XMM-Newton OB Stars Catalog: X-ray Counterparts for ~300 Massive Stars

NASA HEASARC provides a catalog of X-ray emitters among early-type stars, correlating the Reed Catalog of galactic OB Stars with the 2XMMi Catalog. About 300 OB stars were detected with XMM-Newton, with half bright enough for spectral analysis, and detailed spectral properties are made available. This table was created by the HEASARC in November 2009 based on CDS data.

Use Cases

• Modeling stellar X-ray emission mechanisms based on spectral properties like temperature components and absorption columns.
• Analyzing the correlation between X-ray and bolometric luminosity (L_X - L_bol relation) for O and B stars.
• Investigating X-ray variability patterns (short-term vs. long-term) in early-type stars.
• Comparing X-ray survey results from XMM-Newton with earlier ROSAT All-Sky Survey (RASS) findings.

Strengths

• Provides detailed spectral properties for about half of the ~300 detected OB stars.
• Derived from public XMM observations (2XMMi) and slew survey data (XMMSL1), offering a survey beyond individual cluster reports.
• Includes analysis of variability, finding long-term variations affect between one third and two thirds of sources.

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 bias inherent to the XMM-Newton public observation catalog.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC)

Collection Method

Correlation between the Reed Catalog of galactic OB Stars and the 2XMMi Catalog of XMM-Newton observations.

Time Range

Based on XMM-Newton observations available as of 2009.

Freshness

Last updated 2026-03-13 17:28:04.739575; freshness should be verified.

Geography

Galactic (focus on stars within the Milky Way).