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dc.contributor.author | Ceballos, María Teresa | - |
dc.contributor.author | Barcons, Xavier | - |
dc.contributor.author | Carrera, Francisco J. | - |
dc.date.accessioned | 2018-09-24T10:57:50Z | - |
dc.date.available | 2018-09-24T10:57:50Z | - |
dc.date.issued | 1997 | - |
dc.identifier | doi: 10.1093/mnras/286.1.158 | - |
dc.identifier | issn: 0035-8711 | - |
dc.identifier | e-issn: 1365-2966 | - |
dc.identifier.citation | Monthly Notices of the Royal Astronomical Society 286(1): 158-162 (1997) | - |
dc.identifier.uri | http://hdl.handle.net/10261/170100 | - |
dc.description.abstract | We have carried out a fluctuation analysis in four bands (R4, R5, R6 and R7 corresponding to 0.44-1.01,0.56-1.21,0.73-1.56 and 1.05-2.04 keV respectively) of two very deep ROSA T Position Sensitive Proportional Counter (PSPC) observations in directions where the Galactic H I column is minimal. This has enabled us to study the average spectrum of the sources contributing to 0.5-2 keV fluxes ∼ 10-15 erg cm-2 s-1. The best-fitting spectral energy index for the average faint source spectrum, α = 0.95-0.15 +0.10, is still steeper than the one measured for the extragalactic X-ray background (XRB) at these energies α ∼ 0.4-0.7, but flatter than the typical active galactic nuclei (AGNs) spectral index α ∼ 1-1.5. This result has allowed us to constrain the existence of a population of sources harder than the AGNs contributing to the source counts at these fluxes. We find that a population of X-ray sources with energy spectral index α ∼ 0.4-0.6 would contribute (30 ± 20) per cent to the source counts at these fluxes if the rest of them are AGNs with energy spectral index α ∼ 1.2. | - |
dc.description.sponsorship | Partial financial support for this work was provided by the DGICYT under project PB92-0501. | - |
dc.publisher | Royal Astronomical Society | - |
dc.publisher | Oxford University Press | - |
dc.relation.isversionof | Publisher's version | - |
dc.rights | openAccess | - |
dc.subject | X-ray general | - |
dc.subject | Methods: statistical | - |
dc.subject | Galaxies: active | - |
dc.subject | Diffuse radiation | - |
dc.title | The colour of the deep ROSAT X-ray sky fluctuations | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1093/mnras/286.1.158 | - |
dc.relation.publisherversion | https://doi.org/10.1093/mnras/286.1.158 | - |
dc.date.updated | 2018-09-24T10:57:50Z | - |
dc.description.version | Peer Reviewed | - |
dc.language.rfc3066 | eng | - |
dc.contributor.funder | Dirección General de Investigación Científica y Técnica, DGICT (España) | - |
dc.relation.csic | Sí | - |
dc.identifier.funder | http://dx.doi.org/10.13039/501100008737 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
item.fulltext | With Fulltext | - |
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colofluc.pdf | 603,9 kB | Adobe PDF | Visualizar/Abrir |
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