Hewitt & Burbidge (1993) QSO Catalog: 7,315 Objects with Redshifts
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Description
The Hewitt & Burbidge (1993) Revised and Updated Catalog of Quasi-Stellar Objects contains 7,315 objects, including 89 BL Lac objects, known as of December 31, 1992. NASA HEASARC created this database in February 2001 based on the CDS/ADC Catalog VII/158. It provides information on names, positions, magnitudes, colors, and emission-line redshifts for these astronomical objects.
Use Cases
Analyze redshift distributions of quasi-stellar objects based on the emission-line redshift data.
Study the positional and photometric properties of quasars based on the positions and magnitudes information.
Identify and compare characteristics of BL Lac objects within the catalog.
Cross-reference historical quasar data with modern surveys based on the catalog's object names and coordinates.
Strengths
Contains 7,315 objects, providing a substantial historical snapshot of known QSOs.
Includes 89 specifically identified BL Lac objects for focused study.
Compiled from a published, peer-reviewed catalog (Hewitt & Burbidge 1993, ApJS, 87, 451).
Created and served by NASA HEASARC, an authoritative space science data archive.
Limitations
Data is a condensed version, containing only the first row of information per object from the original multi-row catalog.
Row count is unknown, which may limit suitability assessment.
Data reflects knowledge as of 1992; newer discoveries are not included.
Provenance
Source
NASA HEASARC, based on CDS/ADC Catalog VII/158.
Collection Method
Condensed from the published Hewitt & Burbidge (1993) catalog.
Time Range
Objects known up to December 31, 1992.
Freshness
Last updated 2026-03-13 17:45:38.248782; freshness should be verified.
Geography
Astronomical objects across the sky; spatial coverage is celestial.
License is listed as 'other-license-specified'; terms should be reviewed before use.