Lockman Hole X-Ray Point Source Catalog: 409 Sources from XMM-Newton

The Lockman Hole, a sky area of low Galactic line-of-sight column density, was observed by the XMM-Newton X-ray observatory between April 2000 and December 2002. The catalog lists positions, count rates, fluxes, hardness ratios, and partial optical classifications for 409 X-ray point sources detected in the central 0.196 square degrees. This table was created by NASA's HEASARC in May 2008 based on the CDS Catalog J/A+A/479/283.

Use Cases

• Analyze source distribution and density based on positions and detection likelihood threshold.
• Study spectral properties of X-ray sources based on hardness ratios and fluxes.
• Cross-match X-ray sources with optical counterparts based on partial optical classifications.
• Validate source detection methods based on the reported 4 potentially spurious sources from Monte Carlo simulations.

Strengths

• Contains 409 X-ray point sources with multiple measured properties.
• Based on a total exposure time of 1.16 Ms (EPIC pn) and 1.30 Ms (EPIC MOS).
• Focuses on the Lockman Hole, a scientifically important area of low Galactic foreground absorption.
• Analysis performed using the standard XMM-Newton SAS data analysis package.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data was last updated in 2026; freshness should be verified for current research needs.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC)

Collection Method

Observations from the XMM-Newton X-ray observatory in 18 pointings, processed with the XMM-Newton SAS data analysis package version 6.0.

Time Range

Observations performed between April 2000 and December 2002.

Freshness

Last updated 2026-03-13 18:55:48.456449

Geography

The Lockman Hole region of the sky.