of galaxies is introduced by our limited knowledge of the statistics of galaxy cluster structure, and of the scaling relations between observables and cluster mass.
Aims: To improve on this situation we have started an XMM-Newton Large Programme for the in-depth study of …