35 citations · 251 across the 15 of their papers we have counts for
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The XMM-Newton Survey Science Centre Medium Sensitivity Survey
X. Barcons, F. J. Carrera, M. T. Ceballos +5
We present preliminary results on the XMM-Newton Survey Science Centre medium sensitivity survey (XMS), with 0.5-4.5 keV flux limit 2 10^{-14} erg/cm2/s. At present, 19 fields have…
The gaseous extent of galaxies and the origin of Lyman alpha absorption systems. IV: Lyman alpha absorbers arising in a galaxy group
A. Ortiz-Gil, K. M. Lanzetta, J. K. Webb +2
We present new GHRS observations of Lyman alpha absorption lines associated with a group of galaxies towards the QSO 1545+2101. We have identified eight distinct Lyman alpha absorp…
The Gaseous Extent of Galaxies and The Origin of QSO Absorption Line Systems
H. -W. Chen, K. M. Lanzetta, J. K. Webb +2
We present results of an ongoing program to study the gaseous extent of galaxies and the origin of QSO absorption line systems. For \lya absorption systems, we find that absorption…
Clustering of X-ray selected Active Galactic Nuclei
F. J. Carrera, X. Barcons, A. C. Fabian +5
A total of 235 Active Galactic Nuclei (AGN) from two different soft X-ray surveys (the ROSAT Deep Survey -DRS- and the ROSAT International X-ray Optical Survey -RIXOS-) with redshi…
A new X-ray mission to measure the power spectrum of fluctuations in the Universe
X. Barcons, A. C. Fabian
We propose a new, simple, dedicated X-ray mission to measure the power spectrum of density fluctuations in the Universe, by accurately mapping the X-ray background on the whole sky…
Fluctuations in the diffuse X-ray background observed with Ginga
J. A. Butcher, G. C. Stewart, R. S. Warwick +6
We present Ginga measurements of the spatial fluctuations in the diffuse X-ray background. When combined with earlier results, the new data constrain the extragalactic log N - log…