Hewitt & Burbidge (1993) QSO Catalog: 7,315 Objects with Redshifts

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.