Chandra Deep Field North: 503 X-ray Sources from 2-Megasecond Exposure

Five hundred and three X-ray sources were detected in the deepest X-ray observation of the universe in the 0.5-8.0 keV band, covering an area of ~448 square arcminutes. The catalog was created by NASA's HEASARC in April 2004 based on data from the Chandra X-ray Observatory. It provides source positions, X-ray colors, and sensitivity limits, with the dominant source type being absorbed AGN.

Use Cases

• Classifying X-ray source types based on the X-ray colors mentioned in the description.
• Studying the spatial distribution of AGN based on the 503 detected point sources.
• Analyzing source density in deep fields using the central region's 13600 (+3800,-3000) sources/deg² measurement.
• Assessing observational sensitivity limits for faint X-ray source detection.

Strengths

• Contains 503 X-ray sources detected in the deepest X-ray observation in its energy band.
• Provides high positional accuracy with a median positional uncertainty of ~0.3 arcseconds.
• Lists specific on-axis sensitivity limits (e.g., ~2.5x10^-17 ergs/cm²/s in the 0.5-2.0 keV band).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 16:37:30.622907; freshness should be verified.

Provenance

Source

NASA HEASARC, based on CDS catalog table J/AJ/126/539/cdfn.dat.

Collection Method

Point sources detected from a ~2 Megasecond Chandra X-ray Observatory exposure using matched-filter and centroiding techniques.

Freshness

Last updated 2026-03-13 16:37:30.622907

Geography

Covers the Chandra Deep Field North region, an area of ~448 square arcminutes.