XMM-Newton X-Ray Point Source Catalog for Lynds 1641 and iota Ori Region

NASA's HEASARC table contains results from the Survey of Orion A with XMM-Newton and Spitzer (SOXS). The catalog includes 1060 X-ray sources detected in the Orion A cloud south of the Orion Nebula, with spectral parameters for 232 bright sources and 1041 infrared counterparts. The data was last updated in March 2026.

Use Cases

• Identify and classify young stellar objects (Class I, II, III) based on X-ray and infrared counterpart data.
• Analyze spatial clustering of evolved Class III stars within the Lynds 1641 dark cloud.
• Study X-ray spectral properties of 232 bright sources using the provided best-fit parameters.
• Distinguish between cloud members and background sources like active galactic nuclei based on multi-wavelength matching.

Strengths

• Contains 1060 X-ray sources detected with more than 4.5-sigma significance.
• Includes spectral parameters for 232 of the brightest X-ray sources.
• Provides 1041 infrared counterparts, with 94% of sources having 2MASS and Spitzer matches.
• Combines proprietary and archival XMM-Newton data across multiple fields for broader coverage.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• 16 X-ray sources have no identified counterparts as they lie outside the Spitzer field of view.

Provenance

Source

National Aeronautics and Space Administration (NASA), HEASARC.

Collection Method

Combined analysis of proprietary and archival XMM-Newton observations, plus Spitzer infrared data.

Time Range

null

Freshness

Last updated 2026-03-13 16:35:43.012240; freshness should be verified.

Geography

Orion A molecular cloud, specifically the Lynds 1641 dark cloud and the region around the star iota Orionis.