Second Byurakan Survey: Optical Database for 1676 Galaxies

The Second Byurakan Survey (SBS) optical database contains 1676 galaxies observed to a limiting photographic magnitude of 19.5. NASA HEASARC created this table in May 2012 based on measurements from Palomar Schmidt telescope plates and the STScI Digital Sky Survey. It provides optical parameters, redshifts for 1576 objects, and 2MASS infrared magnitudes for 1117 galaxies.

Use Cases

• Classify galaxy morphology and activity based on provided morphological type and spectral classes.
• Analyze galaxy photometric properties using apparent magnitudes and diameters in blue, red, and near-infrared bands.
• Study galaxy environments based on neighbor counts within 50 kpc radii.
• Correlate optical and infrared properties using the included 2MASS magnitudes.

Strengths

• Contains 1676 individual galaxy objects with accurate coordinates and multiple optical measurements.
• Includes redshifts for 1576 objects and 2MASS infrared magnitudes for 1117 galaxies.
• Measurements derived from standardized photographic plates from the Palomar Schmidt telescope and STScI DSS.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect observational bias inherent to the specific survey plates and techniques.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/VII/264.

Collection Method

New measurements from photographic sky survey plates and additional information compiled from literature and other databases.

Time Range

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Freshness

Last updated 2026-03-13 17:37:02.631532; freshness should be verified.

Geography

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