{"as_of":"2026-08-23T17:11:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:e4fbcd4228fdddacb925419cb2826c985da7ed647c59a74d95596d5fbed6cd88","coverage":[{"denominator":0,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":1,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":1,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-23T06:30:58.430688+00:00","state":"measured"},{"denominator":1,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":1,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-10T19:34:58.097703Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"pith","source_observed_at":"2026-08-10T19:34:58.658128Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"2004.09987","last_updated":"2020-04-21T13:30:33Z","snapshot_observed_at":"2026-08-13T22:57:06.502806Z","submitted_at":"2020-04-21T13:30:33Z","title":"A Review of Contemporary Atomic Frequency Standards","version":1},"cited_work":{"arxiv_id":"2004.09987","doi":null,"metadata_source":"pith","pith_arxiv_id":"2004.09987","snapshot_observed_at":"2026-08-10T19:34:58.658128Z","title":"A Review of Contemporary Atomic Frequency Standards","venue":"physics.atom-ph","work_id":"9cf5d372-6c5f-4c8f-b5a4-327c9eca6314","year":2020},"citing_paper":{"arxiv_id":"2501.09973","last_updated":"2025-01-17T06:30:34Z","snapshot_observed_at":"2026-08-18T09:09:27.069306Z","submitted_at":"2025-01-17T06:30:34Z","title":"Determination of Land\\'{e} $g_J$ factor and Zeeman coefficients in ground-state $^{171}$Yb$^+$ and their applications to quantum frequency standards","version":1},"reference_index":1,"source":"pdf_text","source_observed_at":"2026-08-10T19:34:58.097703Z"},"links":{"cited_paper":"/paper/2004.09987","citing_paper":"/paper/2501.09973"},"observation_digest":"sha256:5f311c77f9af25f75cc87869e8197cddd1fe9e77d5290d1277252a8f1a34da67","observation_id":"57e9bb36-2800-4ef0-b8d3-d28263e01e16","resolution":{"observed_at":"2026-08-10T19:34:58.667571Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-23T06:30:58.430688+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-23T06:30:58.430688+00:00","source":"crossref"},{"observed_at":"2026-08-23T06:30:53.778098+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/2004.09987/citation-record","integrity":"/paper/2004.09987/integrity","json":"/paper/2004.09987/citation-record.json","paper":"/paper/2004.09987"},"outbound":[],"paper":{"arxiv_id":"2004.09987","last_updated":"2020-04-21T13:30:33Z","latest_version":1,"primary_category":"physics.atom-ph","snapshot_observed_at":"2026-08-13T22:57:06.502806Z","submitted_at":"2020-04-21T13:30:33Z","title":"A Review of Contemporary Atomic Frequency Standards"},"reference_resolution":{"displayed":0,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":0,"verified_exact":0,"verified_fuzzy":0},"total_outbound_references":0},"refusal":"A citation records a reference. It does not transfer a finding from one paper to another.","schema":"pith.paper-citation-record.v1","standing_sources":[{"observed_at":"2026-08-23T06:30:58.430688+00:00","source":"crossref"},{"observed_at":"2026-08-23T06:30:53.778098+00:00","source":"retraction_watch"}],"thesis":"As of 23 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 1 inbound Pith citation observation for arXiv:2004.09987."}