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Description
The XMM-Newton Serendipitous Source Catalog from Stacked Observations (4XMM-DR14s) contains 427,524 unique X-ray sources compiled from 10,336 overlapping observations taken between 2000 and 2023. It includes 1,807,316 individual flux measurements, with source parameters like fluxes, hardness ratios, and variability information derived from simultaneous fits. The catalog was produced by the National Aeronautics and Space Administration (NASA) and aims to study the long-term behavior of X-ray emitting sources.
Use Cases
Analyzing long-term flux variability of X-ray sources based on the 1,807,316 individual flux measurements (visits).
Studying source population characteristics based on hardness ratios and fluxes in the five standard energy bands (0.2-12.0 keV).
Identifying and flagging spurious detections based on the described automated and manual quality control procedures.
Investigating multiply observed sky regions based on the 329,972 sources with multiple observations.
Strengths
Large scale with 427,524 unique sources and 1,807,316 flux measurements.
Long temporal coverage from observations taken between 2000-02-01 and 2023-11 16.
Includes quality assessment via automated flagging and manual visual screening of detections.
Parameters are derived from simultaneous fits across all overlapping observations.
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 observational bias inherent to the XMM-Newton mission's sky coverage.
Provenance
Source
National Aeronautics and Space Administration
Collection Method
Compiled from 1,751 groups of 10,336 overlapping public XMM-Newton observations with event-based astrometric corrections and PSF photometry applied.
Time Range
2000-02-01 to 2023-11-16
Freshness
Last updated 2026-03-13 17:46:06.990899; freshness should be verified.
Geography
Celestial sky coverage from the XMM-Newton satellite observations.
License is listed as 'other-license-specified'; specific terms must be checked. File formats include BIN and HTML.