X ray background (16 Ergebnisse)

Hardcover. Zustand: Very Good. pp.xiii, 310 pages, many figures in the text, a very good plus hardback, publisher's two-tone imitation cloth, from a uk university library [0521416515].

Zustand: New. In.

Astophysics, abstract, astro-ph, 1998, format A4, spirale, 14+13+10 pages Bon état - Pour les envois hors de France, la tafication «livre & brochure» pour les frais de port a disparue.Les frais de port annoncés correspondent à une moyenne. Ils seront calculés au plus juste en fonction du poids de votre article.…

Zustand: Very Good. 324 pp., hardcover, previous owner's name to front pastedown, a few page corners bent else very good. - If you are reading this, this item is actually (physically) in our stock and ready for shipment once ordered. We are not bookjackers. Buyer is responsible for any additional duties, taxes, or fees required by recipient's country.…

Zustand: Gebraucht / Used. 1976. Pap. 123pp. 8°. Diss./Thesis.

Taschenbuch. Zustand: Neu. Neuware - In order to isolate the diffuse extragalactic component of the soft X-ray background, we have used a combination of ROSAT All-Sky Survey and IRAS 100 micron data to separate the soft X-ray background into five components. We find a Local Hot Bubble similar to that described by Snowden et al (1998). We make a first calculation of the contribution by unresolved Galactic stars to the diffuse background. We constrain the normalization of the Extragalactic Power Law (the contribution of the unresolved extragalactic point sources such as AGN, QSO'S, and normal galaxies) to 9.5 +/- 0.9 keV/(sq cm s sr keV), assuming a power-law index of 1.46. We show that the remaining emission, which is some combination of Galactic halo emission and the putative diffuse extragalactic emission, must be composed of at least two components which we have characterized by thermal spectra. The softer component has log T - 6.08 and a patchy distribution; thus it is most probably part of the Galactic halo. The harder component has log T - 6.46 and is nearly isotropic; some portion may be due to the Galactic halo and some portion may be due to the diffuse extragalactic emission. The maximum upper limit to the strength of the emission by the diffuse extragalactic component is the total of the hard component, approx. 7.4 +/- 1.0 keV/(sq cm s sr keV) in the 3/4 keV band. We have made the first direct measure of the fluctuations due to the diffuse extragalactic emission in the 3/4 keV band. Physical arguments suggest that small angular scale (approx. 10') fluctuations in the Local Hot Bubble or the Galactic halo will have very short dissipation times (about 10(exp 5) years). Therefore, the fluctuation spectrum of the soft X-ray background should measure the distribution of the diffuse extragalactic emission. Using mosaics of deep, overlapping PSPC pointings, we find an autocorrelation function value of approx. 0.0025 for 10'.…

Kartoniert / Broschiert. Zustand: New. KlappentextrnrnIn order to isolate the diffuse extragalactic component of the soft X-ray background, we have used a combination of ROSAT All-Sky Survey and IRAS 100 micron data to separate the soft X-ray background into five components. We find .

Zustand: New. In.

Zustand: New. In.

Couverture rigide. Zustand: bon. R260269729: 1973. In-8. Relié. Très bon état, Couv. convenable, Dos satisfaisant, Intérieur frais. 323 pages augmentées de quelques figures en noir et blanc dans texte. . . . Classification Dewey : 420-Langue anglaise. Anglo-saxon.

Hardcover. Zustand: sehr gut. Broschur, geklammert, 8°, 504 - 513 Seiten ,Stempel :"ausgeschieden",einwandfrei erhalten . Kein Eintrag. Astrophysics and Space Science 18 (1972). in englischer Sprache (in english).

Buch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - This thesis presents a study of the origin of an apparently extended X-ray emission associated with the Galactic ridge. The study was carried out with broadband spectra obtained from mapping observations in the Galactic bulge region conducted in 2005-2010 by the Suzaku space X-ray observatory. The spectra were analyzed with a newly constructed X-ray spectral model of an accreting white dwarf binary that is one of the proposed candidate stars for the origin of the Galactic ridge emission in the higher energy band. Fitting of the observed Galactic ridge spectra with the model showed that there is another spectral component that fills the gap between the observed X-ray flux and the component expected from the accreting white dwarf spectral model in the lower energy band. This additional soft spectral component was nicely explained by an X-ray spectral model of normal stars. The result, together with previously reported high-resolution imaging results, strongly supports the idea that the Galactic ridge X-ray emission is an assembly of dim, discrete X-ray point sources.…

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - This thesis presents a study of the origin of an apparently extended X-ray emission associated with the Galactic ridge. The study was carried out with broadband spectra obtained from mapping observations in the Galactic bulge region conducted in 2005-2010 by the Suzaku space X-ray observatory. The spectra were analyzed with a newly constructed X-ray spectral model of an accreting white dwarf binary that is one of the proposed candidate stars for the origin of the Galactic ridge emission in the higher energy band. Fitting of the observed Galactic ridge spectra with the model showed that there is another spectral component that fills the gap between the observed X-ray flux and the component expected from the accreting white dwarf spectral model in the lower energy band. This additional soft spectral component was nicely explained by an X-ray spectral model of normal stars. The result, together with previously reported high-resolution imaging results, strongly supports the idea that the Galactic ridge X-ray emission is an assembly of dim, discrete X-ray point sources.…

Hardcover. Zustand: Brand New. 154 pages. 9.25x6.25x0.50 inches. In Stock.

Taschenbuch. Zustand: Neu. Suzaku Studies of White Dwarf Stars and the Galactic X-ray Background Emission | Takayuki Yuasa | Taschenbuch | Springer Theses | xv | Englisch | 2015 | Springer | EAN 9784431547174 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu.…

Taschenbuch. Zustand: Neu. How Noise and Conversations effect X-Ray Baggage Screening Performance | An experiment with a highly relevant background | Katharina Becker | Taschenbuch | 52 S. | Englisch | 2017 | AV Akademikerverlag | EAN 9783639884654 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu. …