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J/ApJS/162/304 ROSAT NEP X-ray source catalog (Henry+, 2006)
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table4.dat
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Beginning of ReadMe :J/ApJS/162/304 ROSAT NEP X-ray source catalog (Henry+, 2006)
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The ROSAT North Ecliptic Pole survey: the X-ray catalog.
Henry J.P., Mullis C.R., Voges W., Bohringer H., Briel U.G., Gioia I.M.,
Huchra J.P.
<Astrophys. J. Suppl. Ser., 162, 304-328 (2006)>
=2006ApJS..162..304H
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ADC_Keywords: X-ray sources ; Surveys
Keywords: galaxies: active - galaxies: clusters: general - surveys -
X-rays: galaxies: clusters - X-rays: general - X-rays: stars
Abstract:
The sky around the North Ecliptic Pole (NEP), at 18:00:00+66:33:39,
has the deepest exposure of the entire ROSAT All-Sky Survey (RASS,
Cat. IX/10). The NEP is an undistinguished region of moderate
Galactic latitude, b=29.8deg, and hence suitable for compiling
statistical samples of both Galactic and extragalactic objects. We
have made such a compilation in the 80.6deg^2^ region surrounding
the NEP. Our sample fully exploits the properties of the RASS, since
the only criteria for inclusion are source position and significance,
and it yields the deepest large solid angle contiguous sample of X-ray
sources to date. We find 442 unique sources above a flux limit
2x10^-14^ergs/cm^2^/s in the 0.5-2.0keV band. In this paper we
present the X-ray properties of these sources as determined from the
RASS. These include positions, fluxes, spectral information in the
form of hardness ratios, and angular sizes. Since we have performed a
comprehensive optical identification program we also present the
average X-ray properties of classes of objects typical of the X-ray
sky at these flux levels. We discuss the use of the RASS to find
clusters of galaxies based on their X-ray properties alone.