ROSAT/WARPS ivo://nasa.heasarc/warps NASA/GSFC HEASARC Perlman et al. 2026-04-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Cluster of Galaxies Survey Source The Wide Angle ROSAT Pointed Survey, First Phase (WARPS-I) table is a catalog which contains optical identifications for objects found in a serendipitous survey of relatively deep, pointed ROSAT observations for clusters of galaxies. The X-ray source detection algorithm used by WARPS is Voronoi Tessellation and Percolation (VTP), a technique which is equally sensitive to point sources and to extended sources of low surface brightness. WARPS-I is based on the central regions of 86 ROSAT PSPC fields, covering an area of 16.2 square degrees. The X-ray source screening and optical identification process for WARPS-I yielded 34 clusters at 0.06<z<0.75. Twenty-two of these clusters form a complete, statistically well-defined sample drawn from 75 of these 86 fields, covering an area of 14.1 square degrees, with a flux limit of F(0.5-2.0keV) = 6.5x10<sup>-14</sup> erg/cm<sup>2</sup>/s. This sample can be used to study the properties and evolution of the gas, galaxy and dark matter content of clusters and to constrain cosmological parameters. This online catalog was created by the HEASARC in May 2003 based on machine-readable versions of tables 2, 3, 4 and 5 of Perlman et al. (2002) that were obtained from the CDS. This is a service provided by NASA HEASARC . 2002ApJS..140..265P https://heasarc.gsfc.nasa.gov/W3Browse/all/warps.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=warps& GET text/xml 180 99999 true 25.13041667 -68.08583333 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=warps GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_warps&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ROSAT 0.0833333333333333 X-ray public warps Wide Angle ROSAT Pointed Survey, First Phase (WARPS-I) name Catalog 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 flux Unabsorbed 0.5-2.0keV X-Ray Flux (erg/cm^2/s) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable redshift Redshift src.redshift double nullable source_type Source Type Identification src.class char 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 redshift_flag Flag Indicates Redshift Uncertainty or Estimated Photometrically char nullable extent_parameter Extent Parameter double nullable notes Other Names and/or Additional Notes char nullable nh_galactic Galactic Hydrogen Column Density from Dickey & Lockman (H-atoms/cm^2) H-atoms/cm^2 double nullable num_redshifts Number of Galaxy Redshifts Used to Derive Redshift short nullable imaging_passband Source Imaging Passband char nullable rosat_field ROSAT Pointing Field Containing the Source char nullable table_id Table Number: 2=WARPS-I Source, 3=Other Source, 5=Additional Clusters/Candidates short nullable lii Galactic Longitude degree pos.galactic.lon double nullable log_lx Logarithm of the Rest-Frame 0.5-2.0 keV Luminosity in Units of erg/s log(erg/s) double nullable core_radius Cluster Core Radius (arcsec) arcsec double nullable count_rate Corrected (i.e., Total) VTP Count Rate (counts/sec) ct/s phot.count;em.X-ray.soft double nullable spect_type Spectral Type (for Stars) src.spType char nullable class Browse Object Classification src.class short nullable flux_limited_sample Flag Indicates Statistically Complete, Flux-Limited Sample char nullable flags Additional Flags char nullable raw_count_rate Raw VTP Count Rate (counts/sec) ct/s double nullable spectra_flag Flag Indicates Spectra Were Taken for Source char nullable bii Galactic Latitude degree pos.galactic.lat double nullable