{"as_of":"2026-08-09T16:41:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:9baa09249c70882ceb1b71f9e7111d2ffc38eb49424d94c72b8703d53e90311f","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":"2026-08-09T06:31:02.800959+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":"2026-08-03T17:08:37.007119Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"cited_works","source_observed_at":null,"state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1912.04103","last_updated":"2019-12-10T04:15:51Z","snapshot_observed_at":"2026-07-06T08:43:06.269882Z","submitted_at":"2019-12-09T15:09:14Z","title":"On using inspiralling supermassive binary black holes in the PTA frequency band as standard sirens to constrain dark energy","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1912.04103","snapshot_observed_at":"2026-08-03T17:08:37.007119Z","title":null,"venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2512.10729","last_updated":"2026-07-09T02:10:11Z","snapshot_observed_at":"2026-08-08T14:02:26.726377Z","submitted_at":"2025-12-11T15:10:43Z","title":"Two-Dimensional Pulsar Distance Inference from Nanohertz Gravitational Waves","version":3},"reference_index":16,"source":"pdf_text","source_observed_at":"2026-08-03T17:08:37.007119Z"},"links":{"cited_paper":"/paper/1912.04103","citing_paper":"/paper/2512.10729"},"observation_digest":"sha256:56472573cc18cd3fd0d18f886314e39b25baa867b7fe92346e6d1048458ee6bd","observation_id":"bd31a923-8336-4d09-bc35-47d4faedb607","resolution":{"observed_at":"2026-08-03T17:08:37.007119Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}}],"links":{"evidence":"/evidence","html":"/paper/1912.04103/citation-record","integrity":"/paper/1912.04103/integrity","json":"/paper/1912.04103/citation-record.json","paper":"/paper/1912.04103"},"outbound":[],"paper":{"arxiv_id":"1912.04103","last_updated":"2019-12-10T04:15:51Z","latest_version":2,"primary_category":"astro-ph.GA","snapshot_observed_at":"2026-07-06T08:43:06.269882Z","submitted_at":"2019-12-09T15:09:14Z","title":"On using inspiralling supermassive binary black holes in the PTA frequency band as standard sirens to constrain dark energy"},"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":"2026-08-09T06:31:02.800959+00:00","source":"crossref"},{"observed_at":"2026-08-09T06:30:57.326959+00:00","source":"retraction_watch"}],"thesis":"As of 9 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 1 inbound Pith citation observation for arXiv:1912.04103."}