Chandra Nearby Galaxies Point Source Catalog: 1,441 X-ray Sources

A catalog of 1,441 X-ray point sources detected in 32 nearby spiral and elliptical galaxies by the Chandra ACIS observatory. The table lists source properties such as counts in energy bands, hardness ratios, and inferred X-ray luminosities. This table was created by the NASA HEASARC in October 2006 based on data from the CDS.

Use Cases

• Correlating total point-source X-ray luminosity with B-band and K-band luminosities of host galaxies based on the described relationships.
• Investigating the connection between X-ray luminosity and star formation rates using FIR+UV luminosity proxies mentioned in the description.
• Analyzing the properties of individual X-ray point sources, such as hardness ratios and counts in energy bands, as described in the catalog.

Strengths

• Catalog contains 1,441 distinct X-ray point sources.
• Analysis is based on observations of 32 nearby galaxies.
• Data originates from the authoritative NASA HEASARC and Chandra observatory.

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 17:31:20.642962; freshness should be verified.

Provenance

Source

NASA HEASARC, based on CDS table J/ApJ/602/231/tablea1.dat.

Collection Method

Analysis of Chandra ACIS observations.

Time Range

Observations likely span the operational period of the Chandra observatory prior to 2006.

Freshness

Last updated 2026-03-13 17:31:20.642962.

Geography

Observations of 32 nearby spiral and elliptical galaxies.