E-CDF-S: 250-ks Chandra X-ray Point Source Catalog with Multi-wavelength IDs

1059 X-ray sources, including 318 newly detected ones, form this improved point-source catalog for the Extended Chandra Deep Field-South. The catalog was created by NASA HEASARC in 2016, implementing recent Chandra source-cataloguing improvements. It provides multi-wavelength identifications, counterpart magnitudes, redshifts, and source classifications for these generally fainter and more obscured objects.

Use Cases

• Identify and classify X-ray point sources based on detection probability and counterpart criteria.
• Study active galactic nucleus and galaxy source densities using the provided estimates.
• Cross-match X-ray sources with multi-wavelength counterparts using provided IDs and magnitudes.
• Analyze the properties of fainter and more obscured sources from the 318 new detections.

Strengths

• Catalog contains 1003 main sources detected with high reliability and 56 supplementary sources.
• Simulations show the main catalog is highly reliable and reasonably complete.
• On-axis mean flux limits represent a ~1.5-2.0 improvement over the previous E-CDF-S limit.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/ApJS/224/15.

Collection Method

Created from Chandra X-ray observations of the Extended Chandra Deep Field-South, utilizing centroid and matched-filter techniques for source positions.

Time Range

Observations taken between 2004 February 29 and November 20.

Freshness

Last updated 2026-03-13 17:03:08.903827; freshness should be verified.

Geography

Covers the Extended Chandra Deep Field-South region, which flanks the Chandra Deep Field-South proper.