ROSAT Survey: 389 X-ray Sources in the Orion Nebula Star-Forming Region

389 distinct X-ray sources were detected in the Orion Nebula from three deep ROSAT HRI observations, covering a region containing over 1500 catalogued stars. The catalog, created by NASA HEASARC in 1997, concatenates optical counterpart data from the 1995 Gagne et al. research paper. It focuses on X-ray emission from late-type pre-main-sequence stars, with 324 sources having a single optical counterpart and 50 having multiple candidates.

Use Cases

• Classifying stellar X-ray activity based on spectral type associations mentioned in the description.
• Studying the correlation between X-ray emission and stellar evolution in pre-main-sequence stars.
• Cross-matching X-ray sources with optical catalogs for multi-wavelength analysis of the Orion region.

Strengths

• 389 distinct X-ray sources detected with a 3-sigma criterion.
• Over 1500 catalogued stars covered in the roughly 0.8 square degree survey region.
• Data originates from a peer-reviewed 1995 research paper (Gagne et al.) and was processed by NASA HEASARC.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The database does not include the supplementary optical and rotational data from Table 6 of the original paper.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC).

Collection Method

Concatenation of tables from a 1995 research paper based on three deep ROSAT HRI observations.

Time Range

Observational data from the ROSAT mission (likely early 1990s).

Freshness

Last updated 2026-03-13 19:21:51.694376; freshness should be verified.

Geography

Centered on the Trapezium in the Orion Nebula star-forming region.