ASCA Elliptical Galaxies and Galaxy Clusters Catalog

ASCA Elliptical Galaxies and Galaxy Clusters Catalog ASCAEGCLUS ivo://nasa.heasarc/ascaegclus NASA/GSFC HEASARC Fukazawa et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source Utilizing ASCA archival data of about 300 objects - elliptical galaxies, groups, and clusters of galaxies - the authors performed systematic measurements of the X-ray properties of hot gas in their systems, and compiled them in this study. The steepness (power-law slope) of the luminosity-temperature (L-T) relation, LX ~ kTalpha, in the range of kT ~ 1.5 - 15 keV is alpha = 3.17 +/- 0.15, consistent with previous measurements. In the relation, the authors find two breaks at around intracluster medium (ICM) temperatures of 1 keV and 4 keV: alpha = 2.34 +/- 0.29 above 4 keV, 3.74 +/- 0.32 in the 1.5 to 5 keV range, and 4.03 +/- 1.07 below 1.5 keV. Two such breaks are also evident in the temperature and size relation. The steepness in the L-T relation at kT > 4 keV is consistent with the scale-relation derived from the CDM model, indicating that the gravitational effect is dominant in richer clusters, while poorer clusters suffer non-gravity effects. The steep L-T relation below 1 keV is mostly attributed to X-ray faint systems of elliptical galaxies and galaxy groups. The authors find that the ICM mass within the scaling radius R1500 (the radius within which the averaged mass density is 1500 times higher than the critical density) follows the relation of Mgas ~ T(2.33+/-0.07) from X-ray faint galaxies to rich clusters. Thus, the authors speculate that even such X-ray faint systems contain large-scale hot gas, which is too faint to detect. For this project, the authors utilized all of the ASCA data of elliptical galaxies and clusters of galaxies. Several clusters were observed more than once, and they chose the observation with the longest exposure. The total number of objects that the authors identified as elliptical galaxies and clusters was 313, and these are listed in this table. Some of the objects could not be utilized for deriving various correlations, due to either having an unknown redshift (17 objects), an insignificant detection (13 objects listed below), or contamination of the environmental X-ray emission, such as cluster emission around non-cD elliptical galaxies (10 objects: NGC 4472, NGC 4406, NGC 4374, NGC 1404, NGC 499, NGC 6034, NGC 2865, NGC 4291, CL 2236-04 and RX J1031.6-2607). Thus, the authors analyzed the ASCA data for 292 objects, among which were ~ 50 elliptical galaxies and galaxy groups. In this study, the authors assumed the Hubble constant to be 50 h50 km s-1 Mpc-1 and q0 to be 0. Table 1 of the reference paper (reproduced below) lists the 13 clusters for which only 90% confidence level upper limits to the flux in the observer's frame are available: <pre> Name Flux (0.5 - 2 keV) Upper Limit (erg/s/cm2) NGC 5018 9.8 x 1014 GHO 1322+3114 1.3 x 1013 J1888.16CL 5.9 x 1014 CL 0317+1521 4.5 x 1014 MS 1512.4+3647 1.0 x 1012 PRG 38 6.9 x 1014 SCGG 205 6.9 x 1014 RGH 101 9.1 x 1014 3C 184 8.5 x 1014 RX J1756.5+6512 1.6 x 1013 3C 324 5.4 x 1014 PDCS 01 2.8 x 1014 MS 0147.8-3941 5.0 x 1014 </pre> This table was created by the HEASARC in December 2011 based on CDA Catalog J/PASJ/56/965 files table3.dat, table4.dat, table5.dat, table6.dat and table7.dat. This is a service provided by NASA HEASARC . 2004PASJ...56..965F https://heasarc.gsfc.nasa.gov/W3Browse/all/ascaegclus.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=ascaegclus& GET text/xml 180 99999 true 304.637 -70.853 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=ascaegclus GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_ascaegclus&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GALAXY CATALOG 0.0833333333333333 X-ray public ascaegclus ASCA Elliptical Galaxies and Galaxy Clusters Catalog name Cluster Designation meta.id;meta.main char nullable sequence_number ASCA Observation Sequence Identifier meta.id;obs int nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable count_rate Count Rate in ct/s/1GIS ct/s