M 101 X-Ray Point Source Catalog from XMM-Newton Observations

108 X-ray point sources detected within the D25 ellipse of the spiral galaxy M 101 by XMM-Newton, with multiwavelength cross-correlations identifying counterparts. The catalog classifies sources into categories like X-ray binaries, supernova remnants, and supersoft sources, and analyzes their spectral, timing, and variability properties. The dataset was produced by the National Aeronautics and Space Administration and last updated in March 2026.

Use Cases

• Classifying X-ray sources into categories like X-ray binaries and supernova remnants based on the X-ray colour scheme described.
• Analyzing short-term and long-term variability of accreting sources based on the timing properties mentioned.
• Cross-correlating X-ray sources with counterparts in other wavelengths like H II regions, radio, and optical data as referenced.
• Identifying candidate transient sources based on the potential transient behavior noted between observations.

Strengths

• Contains 108 detected X-ray sources with multiwavelength counterpart information for many.
• Applies a detailed classification scheme, categorizing approximately 60% as X-ray binaries and identifying 14 candidate supersoft sources.
• Includes analysis of variability, with 16 sources showing short-term variability and ~40% showing long-term variability over up to ~10 years.

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 source contamination, such as background AGN being classified as XRBs due to similar spectral shapes.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations from the XMM-Newton space telescope, cross-correlated with archival Chandra and ROSAT data.

Time Range

Observations span a baseline of up to ~10 years, as mentioned for long-term variability.

Freshness

Last updated 2026-03 13 19:28:54.420294; freshness should be verified.

Geography

Sources are located within the D25 ellipse (~28.8 arcminutes diameter) of the spiral galaxy M 101.