ROSAT-PGC Cross-Match: 904 X-ray Sources with Optical Galaxy Counterparts

NASA HEASARC provides a cross-correlation of the ROSAT All-Sky Survey Bright Source Catalog with the Catalogue of Principal Galaxies. The dataset contains 1124 optical galaxy entries for 904 X-ray candidates, with 547 classified as reliable identifications. It includes compiled X-ray and optical parameters, plus optical images with X-ray overlay contours for visual screening.

Use Cases

• Identify candidate active galactic nuclei based on high X-ray luminosity sources mentioned in the description.
• Study correlations between X-ray and optical activity, particularly in spiral galaxies as noted in the description.
• Investigate X-ray emission from potential new galaxy groups or clusters using the defined candidate sample.
• Analyze luminosity and log N-log S distributions for different galaxy subsamples as referenced in the paper.

Strengths

• Includes 904 X-ray sources with possible extragalactic counterparts, with 547 classified as reliable identifications.
• Provides 1124 optical galaxy entries and 904 optical images with X-ray overlay contours for visual verification.
• Compiles both X-ray and optical parameters for each source, enabling multi-wavelength analysis.

Limitations

• Row count and column-level documentation are unknown, which may limit suitability assessment.
• Data may reflect observational biases inherent to the ROSAT survey and the PGC catalog.
• For some sources, X-ray flux may be affected by hot gas emission from known galaxy groups or clusters.

Provenance

Source

NASA HEASARC, based on CDS catalog J/A+A/378/30.

Collection Method

Correlation study and visual screening of the ROSAT All-Sky Survey Bright Source Catalog with the Catalogue of Principal Galaxies.

Time Range

Based on the ROSAT survey (1990-1999) and the PGC catalog.

Freshness

Last updated 2026-03-13 18:18:11.259745; freshness should be verified.

Geography

All-sky survey coverage.