AEGIS-XD: Chandra X-Ray Point Source Catalog for the Extended Groth Strip

937 X-ray point sources detected in deep Chandra observations of the Extended Groth Strip between 2007 and 2009. The catalog, created by NASA HEASARC in 2016, includes multiwavelength identifications for 94% of sources and provides spectroscopic or photometric redshifts for all, with photometric redshifts achieving a mean accuracy of sigma = 0.04. This survey is the third deepest X-ray survey, covering an area of approximately 0.29 square degrees.

Use Cases

• Studying the population and properties of active galactic nuclei based on the catalog's high identification completeness.
• Training redshift estimation models using the provided photometric and spectroscopic redshift data.
• Cross-matching X-ray sources with optical and infrared counterparts from datasets like CANDELS, Spitzer, and Hubble.
• Analyzing the cosmic evolution of X-ray sources in a deep, wide-field survey area.

Strengths

• Catalog contains 937 point sources with a high identification completeness of approximately 94%.
• Photometric redshifts have a mean accuracy of sigma = 0.04 and an outlier fraction of about 5%.
• Survey depth of 800ks exposure makes it the third deepest X-ray survey, covering an area ~3 times greater than the Chandra Deep Fields.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Spectroscopic redshifts are available for only 38% (353) of the X-ray sources.

Provenance

Source

National Aeronautics and Space Administration, NASA HEASARC

Collection Method

Based on deep Chandra imaging with the ACIS-I instrument, combined with identifications from ground-based, Spitzer, GALEX, and Hubble Space Telescope imaging.

Time Range

Observations taken from 2007 December 11 to 2009 June 26.

Freshness

Last updated 2026-03-13 20:12:57.326832; freshness should be verified.

Geography

Central region of the Extended Groth Strip, specifically the AEGIS-1, AEGIS-2, and AEGIS-3 fields.