Markarian Galaxies Optical Database with 1544 UV-Excess Objects

A database for the 1544 individual objects in the Markarian Catalog, combining new optical measurements from STScI Digitized Sky Survey plates with literature data. The NASA HEASARC created this table in November 2009 based on an electronic version obtained from the CDS. It includes accurate coordinates, magnitudes, diameters, redshifts for 1524 objects, and extensive notes on galaxy systems and classifications.

Use Cases

• Classify galaxy morphological types based on provided parameters like axial ratios and position angles.
• Analyze relationships between optical magnitudes (red and blue) and infrared magnitudes from 2MASS/DENIS.
• Study galaxy interactions and membership in systems based on the extensive notes clarifying misidentifications.
• Model galaxy activity classes using combined spectral, redshift, and optical diameter data.

Strengths

• Contains 1544 individual Markarian objects, with redshifts available for 1524 of them.
• Includes extensive notes summarizing galaxy system membership and revised activity classes.
• Provides multiple measurement types per object, including coordinates, magnitudes, diameters, and axial ratios.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 19:12:33.378092; freshness should be verified as the underlying data is from 2009.

Provenance

Source

NASA HEASARC, based on electronic version from CDS (catalog J/ApJS/170/33).

Collection Method

Combines new measurements from STScI Digitized Sky Survey (DSS) images with literature and database search.

Time Range

Based on the First Byurakan Spectral Sky Survey (FBS) and DSS plates; specific observation years not stated.

Freshness

Last updated 2026-03-13 19:12:33.378092; the core data compilation is from 2009.

Geography

Celestial coverage from the Palomar and UK Schmidt telescope surveys.