Book contents
- Frontmatter
- Contents
- Index of Participants
- Preface
- I Evidence and Implications of Anisotropy in AGN
- II Luminosity Functions and Continuum Energy Distributions
- Radio Luminosity Functions of Active Galaxies
- The Quasar Luminosity Function
- UK ROSAT Deep & Extended Deep Surveys
- Luminosity Dependence of Optical Activity in Radio Galaxies
- Modelling the Quasar Luminosity Function in Hierarchical Models for Structure Formation
- Active Galactic Nuclei in Clusters of Galaxies
- Clustering Properties of AGNs and their Contribution to the X-ray Background
- Energy Distributions of AGN
- Absorption in the ROSAT X-ray Spectra of Quasars
- Dust in AGNs
- First Simultaneous UBVRI Photopolarimetric Observations of a Sample of Normal Quasars
- Intermediate Resolution Spectropolarimetry of Three Quasars
- Active Galaxies which Emit Strongly at 25μm
- III The Broad Line Region: Variability and Structure
- IV X-rays and Accretion Disks
- V Beams, Jets and Blazars
- VI Concluding Talk
UK ROSAT Deep & Extended Deep Surveys
from II - Luminosity Functions and Continuum Energy Distributions
Published online by Cambridge University Press: 04 August 2010
- Frontmatter
- Contents
- Index of Participants
- Preface
- I Evidence and Implications of Anisotropy in AGN
- II Luminosity Functions and Continuum Energy Distributions
- Radio Luminosity Functions of Active Galaxies
- The Quasar Luminosity Function
- UK ROSAT Deep & Extended Deep Surveys
- Luminosity Dependence of Optical Activity in Radio Galaxies
- Modelling the Quasar Luminosity Function in Hierarchical Models for Structure Formation
- Active Galactic Nuclei in Clusters of Galaxies
- Clustering Properties of AGNs and their Contribution to the X-ray Background
- Energy Distributions of AGN
- Absorption in the ROSAT X-ray Spectra of Quasars
- Dust in AGNs
- First Simultaneous UBVRI Photopolarimetric Observations of a Sample of Normal Quasars
- Intermediate Resolution Spectropolarimetry of Three Quasars
- Active Galaxies which Emit Strongly at 25μm
- III The Broad Line Region: Variability and Structure
- IV X-rays and Accretion Disks
- V Beams, Jets and Blazars
- VI Concluding Talk
Summary
Abstract
We present early results from the UK ROSAT Deep and Extended Deep Surveys. A total of 240 faint X-ray sources have been detected, most of which are expected to be QSOs and Seyfert galaxies at redshifts z < 3, although normal galaxies and starburst galaxies are also present. We will use these surveys, together with our parallel VLA 20cm & 6cm radio surveys and multicolour optical CCD surveys, to determine the evolution of the faint end of the X-ray and optical luminosity functions (LF) of QSOs, study the multiwaveband emission mechanisms of QSOs, map their distribution over a ‘wedge’ of high redshift sky, and investigate the X-ray evolution of distant clusters of galaxies.
The Multiwaveband Surveys.
The ROSAT survey was performed in a region of high-latitude sky of very low, and uniform, Galactic column density (71019 cm−2), as determined by our 21cm and IRAS 100µm measurements. The deep survey reaches a limiting X-ray flux of 410−15 erg cm−2s−1 (0.5–2keV) over a 40 arcmin diameter region of sky and contains 96 faint X-ray sources. The extended survey stretches over a 4° × 40 arcmin strip starting from the position of the deep survey, with a limiting flux of 10−14 erg cm−2s−1 (0.5–2 keV).
Deep VLA radio maps at 20cm (and at 6cm in the deep survey area only) have been constructed to flux limits of 0.5 mJy on the deep survey field and 2mJy on the extended survey.
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- The Nature of Compact Objects in Active Galactic NucleiProceedings of the 33rd Herstmonceux Conference, held in Cambridge, July 6-22, 1992, pp. 118 - 120Publisher: Cambridge University PressPrint publication year: 1994