INTEGRAL/ISGRI Catalog of Variable X-Ray Sources in Three Energy Bands

More than 500 X-ray sources detected by the INTEGRAL/ISGRI satellite over 6 years of operation. The catalog provides fractional variability, flux, and errors for these sources across the 20-40, 40-100, and 100-200 keV energy bands, compiled by the HEASARC in December 2010. It is based on data from the INTEGRAL Reference Catalog and the associated research paper.

Use Cases

• Classifying unidentified X-ray sources based on their variability properties mentioned in the description.
• Analyzing source activity across specific time periods using the map_det* and source_flag parameters.
• Studying spectral energy distributions using flux data across three distinct energy bands.
• Investigating detection artifacts and source interactions using the 'ghost' source flag indicator.

Strengths

• Contains data for more than 500 sources, many of which are new discoveries.
• Provides measurements across three specific energy bands (20-40, 40-100, 100 200 keV).
• Includes flags and parameters detailing detection conditions and time periods.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last updated 2026-03-13 18:35:18.944893; freshness should be verified.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/A+A/522/A68.

Collection Method

Compiled from the INTEGRAL Reference Catalog using a method to quantify source variability.

Time Range

Covers 6 years of INTEGRAL/ISGRI satellite operation.

Freshness

Catalog created in December 2010; last metadata update recorded in 2026.

Geography

Celestial (space-based observations).