{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:3YZG6HNSLL4ZWFMQE5GX6RYDC5","short_pith_number":"pith:3YZG6HNS","canonical_record":{"source":{"id":"1812.01337","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-12-04T11:08:09Z","cross_cats_sorted":[],"title_canon_sha256":"1210af028fe0af93c242547a9c69dae1d5573befdc1284b2ea2bc3ad72f49ede","abstract_canon_sha256":"f0d47b34283df37b52c334bfa9aad9ee0dd3773dca1f91aefcae294a6a395503"},"schema_version":"1.0"},"canonical_sha256":"de326f1db25af99b1590274d7f47031776441fccfad00535cec41cea8c9a190e","source":{"kind":"arxiv","id":"1812.01337","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01337","created_at":"2026-05-17T23:59:12Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01337v1","created_at":"2026-05-17T23:59:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01337","created_at":"2026-05-17T23:59:12Z"},{"alias_kind":"pith_short_12","alias_value":"3YZG6HNSLL4Z","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"3YZG6HNSLL4ZWFMQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"3YZG6HNS","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:3YZG6HNSLL4ZWFMQE5GX6RYDC5","target":"record","payload":{"canonical_record":{"source":{"id":"1812.01337","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-12-04T11:08:09Z","cross_cats_sorted":[],"title_canon_sha256":"1210af028fe0af93c242547a9c69dae1d5573befdc1284b2ea2bc3ad72f49ede","abstract_canon_sha256":"f0d47b34283df37b52c334bfa9aad9ee0dd3773dca1f91aefcae294a6a395503"},"schema_version":"1.0"},"canonical_sha256":"de326f1db25af99b1590274d7f47031776441fccfad00535cec41cea8c9a190e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:12.747439Z","signature_b64":"SsAsVS6BSGgT9TnQWAKt0NoU2oJcGKgWkrNRPowgHv3lHlZpcjTttydYCO2QJRpOMOviqfRA1KRSMiCRcNGgBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"de326f1db25af99b1590274d7f47031776441fccfad00535cec41cea8c9a190e","last_reissued_at":"2026-05-17T23:59:12.746954Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:12.746954Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.01337","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:59:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HqCbpK+3tnVI+dMnKMpUnb7zmWhIjb6T/PBrntX8mCNiFF/n50EscIavdBfBsui3xOg3zCpp25QRLP3f89A5AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:18:38.987164Z"},"content_sha256":"87a76120b5c6d9de1218eeae827ad4cbc53fb740f8c46ec0ed28c262a19db075","schema_version":"1.0","event_id":"sha256:87a76120b5c6d9de1218eeae827ad4cbc53fb740f8c46ec0ed28c262a19db075"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:3YZG6HNSLL4ZWFMQE5GX6RYDC5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolutionary stage of the massive component of the double-lined eclipsing binary V380 Cygni","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Miszuda, J. Daszy\\'nska-Daszkiewicz, W. Szewczuk","submitted_at":"2018-12-04T11:08:09Z","abstract_excerpt":"We determine the age of the eclipsing binary V380 Cygni, whose components have a significant mass ratio, $M_B/M_A\\approx$ 0.6. Because this binary exhibits spectral lines of both components, the values of masses and radii could be determined with a very high accuracy. Assuming that both components are on the main sequence, we derive the age of about 16 Myr. However, in this case the primary needs a large overshooting from the convective core ($f_{\\rm{ov}} \\approx 0.04$) and higher metallicity ($Z \\approx 0.02$). It is difficult to tell whether such a high value of overshooting from the convect"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01337","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:59:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2DjSkxX7bEnJvjSRwEWvNZpmkXtx2OJp9fuI90+12Ur53DARy/DtrgYrjDZHBHlQiZKFDEv8ld/Hxrg+Dq5MCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:18:38.988025Z"},"content_sha256":"4d150d538cf29df6020d815747802809bf306900f7e198460fed295f31686536","schema_version":"1.0","event_id":"sha256:4d150d538cf29df6020d815747802809bf306900f7e198460fed295f31686536"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3YZG6HNSLL4ZWFMQE5GX6RYDC5/bundle.json","state_url":"https://pith.science/pith/3YZG6HNSLL4ZWFMQE5GX6RYDC5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3YZG6HNSLL4ZWFMQE5GX6RYDC5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-31T19:18:38Z","links":{"resolver":"https://pith.science/pith/3YZG6HNSLL4ZWFMQE5GX6RYDC5","bundle":"https://pith.science/pith/3YZG6HNSLL4ZWFMQE5GX6RYDC5/bundle.json","state":"https://pith.science/pith/3YZG6HNSLL4ZWFMQE5GX6RYDC5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3YZG6HNSLL4ZWFMQE5GX6RYDC5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3YZG6HNSLL4ZWFMQE5GX6RYDC5","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":"f0d47b34283df37b52c334bfa9aad9ee0dd3773dca1f91aefcae294a6a395503","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-12-04T11:08:09Z","title_canon_sha256":"1210af028fe0af93c242547a9c69dae1d5573befdc1284b2ea2bc3ad72f49ede"},"schema_version":"1.0","source":{"id":"1812.01337","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.01337","created_at":"2026-05-17T23:59:12Z"},{"alias_kind":"arxiv_version","alias_value":"1812.01337v1","created_at":"2026-05-17T23:59:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.01337","created_at":"2026-05-17T23:59:12Z"},{"alias_kind":"pith_short_12","alias_value":"3YZG6HNSLL4Z","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"3YZG6HNSLL4ZWFMQ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"3YZG6HNS","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:4d150d538cf29df6020d815747802809bf306900f7e198460fed295f31686536","target":"graph","created_at":"2026-05-17T23:59:12Z","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 determine the age of the eclipsing binary V380 Cygni, whose components have a significant mass ratio, $M_B/M_A\\approx$ 0.6. Because this binary exhibits spectral lines of both components, the values of masses and radii could be determined with a very high accuracy. Assuming that both components are on the main sequence, we derive the age of about 16 Myr. However, in this case the primary needs a large overshooting from the convective core ($f_{\\rm{ov}} \\approx 0.04$) and higher metallicity ($Z \\approx 0.02$). It is difficult to tell whether such a high value of overshooting from the convect","authors_text":"A. Miszuda, J. Daszy\\'nska-Daszkiewicz, W. Szewczuk","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-12-04T11:08:09Z","title":"Evolutionary stage of the massive component of the double-lined eclipsing binary V380 Cygni"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.01337","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":"sha256:87a76120b5c6d9de1218eeae827ad4cbc53fb740f8c46ec0ed28c262a19db075","target":"record","created_at":"2026-05-17T23:59:12Z","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":"f0d47b34283df37b52c334bfa9aad9ee0dd3773dca1f91aefcae294a6a395503","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-12-04T11:08:09Z","title_canon_sha256":"1210af028fe0af93c242547a9c69dae1d5573befdc1284b2ea2bc3ad72f49ede"},"schema_version":"1.0","source":{"id":"1812.01337","kind":"arxiv","version":1}},"canonical_sha256":"de326f1db25af99b1590274d7f47031776441fccfad00535cec41cea8c9a190e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de326f1db25af99b1590274d7f47031776441fccfad00535cec41cea8c9a190e","first_computed_at":"2026-05-17T23:59:12.746954Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:12.746954Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SsAsVS6BSGgT9TnQWAKt0NoU2oJcGKgWkrNRPowgHv3lHlZpcjTttydYCO2QJRpOMOviqfRA1KRSMiCRcNGgBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:12.747439Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.01337","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87a76120b5c6d9de1218eeae827ad4cbc53fb740f8c46ec0ed28c262a19db075","sha256:4d150d538cf29df6020d815747802809bf306900f7e198460fed295f31686536"],"state_sha256":"986f03d10d6474e16390a2dacd6ec54389638953a8129a947c9c4212d55f80c2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8MiaU7lfCTUunwv52NukGN5hcsexJdoIERG72sZa+A55R+X0Kn9UMp/5qKb2HcL1FUHqlkmjecOvXX2s1UESBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T19:18:38.992849Z","bundle_sha256":"ff74e8bbdaa02facdd1bdfc471f995f9625a41bab5de7de5cb08e132f09aea0d"}}