CaltechAUTHORS
  A Caltech Library Service

Deep ROSAT Surveys & the contribution of AGNs to the soft X-ray background

Lehmann, I. and Hasinger, G. and Schmidt, M. and Gunn, J. E. and Schneider, D. P. and Giacconi, R. and McCaughrean, M. and Trümper, J. and Zamorani, G. (2001) Deep ROSAT Surveys & the contribution of AGNs to the soft X-ray background. In: X-ray astronomy: stellar endpoints, AGN, and the diffuse x-ray background. AIP Conference Proceedings. No.599. American Institute of Physics , Melville, N.Y., pp. 189-198. ISBN 0-7354-0043-1 http://resolver.caltech.edu/CaltechAUTHORS:20111118-092145577

[img]
Preview
PDF - Published Version
See Usage Policy.

1536Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20111118-092145577

Abstract

The ROSAT Deep Surveys in the Lockman Hole have revealed that AGNs are the main contributors (~75%) to the soft X-ray background in the 1–2 keV band. Using new optical/infrared and radio observations we have obtained a nearly complete identification (93%) of the 91 X-ray sources down to a limiting flux of 1.2·10^(–15) erg cm^(–2) s^(–1) in the 0.5–2.0 keV band. We present the optical colors and the emission line properties of our AGNs in comparison with other X-ray selected AGN samples. Furthermore we discuss the fraction of red AGNs found in the ROSAT Deep Surveys. From the ROSAT Deep Surveys we see no evidence for a new class of X-ray bright galaxies, which significantly contributes to the soft X-ray background.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.1434632DOIUNSPECIFIED
http://link.aip.org/link/?APCPCS/599/189/1PublisherUNSPECIFIED
Additional Information:© 2001 American Institute of Physics. Issue Date: 5 December 2001. We acknowledge the support in part by NASA grants NAG5-1531 (M.S.), NAG8-794, NAG5-1649, and NAGW-2508 (R.G.), and NSF grant AST-9509919 (D.S.). G.H. acknowledges the grant FKZ 50 OR 9908 0 by the Deutsches Zebtrum fur Luftund Raumfahrt e.V. (DLR). G.Z. acknowledges partial support by the Italian Space Agency (ASI) under contract ARS-96-70 and the Italian Ministry for University and Research (MURST) under grant Cofin 98-02-32.
Funders:
Funding AgencyGrant Number
NASANAG5-1531
NASANAG8-794
NASANAG5-1649
NASANAGW-2508
NSFAST-9509919
Deutsches Zentrum für Luft und RaumfahrtFKZ 50 OR 9908
Italian Space Agency (ASI)ARS-96-70
Italian Ministry for University and Research (MURST)Cofin 98-02 32
Subject Keywords:galactic nuclei, X-ray sources (astronomical), cosmic background radiation, astronomical atlases, astronomical catalogues. Surveys-galaxies: active-Galaxies: Seyferts-quasars: emission lines-X-rays: galaxies.
Classification Code:PACS: 98.62.Js; 98.70.Qy; 98.70.Vc; 95.80.+p
Record Number:CaltechAUTHORS:20111118-092145577
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20111118-092145577
Official Citation:Deep ROSAT Surveys & the contribution of AGNs to the soft X-ray background I. Lehmann, G. Hasinger, M. Schmidt, J. E. Gunn, D. P. Schneider, R. Giacconi, M. McCaughrean, J. Trumper, and G. Zamorani, AIP Conf. Proc. 599, 189 (2001), DOI:10.1063/1.1434632
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27849
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:21 Nov 2011 16:03
Last Modified:26 Dec 2012 14:25

Repository Staff Only: item control page