{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:TXWBMPYGOMHW2EG64NRHIK4MF4","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":"516d24848d1a757543af6c86ed1d992eca9f61c43a3db8fef21fff0c888ce6c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-09-15T03:33:36Z","title_canon_sha256":"bdfef00b72c048257c72f7af1a23c0739519d602370f68bbafb55b789e7b9e09"},"schema_version":"1.0","source":{"id":"1709.05044","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.05044","created_at":"2026-05-18T00:32:05Z"},{"alias_kind":"arxiv_version","alias_value":"1709.05044v1","created_at":"2026-05-18T00:32:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.05044","created_at":"2026-05-18T00:32:05Z"},{"alias_kind":"pith_short_12","alias_value":"TXWBMPYGOMHW","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"TXWBMPYGOMHW2EG6","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"TXWBMPYG","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:b5460719ab5021bc31d7d4837f861e6a571f9e5e8cfdc5584e704ee2f698955d","target":"graph","created_at":"2026-05-18T00:32:05Z","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 present Adaptive Optics-aided speckle observations of 47 young stars in the $\\epsilon$ Cha association, made at the 4-m Southern Astrophysical Research Telescope in the $I$-band. We resolved 10 new binary pairs, 5 previously known binaries and two triple systems, also previously known. In the separation range between 4 and 300 AU, the 30 association members of spectral types G0 and later host 6 binary companions, leading to the raw companion frequency of $0.010\\pm0.04$ per decade of separation, comparable to the main sequence dwarfs in the field. On the other hand, all 5 massive association","authors_text":"Andrei Tokovinin, Cesar Briceno","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-09-15T03:33:36Z","title":"New binaries in the epsilon Cha association"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.05044","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:da5cdc48da6bd7d3c4214106224a51d125926f702538a201fd663d870a5c390a","target":"record","created_at":"2026-05-18T00:32:05Z","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":"516d24848d1a757543af6c86ed1d992eca9f61c43a3db8fef21fff0c888ce6c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-09-15T03:33:36Z","title_canon_sha256":"bdfef00b72c048257c72f7af1a23c0739519d602370f68bbafb55b789e7b9e09"},"schema_version":"1.0","source":{"id":"1709.05044","kind":"arxiv","version":1}},"canonical_sha256":"9dec163f06730f6d10dee362742b8c2f3a9d60d218746215cf11db4cc44b7589","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9dec163f06730f6d10dee362742b8c2f3a9d60d218746215cf11db4cc44b7589","first_computed_at":"2026-05-18T00:32:05.126544Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:05.126544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nk6nJfc2fXNQxH0Y4VCpPxKmvbiKf7ADPqOljp80v7An9BI45RN/RYQbHbARy+rWb/bicMg9Mj8y/hWuOOieCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:05.127160Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.05044","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da5cdc48da6bd7d3c4214106224a51d125926f702538a201fd663d870a5c390a","sha256:b5460719ab5021bc31d7d4837f861e6a571f9e5e8cfdc5584e704ee2f698955d"],"state_sha256":"80a9ad0d0b13aacc317a5fb6dde7a6c2970d82a4495bee0847678a893bb284ca"}