Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links
Paper Citation Record · LEDGER
PKS 2131-021 -- Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary
As of 22 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 2 inbound Pith citation observations for arXiv:2407.09647.
A citation records a reference. It does not transfer a finding from one paper to another.
Coverage vector
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-22T06:32:14.747728+00:00
Pith citing papers itemized under the disclosed page cap.
Source: paper_references, paper_reference_links, observed 2026-07-12T05:10:13.912506Z
A source-named dated measurement, never combined with another source.
Source: arxiv_reference, observed 2026-08-05T02:28:24.338817Z
Reference resolution
0 of 0 outbound references displayed
- verified exact0
- verified fuzzy0
- unresolved0
- parse uncertain0
- malformed identifier0
- metadata mismatch0
External citation measurements
1
arxiv_reference, observed 2026-08-05T02:28:24.338817Z
Outbound references
No outbound reference observations are available for this paper version.
Pith citing papers
Observation c05d47b6-b4d9-43a2-8012-e332430d2fe0 · inbound
Constraining Orbital Eccentricity of a Supermassive Black Hole Binary Candidate PKS 2131-0211 cites this paper.
Constraining Orbital Eccentricity of a Supermassive Black Hole Binary Candidate PKS 2131-0211 PKS 2131-021 -- Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary
Reference 189
- Resolution
- verified exact
- arxiv_id, observed 2026-06-28T04:41:39.454820Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.
Observation 4f4aef92-31a0-4688-a6db-3328090b1788 · inbound
The SKAO Pulsar Timing Array cites this paper.
The SKAO Pulsar Timing Array PKS 2131-021 -- Discovery of Strong Coherent Sinusoidal Variations from Radio to Optical Frequencies: Compelling Evidence for a Blazar Supermassive Black Hole Binary
Reference 268
- Resolution
- unresolved
- no resolver link, observed 2026-07-12T05:10:13.912506Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.