ROSATNEPAGN ivo://nasa.heasarc/rosnepagn NASA/GSFC HEASARC Mullis et al. 2026-04-24 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov AGN The ROSAT North Ecliptic Pole (NEP) Survey of Active Galactic Nuclei (AGN) Catalog is an X-ray flux-limited sample of 219 AGN discovered in the contiguous 80.7 square degrees region of the ROSAT North Ecliptic Pole (NEP) Survey (Gioia et al. 2003, ApJS, 149, 29; <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/149/29">CDS Cat. <J/ApJS/149/29></a>). This catalog features complete optical identifications and spectroscopic redshifts. The median redshift, X-ray flux, and X-ray luminosity are z = 0.41, fx = 1.1 x 10<sup>-13</sup> erg/cm<sup>2</sup>/s, and Lx = 9.2 x 10<sup>43</sup> h70<sup>-2</sup> erg/s (0.5 - 2.0 keV), respectively. Unobscured Type 1 AGN are the dominant constituents (90%) of this soft X-ray-selected sample of AGN. This catalog sample includes several notable revisions relative to previous versions of the catalog (Mullis 2001, Ph. D. thesis, U. Hawaii; Gioia et al. 2003, ApJS, 149, 29, available in HEASARC Browse as the ROSNEPOID table). Firstly, the AGN fluxes and luminosities previously reported were overestimated by approximately 20% on average as a result of an error in the conversion of X-ray count rate to flux. Secondly, the sample has grown by 1 because of the reclassification of one of the X-ray sources (RX J1824.7+6509). Finally, in the present study the authors have adopted the presently favored "concordance" cosmology in computing the X-ray luminosities. The revised and updated catalog with corrected properties presented here should be the reference point for any future work with the ROSAT NEP AGN sample. This table was created by the HEASARC in August 2005 based on CDS table J/ApJ/617/192/table1.dat. This is a service provided by NASA HEASARC . 2004ApJ...617..192M https://heasarc.gsfc.nasa.gov/W3Browse/all/rosnepagn.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=rosnepagn& GET text/xml 180 99999 true 269.60166667 62.05555556 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=rosnepagn GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_rosnepagn&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ROSAT 0.0333333333333333 X-ray public rosnepagn ROSAT North Ecliptic Pole Survey Active Galactic Nuclei Catalog name Object Designation (RX JHHMMSS.S+DDMM) meta.id;meta.main char nullable nep_id Internal Catalog Identification Number meta.id short nullable ra Right Ascension of Associated Optical Object degree pos.eq.ra;meta.main double nullable dec Declination of Associated Optical Object degree pos.eq.dec;meta.main double nullable flux_corr Rest Frame Total 0.5-2keV Unabsorbed Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable lx Rest Frame K-Corrected 0.5-2keV Luminosity (erg/s) erg/s phys.luminosity;em.X-ray.soft double nullable redshift Spectroscopically Measured Redshift src.redshift double nullable lii Galactic Longitude of Associated Optical Object degree pos.galactic.lon double nullable agn_type Flag Indicates AGN Type, 1 or 2 src.class char nullable count_rate Count Rate in the 0.1-2.4keV Range ct/s phot.count;em.X-ray.soft double nullable nh_gal Column Density of Galactic Hydrogen (cm^-2) H-atoms/cm^2 phys.columnDensity double nullable bii Galactic Latitude of Associated Optical Object degree pos.galactic.lat double nullable dec_xray ROSAT Declination, J2000 Sexagesimal Format pos.eq.dec char nullable name_flag Flag Indicates Source Formerly Classified As Stellar X-Ray Source meta.code;src char nullable ra_xray ROSAT Right Ascension, J2000 Sexagesimal Format pos.eq.ra char nullable count_rate_error Error in Count Rate ct/s stat.error;phot.count;em.X-ray.soft 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