Gum 31: Chandra X-Ray Point Source Catalog for Young Stellar Population

679 X-ray point sources were detected in a deep 70 ks Chandra observation of the Gum 31 HII region. The catalog, created by NASA HEASARC based on published research, includes basic X-ray properties and near- and mid-infrared photometry for identified counterparts. The observation aimed to characterize the young stellar population in a region with high galactic field-star contamination.

Use Cases

• Identify young stellar objects based on X-ray emission to avoid biases from infrared-excess selection.
• Study the stellar population of the Gum 31 region and its relation to the Carina nebula complex.
• Cross-match X-ray sources with infrared and optical data for multi-wavelength analysis of stellar properties.

Strengths

• Deep 68,909-second (19.14 hour) Chandra observation provides sensitive X-ray detection.
• 75% of the 679 X-ray sources have identified counterparts in near-infrared, Spitzer, and optical data.
• Observation covers a 17' x 17' field of view, corresponding to 11.3 pc x 11.3 pc at the target's 2.3 kpc distance.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/A+A/564/A120.

Collection Method

X-ray observation using the Chandra ACIS-I instrument, with source detection and matching to infrared and optical archive data.

Freshness

Last updated 2026-03-13 19:28:18.518259; freshness should be verified.

Geography

The Gum 31 HII region and stellar cluster NGC 3324 in the Carina nebula complex.