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Author: Tanaka, Y.
Publisher:
ISBN: 9784946443084
Category : X-ray astronomy
Languages : en
Pages : 723
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Book Description
Author: Tanaka, Y.
Publisher:
ISBN: 9784946443084
Category : X-ray astronomy
Languages : en
Pages : 723
Get Book Here
Book Description
Author: Tanaka, Y.
Publisher:
ISBN:
Category : X-ray astronomy
Languages : en
Pages : 752
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Book Description
Author: A. C. Fabian
Publisher: Cambridge University Press
ISBN: 9780521534871
Category : Science
Languages : en
Pages : 260
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Book Description
X-ray astronomy has undergone a revolution in recent years. With the launch of two orbiting observatories, Chandra and XMM-Newton, astronomers are now able to obtain spectra and images at a higher resolution than ever before. Observations have had a major impact on topics ranging from protostars to cosmology. The contributions in this 2004 work, by leading authorities in the field, originate from a Royal Society Discussion Meeting that was held to review results from the current generation of X-ray telescopes, and set them in context. This book is a valuable reference for research astronomers and graduate students wishing to understand the latest developments in this exciting field.
Author: United States. X-ray Astronomy Program Working Group
Publisher:
ISBN:
Category : X-ray astronomy
Languages : en
Pages : 96
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Book Description
Author: Willem Wamsteker
Publisher: Springer Science & Business Media
ISBN: 9401107947
Category : Science
Languages : en
Pages : 721
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Book Description
ROSAT Observations G. HASINGER Max-Planck-Institut flir extraterrestrische Physik, D-85740 Garching, Germany Abstract. This review describes the most recent advances in the study of the extragalactic soft X-ray background and what we can learn about its constituents. The deepest pointed observations with the ROSAT PSPC are discussed. The logN-logS relation is presented, which reaches to the faintest X-ray fluxes and to the highest AGN surface densities ever achieved. The N(>S) relation shows a 2 density in excess of 400 deg- at the faintest fluxes and a flattening below the Einstein Deep Survey limit. About 60% of the extragalactic background has been resolved in the deepest field. Detailed source spectra and first optical and radio identifications will be discussed. The results are put into perspective of the higher energy X -ray background. Key words: X-rays, background radiations, active galactic nuclei. 1. Introduction The extragalactic X-ray background (XRB), discovered about 30 years ago, has been studied extensively with many X-ray experiments, in particular with the satel lites HEAO I and II (see ego Boldt 1987) and with ROSAT (e. g. Hasinger et aI. , 1993). Figure 1 shows a compilation of some of the most recent spectral measure ments for the X-ray background. Over the energy range from 3 to about 100 keY its spectrum can be well approximated by an optically thin thermal bremsstrahlung model with kT ~ 40 keY, while at lower X-ray energies a steepening into a new component has been observed observed (e. g.
Author: Christine H. Russell
Publisher:
ISBN:
Category : X-ray astronomy
Languages : en
Pages : 104
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Book Description
Author: Xavier Barcons
Publisher: Cambridge University Press
ISBN: 9780521416511
Category : Nature
Languages : en
Pages : 328
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Book Description
A review of the current observational knowledge and understanding of the cosmic X-ray background.
Author: Qiushi Huang
Publisher: Frontiers Media SA
ISBN: 2832513182
Category : Science
Languages : en
Pages : 95
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Book Description
Author: United States. National Aeronautics and Space Administration. Gamma Ray Astronomy Program Working Group
Publisher:
ISBN:
Category : Electronic government information
Languages : en
Pages : 66
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Book Description
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Gamma rays
Languages : en
Pages : 76
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Book Description
