47 Tucanae X-Ray Point Source Catalog from Chandra Observations (2017)

A 2017 catalog combines 180 ks of new and 370 ks of archival Chandra ACIS X-ray observations of the globular cluster 47 Tucanae from 2000, 2002, and 2014-2015. It identifies 370 point sources within the cluster's half-mass region, including 81 new sources, and associates some with known variable stars. The table was created by NASA HEASARC based on published catalog data.

Use Cases

• Studying faint X-ray source populations in crowded stellar cores based on the 370 identified sources.
• Cross-matching X-ray sources with known variable stars or radio pulsars based on the described associations.
• Analyzing temporal changes in X-ray emission by comparing with the related 2005 source catalog.
• Investigating cluster membership of X-ray sources based on their spatial concentration in the core region.

Strengths

• Combines 550 ks of total observation time from multiple Chandra epochs, providing a deeper source list.
• Identifies 370 X-ray sources, including 81 new ones not in previous catalogs.
• Uses improved algorithms for source detection and provides associations with optically identified variable stars.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/MNRAS/472/3706.

Collection Method

Combined analysis of Chandra ACIS observational data.

Time Range

Observations from 2000, 2002, and 2014-2015.

Freshness

Last updated 2026-03-13 18:07:54.875559; freshness should be verified.

Geography

Globular cluster 47 Tucanae (NGC 104).