CLASXS: Chandra X-Ray Survey Optical and Infrared Catalog

A redshift catalog for X-ray sources detected in the Chandra Large Area Synoptic X-ray Survey (CLASXS), extended with photometric redshifts. The table also contains updated optical and infrared photometric catalogs for the X-ray sources in the CLASXS field. This table was created by the NASA HEASARC in January 2009 based on data from the referenced paper.

Use Cases

• Analyzing the effect of spectral type on X-ray luminosity function evolution based on the survey's spectroscopic completeness.
• Comparing optical spectral types with X-ray spectral properties using the combined redshift and photometric data.
• Studying the population of X-ray sources in the flux range of the observed break in the log N - log S distribution.
• Cross-referencing X-ray source data with optical and infrared photometry for multi-wavelength analysis.

Strengths

• Integrates spectroscopic redshifts from previous work with newly extended photometric redshift information.
• Combines X-ray source data with optical and infrared photometric catalogs for the same field.
• Part of the OPTX Project, which uses surveys noted for being among the most spectroscopically complete to date.

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 19:26:25.976873; freshness should be verified.

Provenance

Source

NASA HEASARC, based on electronic data from the referenced paper (Trouille et al. 2008).

Collection Method

Created from the electronic version of Table 12 from the paper obtained from the ApJ website.

Geography

Covers the CLASXS astronomical survey field.