1SWXRT: Seven-Year Swift-XRT Point Source Catalog (2005-2011)

Seven years (January 2005 to December 2011) of point source detections from the Swift satellite's X-ray Telescope (XRT). The catalog was built from 35,011 observations totaling ~140 million seconds of exposure, with analysis performed per observation to retain source variability information. It was generated by NASA using the XIMAGE package and provides count rates and fluxes in multiple X-ray energy bands.

Use Cases

• Analyzing X-ray source variability based on repeated observations of the same sky region.
• Cross-matching and comparing X-ray fluxes with other catalogs based on the standardized 0.5-10 keV energy band conversion.
• Studying spectral properties of sources using the provided hardness ratios.
• Identifying gamma-ray burst (GRB) associated fields from the subset of observations with exposures >10 ks.

Strengths

• Covers a significant seven-year time range (2005-2011), enabling temporal analysis.
• Built from a large number of individual observations (35,011), retaining detection-level detail.
• Provides data in three energy bands (Soft, Hard, Full) with derived hardness ratios and flux conversions.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Most observations have short exposures (~77% are under 5 ks), which may limit signal depth for faint sources.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Sources detected using the XIMAGE package (version 4.4.1) with a sliding-cell method on Swift-XRT observations in PC mode with exposure >500 s.

Time Range

January 2005 to December 2011

Freshness

Last updated 2026-03-13 17:24:18.280034; freshness should be verified.

Geography

Celestial (sky survey)