SSA22 Field: Chandra X-Ray Point Source Catalog for a z=3.09 Protocluster

297 X-ray point sources detected in a deep ~400-ks Chandra ACIS-I exposure of the SSA22 field, centred on a z=3.09 protocluster. The catalog, created by NASA HEASARC in February 2010, includes optical spectroscopic redshifts and near/mid-infrared photometry for the sources. It represents the fourth deepest extragalactic Chandra survey and the only one focused on a known high-redshift structure.

Use Cases

• Analyze the correlation between AGN fraction and local Lyman-alpha emitter (LAE) source density based on the statistical evidence mentioned in the description.
• Study the properties of absorbed active galactic nuclei (AGN) based on the X-ray and infrared data provided.
• Identify and characterize the 12 X-ray sources likely associated with the SSA22 protocluster based on their redshift range and multiwavelength properties.
• Compare X-ray luminosity ranges (~10^43 - 10^45 erg s^-1) of protocluster AGN with other high-redshift samples.
• Utilize the deep sensitivity limits (~5.7 x 10^-17 erg cm^-2 s^-1 in 0.5-2 keV) for benchmarking against other extragalactic X-ray surveys.

Strengths

• Contains 297 X-ray point sources detected over a ~330 arcmin^2 region.
• Provides multiwavelength data including optical spectroscopic redshifts and near/mid-infrared photometry.
• Achieved deep sensitivity limits, making it the fourth deepest extragalactic Chandra survey.
• Specifically focused on a known high-redshift (z=3.09) protocluster, a unique characteristic.

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 18:11:53.020186; freshness should be verified.

Provenance

Source

NASA HEASARC, based on Table 2 from a reference paper in Monthly Notices.

Collection Method

Observations from a deep ~400-ks Chandra ACIS-I exposure.

Time Range

Observations centred on a z=3.09 protocluster; catalog created in February 2010.

Freshness

Last updated 2026-03-13 18:11:53.020186

Geography

SSA22 field (astronomical coordinates).