ECDFS: 651 X-Ray Point Sources from Chandra Deep Field-South Survey

651 unique X-ray sources detected in the Extended Chandra Deep Field-South survey, the largest Chandra survey at its depth of approximately 228 ks. The catalog, created by NASA HEASARC in April 2009, combines primary and secondary source lists from the original reference paper. It covers ~0.3 deg² and provides limiting flux values in soft and hard X-ray bands.

Use Cases

• Modeling AGN population synthesis based on differential and cumulative flux distributions.
• Analyzing the relationship between source faintness and spectral hardness to test the obscured AGN hypothesis.
• Comparing source detection methodologies using the conservative and lower thresholds (source_type 'P' and 'S').
• Benchmarking deep X-ray survey results against other catalogs like the 809-source analysis by Lehmer et al. (2005).

Strengths

• Contains 651 unique X-ray sources with band-specific detection counts (561 in full, 529 in soft, 335 in hard band).
• Provides specific limiting flux values: ~1.7e-16 ergs/cm²/s (0.5-2.0 keV) and ~3.9e-16 ergs/cm²/s (2.0-8.0 keV).
• Survey covers ~0.3 deg² to a depth of ~228 ks, described as the largest Chandra survey at such depth.
• Originates from a peer-reviewed analysis and is served by the authoritative NASA HEASARC.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect observational bias inherent to the specific Chandra pointings and guest observer program.

Provenance

Source

NASA HEASARC, based on electronic tables from the paper published in The Astronomical Journal.

Collection Method

Combined from two separate catalogs (Tables 4 and 5) presenting primary and secondary sources detected via Chandra ACIS-I observations.

Time Range

Observations conducted in Chandra Cycle 5 (specific years not provided).

Freshness

Last updated 2026-03-13 17:59:25.953170; freshness should be verified.

Geography

Centered on the original Chandra Deep Field-South (CDF-S) field; celestial coordinates not specified.