ROSAT HRI Orion Group 1 Stars: X-Ray Luminosity Data for 175 Stars
Updated 3mo ago
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Description
The Orion Nebula star-forming region is the focus of this catalog, which presents results from three deep ROSAT High Resolution Imager observations. It contains X-ray and other data for 175 Orion stars, including X-ray luminosities and luminosity ratios, derived from 389 distinct X-ray sources detected in a roughly 0.8 square degree area centered on the Trapezium. The data is a representation of Table 6 from the 1995 research paper by Gagne et al., provided by NASA HEASARC.
Use Cases
Study the relationship between stellar spectral type and X-ray activity based on the detection of emission from stars of all spectral types.
Analyze X-ray luminosity upper limits for undetected late-type pre-main-sequence stars mentioned in the description.
Investigate the correlation between coronal X-ray emission and effective temperature using the derived log Lx and log Lx/Lbol values.
Examine X-ray source associations with proper-motion cluster members, where at least two-thirds of sources were linked to a single member.
Strengths
Data is derived from 3 deep ROSAT HRI observations, covering over 1500 catalogued stars.
Includes X-ray data (detections or upper limits) for 175 specific stars with available spectral types and rotational information.
Conversion to X-ray luminosities used individual assumptions for distance, column density, and visual extinction.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Row count is unknown, which may limit suitability assessment.
Data may reflect observational and methodological bias inherent to the specific ROSAT HRI instrument and 1995 analysis.
Provenance
Source
National Aeronautics and Space Administration (NASA HEASARC)
Collection Method
Observational data from the ROSAT High Resolution Imager (HRI), processed and presented in the research paper by Gagne et al. (1995).
Time Range
Observational timeframe not specified; associated research paper published in 1995.
Freshness
Last updated 2026-03-13 17:10:39.518761; freshness should be verified.
Geography
Centered on the Trapezium in the Orion Nebula star-forming region, covering a roughly 0.8 square degree area.
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