Chandra Deep Field-South: 7-Megasecond X-Ray Source Catalog with 1,008 Objects

A catalog of 1,008 X-ray sources detected in the Chandra Deep Field-South from a ~7 Ms exposure covering 484.2 square arcminutes. The National Aeronautics and Space Administration provides this data, which includes multiwavelength counterparts for 992 sources and identifies 711 active galactic nuclei. The catalog was last updated on March 13, 2026.

Use Cases

• Studying the population of active galactic nuclei based on the identification of 711 AGNs from the main catalog.
• Analyzing X-ray source number counts and sensitivity limits based on the provided flux limits in three energy bands.
• Investigating the relationship between X-ray sources and their optical/near-infrared counterparts based on the 98.4% multiwavelength identification rate.
• Comparing source detections with previous surveys based on the 291 new detections mentioned relative to the ~4 Ms catalog.

Strengths

• Contains 1,008 main-catalog X-ray sources with a high multiwavelength-identification rate of ~97%.
• Provides unprecedented sensitivity with specific flux limits (e.g., ~6.4 x 10^-18 erg cm^-2 s^-1 in the 0.5-2.0 keV band).
• Includes redshift information for 986 sources, comprising 653 spectroscopic and 333 photometric redshifts.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count for the supplementary catalog is known (47 sources), but the total row count for the combined data is unspecified.
• The source detection method using a P_B < 0.007 threshold is noted to have inevitably rejected some real X-ray sources.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Data gathered from the ~7 Ms exposure of the Chandra Deep Field-South, using WAVDETECT for source detection and ACIS Extract for photometric extraction.

Freshness

Last updated 2026-03-13 16:51:29.668223; freshness should be verified.

Geography

Covers the Chandra Deep Field-South region, an area of 484.2 square arcminutes.