{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:K5LTECAJOYQWRE4SFCHKC6AD5C","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4883e1e0de15a91a7f85fe05a86bb8f35b9a699df0043ee0ae842974a8819a39","cross_cats_sorted":["astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-06-08T17:55:02Z","title_canon_sha256":"cf12ed0176b07601c5b26d329b27585f144ffa2a9bf4ff2d14bd1a1ea93fd82c"},"schema_version":"1.0","source":{"id":"2606.09810","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.09810","created_at":"2026-06-09T02:09:11Z"},{"alias_kind":"arxiv_version","alias_value":"2606.09810v1","created_at":"2026-06-09T02:09:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.09810","created_at":"2026-06-09T02:09:11Z"},{"alias_kind":"pith_short_12","alias_value":"K5LTECAJOYQW","created_at":"2026-06-09T02:09:11Z"},{"alias_kind":"pith_short_16","alias_value":"K5LTECAJOYQWRE4S","created_at":"2026-06-09T02:09:11Z"},{"alias_kind":"pith_short_8","alias_value":"K5LTECAJ","created_at":"2026-06-09T02:09:11Z"}],"graph_snapshots":[{"event_id":"sha256:f1c495c7fa477abc4a830295e86396c1dfb8ed106c97c058223d45b805a99a6e","target":"graph","created_at":"2026-06-09T02:09:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.09810/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The second data release of the European Pulsar Timing Array (EPTA) collaboration provides evidence for the presence of a gravitational-wave (GW) background. In this work, we explore a potential cosmological interpretation of this signal in terms of inflationary scenarios. We parametrize the tensor power spectrum in terms of the tensor-to-scalar ratio $r$, the tensor spectral index $n_t$, the reheating temperature $T_{\\text{rh}}$, and the cut-off frequency $f_{\\text{end}}$. We incorporate all relevant observational constraints, including those from the Cosmic Microwave Background, Big Bang Nucl","authors_text":"Anton Chudaykin, Chiara Caprini, Delphine Perrodin, Gilles Theureau, Ismael Cognard, Lucas Guillemot, Martin Kunz, Philippe Turgeon","cross_cats":["astro-ph.GA","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-06-08T17:55:02Z","title":"Inflationary interpretation of the gravitational-wave signal in the European Pulsar Timing Array DR2 with constraints"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.09810","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:160f0400fc3400e065799a72c14138d75ee77f0e311114b51f8364e073e5f2f7","target":"record","created_at":"2026-06-09T02:09:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4883e1e0de15a91a7f85fe05a86bb8f35b9a699df0043ee0ae842974a8819a39","cross_cats_sorted":["astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-06-08T17:55:02Z","title_canon_sha256":"cf12ed0176b07601c5b26d329b27585f144ffa2a9bf4ff2d14bd1a1ea93fd82c"},"schema_version":"1.0","source":{"id":"2606.09810","kind":"arxiv","version":1}},"canonical_sha256":"57573208097621689392288ea17803e8aa70ef5a769728fcbd95ff8bfc85e78e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"57573208097621689392288ea17803e8aa70ef5a769728fcbd95ff8bfc85e78e","first_computed_at":"2026-06-09T02:09:11.608914Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-09T02:09:11.608914Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"318dvJ/mNG4xutUcy8X/q57w4PwRMmXG4njkuo/W7Zr5gUhk5PW9hEJAgVnGmINnrejoF4+/lbQTIhSHNpQtBQ==","signature_status":"signed_v1","signed_at":"2026-06-09T02:09:11.609850Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.09810","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:160f0400fc3400e065799a72c14138d75ee77f0e311114b51f8364e073e5f2f7","sha256:f1c495c7fa477abc4a830295e86396c1dfb8ed106c97c058223d45b805a99a6e"],"state_sha256":"81ca7e998757317acb9aa41c9fa9e16905c2d3e282b0a26361ca74d31164b7bc"}