SPIDERS XMM: Spectroscopic Catalog of 3,196 X-Ray Point Sources

NASA HEASARC provides the SPIDERS X-Ray Point Source Spectroscopic Catalog from the SDSS-IV program. It contains 11,092 observed spectra from a parent sample of 14,759 ROSAT and XMM sources over 5,129 square degrees, with 10,970 objects classified and 10,849 having secure redshifts. The catalog was created in May 2020 based on observations taken between 2014 and 2019.

Use Cases

• Classify X-ray source types (AGN, cluster galaxies, stars) based on spectroscopic data.
• Analyze redshift distributions for a large, systematic sample of X-ray selected objects.
• Cross-match and compare sources from the XMM Slew Survey and ROSAT All-Sky Survey.
• Study the properties of active galactic nuclei identified in the catalog.

Strengths

• Large systematic sample with 11,092 observed spectra.
• High classification and redshift completeness (98.9% and 97.8% respectively).
• Clear breakdown of object types: 10,070 AGN, 522 cluster galaxies, 294 stars.
• Defined spatial coverage of 5,129 square degrees from the eBOSS survey.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect temporal and instrumental bias inherent to the specific X-ray surveys used.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/A+A/636/A97.

Collection Method

Spectroscopic observations from the SDSS-IV/BOSS program.

Time Range

Observations taken between 2014 and 2019.

Freshness

Last updated 2026-03-13 19:00:21.620135; freshness should be verified.

Geography

Covers an area of 5,129 square degrees surveyed by SDSS-IV eBOSS.