XBOOTES: Chandra X-Ray Point Source Catalog for the Bootes Field

3293 X-ray point sources detected in the 9 square degree Bootes field using 126 Chandra ACIS-I observations, each approximately 5000 seconds long. The catalog, created by NASA HEASARC in February 2006, provides source positions, fluxes, and hardness ratios for sources with at least 4 counts in the 0.5-7 keV band. This survey was designed to search for large-scale structure and calculate source statistics with arcsecond resolution and uniform coverage.

Use Cases

• Identify and classify X-ray-selected sources based on optical spectroscopic follow-up and the NDWFS dataset mentioned in the description.
• Calculate X-ray source statistics over a wide, contiguous field of view as described.
• Search for large-scale structure using the arcsecond angular resolution and uniform coverage of the survey.
• Analyze the relationship between X-ray flux and hardness ratios for the 3293 cataloged point sources.

Strengths

• Contains 3293 point sources with a high reliability threshold of ~99%.
• Covers a wide, contiguous 9 square degree field with uniform coverage and arcsecond resolution.
• Based on 126 separate Chandra ACIS-I observations, each of approximately 5000 seconds duration.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The catalog excludes 43 detected extended sources, which are noted as not included.

Provenance

Source

NASA HEASARC, based on data from the electronic ApJ website.

Collection Method

Wavelet decomposition of Chandra X-ray observations from the NOAO Deep Wide-Field Survey (NDWFS).

Time Range

Observational period not specified; catalog created in February 2006.

Freshness

Last updated 2026-03-13 19:38:40.398232; freshness should be verified.

Geography

Bootes field of the NOAO Deep Wide-Field Survey (NDWFS).