phot.count;em.X-ray double nullable flux X-Ray Flux in the 0.5-10keV Observer Frame erg/s/cm^2 phot.flux;em.X-ray double nullable lx_tot Bolometric X-Ray Luminosity, in erg/s/h_50_^2 erg/s/h50^2 phys.luminosity;em.X-ray double nullable lx_tot_pos_err Positive Error for Bolometric X-Ray Luminosity (Upper Limit) erg/s/h50^2 phys.luminosity;em.X-ray double nullable lx_tot_neg_err Negative Error for Bolometric X-Ray Luminosity (Lower Limit) erg/s/h50^2 phys.luminosity;em.X-ray double nullable kt_limit Limit Flag for kT meta.code;phys.temperature;stat.fit.param char nullable kt Temperature Energy keV phys.temperature;stat.fit.param double nullable kt_error RMS Uncertainty for kT keV stat.error;phys.temperature;stat.fit.param 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 lii Galactic Longitude degree pos.galactic.lon double nullable detect_radius_mpc Detection Radius in Mpc/h_50_ Mpc/h50 phys.size.radius double nullable total_mass Total Mass, in solMass/h_50_ Solar_Mass/h50 phys.mass double nullable int_outer_radius Outer Radius of Integration Region of Spectra in Units of DETX/DETY Channel phys.size.radius;instr.det short nullable abundance_error RMS Uncertainty for Metal Abundance Sun stat.error;phys.abund;stat.fit.param double nullable flm_flag Flag [A] Indicates Redshift Value Assumed meta.code char nullable exposure Exposure Time s time.duration;obs.exposure int nullable db_core_radius Code Radius, in arcmin, in Double-Beta Model Fitting arcmin phys.angSize;stat.fit.param double nullable beta_1_neg_err Negative Error for Beta_1 Parameter (Lower Limit) stat.error;stat.fit.param double nullable bii Galactic Latitude degree pos.galactic.lat double nullable end_time Date/Time of End of Observation mjd time.end;obs double nullable abundance Metal Abundance Sun phys.abund;stat.fit.param double nullable core_radius_kpc Core Radius, in kpc/h_50_ kpc/h50 phys.size.radius;stat.fit.param double nullable redshift Redshift src.redshift double nullable detect_radius Detection Radius in arcmin arcmin phys.angSize double nullable lx_tot_inner_limit Limit Flag for Bolometric X-Ray Luminosity for Inner Components meta.code;phys.luminosity;em.X-ray char nullable central_sb Central Surface Brightness in the 0.5-10keV Observer Frame erg/s/cm^2/arcmin^2 phot.flux.sb double nullable db_gas_mass_pos_err Positive Error for Gas Mass (Upper Limit), in solMass/h_50_^2.5 Solar_Mass/h50^2.5 stat.error;phys.mass double nullable central_sb_pos_err Positive Error for Central Surface Brightness (Upper Limit) erg/s/cm^2/arcmin^2 stat.error;phot.flux.sb double nullable spectral_fit_flag Flag [1/2] Indicates Note on Spectrum Fitting meta.code;stat.fit short nullable lx_fraction Fraction of Luminosity in the 0.5-10keV Band phys.luminosity;em.X-ray double nullable nh Hydrogen Column Density cm^-2 phys.columnDensity double nullable lx_tot_inner Bolometric X-Ray Luminosity for Inner Components in Double-Beta Model Fitting erg/s/h50^2 phys.luminosity;em.X-ray double nullable abundance_limit Limit Flag for Metal Abundance meta.code;phys.abund;stat.fit.param char nullable db_outer_ne Electron Density for the Outer Component, in h_50_^0.5/cm^3 h50^0.5/cm^3 phys.density;stat.fit.param double nullable core_radius Core Radius arcmin phys.angSize;stat.fit.param double nullable db_alt_outer_ne Electron Density for Outer Component When Assumed Beta_1=0.6 h50^0.5/cm^3 phys.density;stat.fit.param double nullable db_alt_gas_mass Gas Mass When Assumed Beta_1=0.6 for the Outer Beta-Model Component Solar_Mass/h50^2.5 phys.mass double nullable db_alt_core_radius_kpc Core Radius When Assumed Beta_1=0.6 for the Outer Beta-Model Component kpc/h50 phys.size.radius;stat.fit.param double nullable db_beta_1 Beta_1 Parameter in Double-Beta Model Fitting stat.fit.param double nullable lx_tot_inner_pos_err Positive Error for X-Ray Luminosity for Inner Components (Upper Limit) erg/s/h50^2 stat.error;phys.luminosity;em.X-ray double nullable db_beta_1_neg_err Negative Error for Beta_1 (Lower Limit) stat.error;stat.fit.param double nullable lx_tot_inner_neg_err Negative Error for X-Ray Luminosity for Inner Components (Lower Limit) erg/s/h50^2 stat.error;phys.luminosity;em.X-ray double nullable db_inner_ne_pos_err Positive Error for Electron Density for the Inner Component (Upper Limit) h50^0.5/cm^3 stat.error;phys.density;stat.fit.param double nullable detect_radius_limit Limit Flag for Detection Radius meta.code;phys.angSize char nullable beta_1 Beta_1 Parameter stat.fit.param double nullable redshift_flag Flag [E] Indicates Redshift Is Estimated When Not Available meta.code;src.redshift char nullable db_outer_ne_pos_err Positive Error for Electron Density for the Outer Component (Upper Limit) h50^0.5/cm^3 stat.error;phys.density;stat.fit.param double nullable db_core_radius_kpc Core Radius, in kpc/h_50_, in Double-Beta Model Fitting kpc/h50 phys.size.radius;stat.fit.param double nullable core_radius_neg_err Negative Error for Core Radius (Lower Limit) arcmin stat.error;phys.angSize;stat.fit.param double nullable db_gas_mass Gas Mass within Detection Radius in solMass/h_50_^2.5 Solar_Mass/h50^2.5 phys.mass double nullable center_detx X Center Coordinates in Units of DETX/DETY Channel pos.cartesian.x;instr.det short nullable gas_mass_pos_err Positive Error for Gas Mass (Upper Limit) in solMass/h_50_^2.5 Solar_Mass stat.error;phys.mass double nullable thermal_fraction Flux Fraction of Thermal Component in the Spectral Fitting stat.fit;arith.ratio double nullable lx_tot_outer_neg_err Negative Error for X-Ray Luminosity for Outer Components (Lower Limit) erg/s/h50^2 stat.error;phys.luminosity;em.X-ray double nullable db_beta_1_pos_err Positive Error for Beta_1 (Upper Limit) stat.error;stat.fit.param double nullable core_radius_pos_err Positive Error for Core Radius (Upper Limit) arcmin stat.error;phys.angSize;stat.fit.param double nullable db_inner_ne_neg_err Negative Error for Electron Density for the Inner Component (Lower Limit) h50^0.5/cm^3 stat.error;phys.density;stat.fit.param double nullable db_gas_mass_neg_err Negative Error for Gas Mass (Lower Limit), in solMass/h_50_^2.5 Solar_Mass/h50^2.5 stat.error;phys.mass double nullable ne Electron Density in h_50_^0.5/cm^3 h50^0.5/cm^3 phys.density;stat.fit.param double nullable center_dety Y Center Coordinates in Units of DETX/DETY Channel pos.cartesian.y;instr.det short nullable db_core_radius_pos_err Positive Error for Core Radius (Upper Limit) arcmin stat.error;phys.angSize;stat.fit.param double nullable db_core_radius_neg_err Negative Error for Core Radius (Lower Limit) arcmin stat.error;phys.angSize;stat.fit.param double nullable ne_pos_err Positive Error for Electron Density (Upper Limit) h50^0.5/cm^3 stat.error;phys.density;stat.fit.param double nullable lx_tot_outer_pos_err Positive Error for X-Ray Luminosity for Outer Components (Upper Limit) erg/s/h50^2 stat.error;phys.luminosity;em.X-ray double nullable db_inner_ne Electron Density for the Inner Component, in h_50_^0.5/cm^3 h50^0.5/cm^3 phys.density;stat.fit.param double nullable central_sb_neg_err Negative Error for Central Surface Brightness (Lower Limit) erg/s/cm^2/arcmin^2 stat.error;phot.flux.sb double nullable gas_mass_neg_err Negative Error for Gas Mass (Lower Limit) in solMass/h_50_^2.5 Solar_Mass stat.error;phys.mass double nullable "time" Date/Time of Start of Observation mjd time.start;obs double nullable db_outer_ne_neg_err Negative Error for Electron Density for the Outer Component (Lower Limit) h50^0.5/cm^3 stat.error;phys.density;stat.fit.param double nullable gas_mass Gas Mass, in solMass/h_50_^2.5 Solar_Mass/h50^2.5 phys.mass double nullable ne_neg_err Negative Error for Electron Density (Lower Limit) h50^0.5/cm^3 stat.error;phys.density;stat.fit.param double nullable beta_1_pos_err Positive Error for Beta_1 Parameter (Upper Limit) stat.error;stat.fit.param double nullable lx_tot_outer Bolometric X-Ray Luminosity for Outer Components in Double-Beta Model Fitting erg/s/h50^2 phys.luminosity;em.X-ray double nullable radial_flag Flag [A] Indicates Redshift Value Assumed meta.code;stat.fit char nullable int_inner_radius Inner Radius of Integration Region of Spectra in Units of DETX/DETY Channel phys.size.radius;instr.det short nullable