Omega Centauri X-Ray Point Source Catalog from Chandra Deep Survey

233 X-ray sources, including 95 new detections, identified in a 222-ks Chandra Observatory exposure of the Omega Centauri globular cluster. The catalog was created by NASA HEASARC in June 2018 based on data from observations in April 2012. It includes classifications for sources such as cataclysmic variables, a symbiotic star, and candidate millisecond pulsars.

Use Cases

• Identify and classify cataclysmic variables and low-mass X-ray binaries based on X-ray luminosity and spectral fits.
• Study the distribution and underabundance of X-ray sources like CVs within the cluster core and halo.
• Investigate candidate millisecond pulsar sources based on their X-ray luminosities and colors.
• Analyze the properties of the first identified symbiotic star (giant/white dwarf binary) in a globular cluster.
• Correlate X-ray source positions with optical counterparts for multi-wavelength analysis.

Strengths

• Contains 233 identified X-ray sources with 95 being new discoveries.
• Provides flux and luminosity limits (f_X ~ 3e-16 erg/s/cm², L_x ~ 1e30 erg/s) for the survey.
• Includes estimated counts of cluster members (~60 +/- 20) and specific object types (18 CVs/CV candidates).
• Based on a long, combined exposure time of ~222 ks from the Chandra ACIS-I detector.

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/479/2834.

Collection Method

Observations from the Chandra X-ray Observatory's ACIS-I detector on 2012 April 16 and 17.

Time Range

Observation dates 2012-04-16 and 2012-04-17.

Freshness

Last updated 2026-03-13 18:58:18.262635; freshness should be verified.

Geography

Omega Centauri globular cluster (NGC 5139).