ROSATNEP ivo://nasa.heasarc/rosnepxray NASA/GSFC HEASARC Henry et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the ROSAT North Ecliptic Pole (NEP) Survey X-Ray Source Catalog. The sky around the NEP, at RA (J2000.0) = 18h00m00s, Declination (J2000.0) = +66d33'39", has the deepest exposure of the entire ROSAT All-Sky Survey (RASS). The NEP is an undistinguished region of moderate Galactic latitude, b = 29.8 degrees, and hence it is suitable for compiling statistical samples of both Galactic and extragalactic objects. The authors have made such a compilation in the 80.6 square degrees region surrounding the NEP. Their 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. They find 442 unique sources above a flux limit ~2 x 10<sup>-14</sup> ergs cm<sup>-2</sup> s<sup>-1</sup> in the 0.5-2.0 keV band. In this table, the X-ray properties of these sources as determined from the RASS are presented. These include positions, fluxes, spectral information in the form of hardness ratios, and angular sizes. This table was created by the HEASARC in February 2006 based on a machine-readable version of Table 4 in the above paper which was obtained from the electronic ApJ website. This is a service provided by NASA HEASARC . 2006ApJS..162..304H https://heasarc.gsfc.nasa.gov/W3Browse/all/rosnepxray.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=rosnepxray& GET text/xml 180 99999 true 260.42666667 62.01 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=rosnepxray GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_rosnepxray&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ROSAT 0.0333333333333333 X-ray public rosnepxray ROSAT North Ecliptic Pole Survey X-Ray Source Catalog name ROSAT Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable count_rate Net (0.1-2.4 keV) Count Rate ct/s phot.count;em.X-ray.soft double nullable count_rate_error The 1-sigma Error in Count Rate ct/s stat.error;phot.count;em.X-ray.soft double nullable flux Total Observed 0.5-2 keV Unabsorbed Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable redshift Spectroscopic Redshift src.redshift double nullable hr_2 Hardness Ratio 2 double nullable size_correction Size Correction double nullable hr_1 Hardness Ratio 1 double nullable nep_scan ROSAT North Ecliptic Pole Survey Source Number short nullable likelihood_diff Difference in Existence Likelihoods short nullable source_extent Sigma of the Source Extent arcsec short nullable ml_likelihood Existence Likelihood from Maximum Likelihood Analysis short nullable exposure Equivalent On-Axis Exposure Time (s) s time.duration;obs.exposure int nullable lii Galactic Longitude degree pos.galactic.lon double nullable mdetect_likelihood Existence Likelihood from MDETECT Analysis short nullable source_type Optical Identification Class src.class char nullable class Browse Object Classification src.class short nullable lx Total Rest 0.5-2 keV Luminosity (erg/s) erg/s double nullable bii Galactic Latitude degree pos.galactic.lat double nullable nh Hydrogen Column Density H-atoms/cm^2 phys.columnDensity double nullable spectral_parameter Unabsorbed Spectrum Parameter, Temperature in keV or Photon Index float nullable hr_2_error The 1-sigma Error in Hardness Ratio 2 double nullable hr_1_error The 1-sigma Error in Hardness Ratio 1 double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable