EinsteinLX&LBLValuesforIPCOStars: Soft X-ray Catalog for O-type Stars

Soft X-ray (0.2 - 3.5 keV) measurements for normal, massive O-type stars surveyed with the Einstein Observatory. The catalog contains 89 detections and 176 upper bounds, with L[x]/L[bol] values ranging from 10e-5.44 to 10e-7.35. This is a service provided by NASA HEASARC.

Use Cases

• Analyze the correlation between X-ray luminosity and bolometric luminosity based on listed L[x]/L[bol] values.
• Study X-ray variability in massive stars based on the note that at least 30% of O-type stars are variable.
• Investigate the absence of accretion-enhanced X-ray sources in O-type stars as discussed in the catalog.
• Model stellar X-ray emission mechanisms using the provided flux range spanning more than 3 orders of magnitude.

Strengths

• Catalog contains 89 detections and 176 upper bounds, providing a substantial observational sample.
• Includes detailed discussion of the data reduction process, suggesting methodological transparency.
• Provides specific luminosity ratios (L[x]/L[bol]) ranging from 10e-5.44 to 10e-7.35.

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 temporal bias inherent to the Einstein Observatory survey period.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC)

Collection Method

Observational data from the Einstein Observatory, with a detailed reduction process.

Time Range

Time range of the Einstein Observatory survey is not specified.

Freshness

Last updated 2026-03-13 18:17:04.158389; freshness should be verified.

Geography

Spatial coverage is not specified; data is for stellar objects.