Skip to main content Accessibility help
×
Home
Hostname: page-component-99c86f546-7c2ld Total loading time: 0.554 Render date: 2021-11-28T16:09:02.443Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true, "newUsageEvents": true }

UK ROSAT Deep & Extended Deep Surveys

from II - Luminosity Functions and Continuum Energy Distributions

Published online by Cambridge University Press:  04 August 2010

L.R. Jones
Affiliation:
University of Southampton
I.M. McHardy
Affiliation:
University of Southampton
M. Merrifield
Affiliation:
University of Southampton
G. Branduardi-Raymont
Affiliation:
M.S.S.L.
K.O. Mason
Affiliation:
M.S.S.L.
P.J. Smith
Affiliation:
M.S.S.L.
M. Rowan-Robinson
Affiliation:
Queen Mary & Westfield
M.H. Jones
Affiliation:
Queen Mary & Westfield
A. Lawrence
Affiliation:
Queen Mary & Westfield
G.P. Efstathiou
Affiliation:
Oxford University
T.J. Ponman
Affiliation:
Birmingham Univeristy
P. Willmore
Affiliation:
Birmingham Univeristy
D. Allan
Affiliation:
Birmingham Univeristy
A. Jeffries
Affiliation:
Birmingham Univeristy
J. Quenby
Affiliation:
Imperial College
H. Lehto
Affiliation:
Turku University
G. Luppino
Affiliation:
University of Hawaii
J. Pye
Affiliation:
Leicester University
C. Page
Affiliation:
Leicester University
A. Pedlar
Affiliation:
Jodrell Bank
Andrew Robinson
Affiliation:
University of Cambridge
Roberto Juan Terlevich
Affiliation:
Royal Greenwich Observatory, Cambridge
Get access

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.

Type
Chapter
Information
The Nature of Compact Objects in Active Galactic Nuclei
Proceedings of the 33rd Herstmonceux Conference, held in Cambridge, July 6-22, 1992
, pp. 118 - 120
Publisher: Cambridge University Press
Print publication year: 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Send book to Kindle

To send this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Send book to Dropbox

To send content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Dropbox.

Available formats
×

Send book to Google Drive

To send content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Google Drive.

Available formats
×