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Zwicky Clusters
The ZWCLUSTERS database is based upon the Catalogue of Zwicky Clusters of Galaxies. The Zwicky clusters were identified by F. Zwicky in 560 POSS fields. They are rich clusters,... -
X-Ray Selected High-z AGN Catalog
This table contains the results from an analysis of the largest high-redshift (z > 3) X-ray-selected active galactic nucleus (AGN) sample to date, combining the Chandra... -
X-Ray Selected BL Lac Objects Catalog
This table contains a catalog of 312 X-ray selected BL Lacertae objects (XBLs), optically identified through the end of 2011. It contains the names from different surveys,... -
2XMMi/SDSS Galaxy Cluster Survey Extension
This table contains results from the analysis of a sample of 383 X-ray selected galaxy groups and clusters with spectroscopic redshift measurements (up to z ~ 0.79) from the... -
Swift Simultaneous UV, Optical, and X-Ray Observed Quasar Catalog
The authors have compiled a catalog of optically selected quasars with simultaneous observations in UV/optical and X-ray bands by the Swift Gamma-ray Burst Explorer. Objects in... -
Swift BAT 60-Month Survey of Active Galactic Nuclei Catalog
Surveys above 10 keV represent one of the best resources to provide an unbiased census of the population of active galactic nuclei (AGNs). The authors present the results of 60... -
6dFGS Galaxy Survey Final Redshift Release Catalog
The final redshift release of the 6dF Galaxy Survey (6dFGS) is a combined redshift and peculiar velocity survey over the southern sky (|b| > 10 degrees). Its 136,304 spectra... -
Shakhabazian (Shk) Compact Groups of Galaxies: Individual Galaxies Data
The largest survey of compact galaxy groups was published by Shakhbazian et al. (the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VII/89">CDS catalog VII/89</a>,... -
Shakbazian Compact Groups of Galaxies
This catalog is a compilation of ten lists of compact groups of compact galaxies found on the Palomar Sky Survey red charts and published in the period 1973 to 1979 by... -
Sloan Digital Sky Survey (DR5)/XMM-Newton Quasar Survey Catalog
This table contains the 5th Data Release Sloan Digital Sky Survey (DR5 SDSS)/XMM-Newton Quasar Survey Catalog. This catalog contains 792 SDSS DR5 quasars with optical spectra... -
Sloan Digital Sky Survey DR6 Galaxy Clusters Catalog
Clusters of galaxies in most of the previous catalogs have redshifts z <= 0.3. Using the photometric redshifts of galaxies from the Sloan Digital Sky Survey Data Release 6... -
Sloan Digital Sky Survey Quasar Catalog (Twelfth Data Release: DR12Q)
This table contains the Data Release 12 Quasar Catalog (DR12Q) from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III (SDSS-III). This... -
Sloan Digital Sky Survey NBC Quasar Candidate Catalog
The Nonparametric Bayes Classifier (NBC) Quasar Candidate Catalog is a catalog of 100,563 unresolved, UV-excess (UVX) quasar candidates with magnitudes to as faint as 21 in the... -
Sloan Digital Sky Survey Quasars Detected by Chandra
The authors have studied the spectral energy distributions and evolution of a large sample of optically selected quasars from the Sloan Digital Sky Survey (SDSS) that were... -
Sloan Digital Sky Survey Broad Absorption Line Quasars Catalog: 5th Data Release
No Description Available -
ROSAT North Ecliptic Pole Survey Active Galactic Nuclei Catalog
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... -
ROSAT PSPC Catalog of Clusters of Galaxies
This is a catalog of 203 clusters of galaxies serendipitously detected in 647 ROSAT PSPC high Galactic latitude pointings covering 158 square degrees. This is one of the largest... -
ROSAT Radio-Quiet Quasars Catalog
A sample of all radio-quiet quasars or quasars without radio detection taken from the Veron-Cetty - Veron catalog (1993, VERON93, ADC/<a... -
ROSAT Radio-Loud Quasars Catalog
Brinkmann et al. (1997) have compiled a sample of all quasars with measured radio emission from the Veron-Cetty - Veron catalog (1993, VERON93, CDS/ADC Cat. VII/166) detected by... -
ROSAT-ESO Flux-Limited X-Ray (REFLEX) Galaxy Cluster Survey
This table is the ROSAT-ESO Flux-Limited X-Ray (REFLEX) Galaxy Cluster Survey Catalog. The REFLEX Cluster Survey provides information on the X-ray properties, redshifts, and...
