ACCEPT: Chandra X-ray Entropy Profiles for 239 Galaxy Clusters

NASA HEASARC provides radial entropy profiles for the intracluster medium of 239 galaxy clusters, derived from the Chandra X-ray Observatory's public archive as of August 2008. The catalog includes fitted model parameters for entropy profiles and analysis of bimodality in core entropy values. This table was created by the HEASARC in January 2012 based on data from the CDS catalog J/ApJS/182/12.

Use Cases

• Modeling the thermal history of galaxy clusters based on radial entropy profiles.
• Investigating bimodality in core entropy (K0) distributions across cluster samples.
• Assessing the impact of observational effects like point-spread function smearing on entropy measurements.
• Validating entropy profile models (K(r) = K0 + K100 (r/100 kpc)^α) against X-ray observations.

Strengths

• Contains data for 239 galaxy clusters, a substantial sample for statistical analysis.
• Profiles are derived from the Chandra X-ray Observatory, a premier space telescope.
• Includes analysis of a distinct bimodal distribution in core entropy (K0) with peaks at ~15 and ~150 keV cm².
• Publicly available with associated data and results on a dedicated project website.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is based on observations publicly available as of August 2008; newer observations are not included.

Provenance

Source

National Aeronautics and Space Administration (NASA) HEASARC, based on CDS Catalog J/ApJS/182/12.

Collection Method

Derived from observations taken with the Chandra X-ray Observatory and publicly available in the Chandra Data Archive.

Time Range

Observations publicly available as of August 2008.

Freshness

Last updated 2026-03-13 19:38:13.726280; freshness should be verified.