CMa OB1: X-Ray and Near-Infrared Properties of Young Stellar Objects

A catalog of 387 X-ray sources from the Canis Major OB1 star-forming region, with 340 having near-infrared counterparts from 2MASS and WISE. The dataset provides photometry, age and mass estimates, and infrared classifications for young stellar objects, created by NASA using XMM-Newton observations. The data was last updated on March 13, 2026.

Use Cases

• Classifying young stellar objects based on infrared photometry and X-ray hardness ratios mentioned in the description.
• Analyzing the age and mass distribution of stars in the CMa R1 region using the provided estimates.
• Identifying probable members versus field objects in a star-forming association based on combined X-ray and infrared data.
• Studying the spatial distribution of stellar populations across four distinct observation fields (E, C, S, W).

Strengths

• Contains 387 X-ray sources with 340 having associated near-infrared counterparts.
• Provides a reliability flag ('AAA') for 290 X-ray sources based on high-quality 2MASS photometry.
• Combines multi-wavelength data from XMM-Newton, 2MASS, and WISE for source characterization.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 17:15:36.339302; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations from the XMM-Newton space telescope, cross-matched with the 2MASS and WISE infrared catalogs.

Freshness

Last updated 2026-03-13 17:15:36.339302

Geography

Four fields within the Canis Major OB1 association, specifically the CMa R1 region.