4XMM-DR14s: XMM-Newton Stacked X-Ray Source Catalog with 427,524 Unique Sources
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Description
The XMM-Newton Serendipitous Source Catalog from Stacked Observations contains 427,524 unique X-ray sources, with 329,972 observed multiple times. Compiled by NASA from 10,336 overlapping XMM-Newton observations taken between 2000 and 2023, it provides source parameters like fluxes and hardness ratios derived from simultaneous fits. The catalog includes 1,807,316 individual flux measurements aimed at studying long-term variability of X-ray emitting sources.
Use Cases
Analyzing long-term flux variability of X-ray sources based on multiple overlapping observations.
Studying source population statistics and hardness ratios across standard X-ray energy bands.
Investigating astrometric corrections and source detection quality flagged by automated and manual processes.
Strengths
Contains 427,524 unique sources, with 329,972 multiply observed for variability analysis.
Derived from 10,336 overlapping observations, providing long effective exposure times per sky area.
Includes 1,807,316 individual flux measurements and parameters from simultaneous fits.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Row count is unknown, which may limit suitability assessment.
Provenance
Source
National Aeronautics and Space Administration
Collection Method
Compiled from stacked source detection on overlapping XMM-Newton public observations.
Time Range
2000 February 1 to 2023 November 16
Freshness
Last updated 2026-03-13 18:22:19.770876; freshness should be verified.
Geography
null
License is listed as 'other-license-specified'; terms should be reviewed before use.