Catalog of 1055 X-Ray Sources in 29 Star-Forming Galaxies

1055 compact X-ray sources detected within 29 nearby star-forming galaxies, compiled from Chandra, Spitzer, GALEX, and 2MASS archives. The catalog was created by NASA's HEASARC in March 2012 to study high-mass X-ray binaries and their scaling with star formation rate. It was used to construct an average X-ray luminosity function with improved statistical accuracy over previous studies.

Use Cases

• Modeling the relationship between X-ray binary luminosity and star formation rate based on the derived scaling relation L_X ~ 2.6 x 10^39 x SFR.
• Analyzing the power-law slope and potential break in the X-ray luminosity function for high-mass X-ray binaries in the log(L_X) ~ 35 - 40 range.
• Estimating the fraction of compact objects experiencing an X-ray active phase with a high-mass companion, based on the parameter f_X ~ 0.2 x (0.1 Myr/tau_x).
• Distinguishing between high-mass X-ray binaries and background AGNs within the source catalog, as the authors estimate ~300 sources are likely background objects.

Strengths

• Catalog contains 1055 compact X-ray sources, providing a substantial sample for statistical analysis.
• Data is derived from a homogeneous set of observations from four major space archives (Chandra, Spitzer, GALEX, 2MASS).
• Study sample includes 29 nearby star-forming galaxies, allowing for comparative analysis.
• The derived X-ray luminosity function has improved statistical accuracy and better control of systematic effects than prior studies.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The authors note a dispersion of rms ~ 0.4 dex in the scaling relations, which they attribute to physical origin.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/MNRAS/419/2095.

Collection Method

Compiled from X-ray, infrared, and ultraviolet observations from Chandra, Spitzer, GALEX, and 2MASS archives.

Time Range

Observational timeframe is not specified in the provided metadata.

Freshness

Last updated 2026-03-13 18:10:39.188279; freshness should be verified.

Geography

Sources are located within the D25 ellipses of 29 nearby star-forming galaxies; specific galaxies are not named.