Lambda Orionis Cluster: X-Ray Point Source Catalog from XMM-Newton

167 X-ray point sources detected in the young Lambda Orionis star cluster by the XMM-Newton observatory in September 2006. The catalog, created by NASA's HEASARC in 2011, includes 58 sources identified with known cluster members and 23 with new photometric candidates. It provides data on source variability, spectral properties, and X-ray luminosity ratios for stars ranging from massive O-type stars down to low-mass M5.5 types.

Use Cases

• Comparative analysis of X-ray properties between stellar clusters based on the study's comparison with the Sigma Ori cluster.
• Modeling stellar coronal activity based on the described two-component plasma temperatures and subsolar abundances.
• Investigating X-ray variability and flare events in young stars based on the reported ~35% variability rate among late-type members.
• Studying the relationship between X-ray emission and circumstellar disks, although the description notes the sample for such stars is small.

Strengths

• Contains 167 X-ray sources detected above a 5-sigma threshold, providing a substantial sample for analysis.
• Includes spectral analysis results for the brightest sources, using multi-temperature plasma models.
• Provides specific observational details, including a 56ks observation window and the use of EPIC MOS, PN, and RGS instruments.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The description notes the sample of stars with circumstellar discs and accretion is too small for definitive conclusions.

Provenance

Source

National Aeronautics and Space Administration (NASA), HEASARC

Collection Method

Analysis of an XMM-Newton observation using EPIC imaging and low-resolution spectral data.

Time Range

Observation from September 28, 2006 to September 29, 2006.

Freshness

Last updated 2026-03-13 19:04:04.192504; freshness should be verified.

Geography

Astronomical observation focused on the Lambda Orionis star cluster.