{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XF7BPJVAHPPLEFIJKZOGWJPQOD","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":"9635a384e73552122a15cabe4bd51f931e52f03a8c3d7cf6802dff238ba14e9d","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-03T14:39:04Z","title_canon_sha256":"a36230ed9c67b3e5508b7f6aa060d724bca5ee8c8a04ba3b1d2598e199ad6f66"},"schema_version":"1.0","source":{"id":"1606.01108","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.01108","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"1606.01108v1","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.01108","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"XF7BPJVAHPPL","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XF7BPJVAHPPLEFIJ","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XF7BPJVA","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:761957bf2cf7a78c75d56b77c4d468e650205e897ba297eba3394b20b1fe2354","target":"graph","created_at":"2026-05-18T01:10:29Z","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"},"paper":{"abstract_excerpt":"We report new CHARA/MIRC interferometric observations of the Cepheid archetype $\\delta$ Cep, which aimed at detecting the newly discovered spectroscopic companion. We reached a maximum dynamic range $\\Delta H $ = 6.4, 5.8, and 5.2 mag, respectively within the relative distance to the Cepheid $r < 25$ mas, $25 < r < 50$ mas and $50 < r < 100$ mas. Our observations did not show strong evidence of a companion. We have a marginal detection at $3\\sigma$ with a flux ratio of 0.21\\%, but nothing convincing as we found other possible probable locations. We ruled out the presence of companion with a sp","authors_text":"A. Gallenne, A. Merand, G. H. Schaefer, G. Pietrzynski, H. McAlister, J. D. Monnier, J. Sturmann, L. Sturmann, N. Turner, P. Kervella, R. I. Anderson, R. M. Roettenbacher, T. ten Brummelaar, W. Gieren","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-03T14:39:04Z","title":"Multiplicity of Galactic Cepheids from long-baseline interferometry~III. Sub-percent limits on the relative brightness of a close companion of $\\delta$~Cephei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.01108","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:a9be653bc4ba79336b3886f7bd480d862f9c6be0ae37f54a858d7f26f8c73f5d","target":"record","created_at":"2026-05-18T01:10:29Z","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":"9635a384e73552122a15cabe4bd51f931e52f03a8c3d7cf6802dff238ba14e9d","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-03T14:39:04Z","title_canon_sha256":"a36230ed9c67b3e5508b7f6aa060d724bca5ee8c8a04ba3b1d2598e199ad6f66"},"schema_version":"1.0","source":{"id":"1606.01108","kind":"arxiv","version":1}},"canonical_sha256":"b97e17a6a03bdeb21509565c6b25f070efb7b8bf84d394d51668dd002717baca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b97e17a6a03bdeb21509565c6b25f070efb7b8bf84d394d51668dd002717baca","first_computed_at":"2026-05-18T01:10:29.315877Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:29.315877Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bzWpQ7CLGgVfM/AAup2DmKZ5tPp5NL+We84eIqLhbAhoFFXgBWlnzNe1zTtrNdzaPbEMLqn2mPegEUBQb3vKAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:29.316712Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.01108","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9be653bc4ba79336b3886f7bd480d862f9c6be0ae37f54a858d7f26f8c73f5d","sha256:761957bf2cf7a78c75d56b77c4d468e650205e897ba297eba3394b20b1fe2354"],"state_sha256":"7bc7985d4f067e7cbb311f40d28ec3c03a8c75b42d1fe2a14193d80196f2d9b3"}