{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:QRSEESNPTCAAQOQ3EXZIL2TMTZ","short_pith_number":"pith:QRSEESNP","schema_version":"1.0","canonical_sha256":"84644249af9880083a1b25f285ea6c9e7468668a3c61c63e326cdbdc1cab96a3","source":{"kind":"arxiv","id":"1601.00412","version":1},"attestation_state":"computed","paper":{"title":"The active W UMa type binary star V781 Tau revisited","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Difu Guo, Dongyang Gao, Kai Li, Shaoming Hu, Xu Chen, Yuoguo Jiang","submitted_at":"2016-01-04T08:48:01Z","abstract_excerpt":"In this paper, new determined BVR_cI_c light curves and radial velocities of V781 Tau are presented. By analyzing the light curves and radial velocities simultaneously, we found that V781 Tau is a W-subtype medium contact binary star with a mass ratio of q=2.207+-0.005 and a contact degree of f=21.6(+-1.0)%. The difference between the two light maxima was explained by a dark spot on the less massive primary component. The orbital period change of V781 Tau was also investigated. A secular decrease at a rate of $-6.01(+-2.28)*10^{-8} d/yr and a cyclic modulation with a period of 44.8+-5.7 yr and"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1601.00412","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-04T08:48:01Z","cross_cats_sorted":[],"title_canon_sha256":"5d4e53ed3388ba7aa9801b4e71207d5a21b56d85773f22546ff6f04d055630e7","abstract_canon_sha256":"4962045f7a4555d5a630b3e5501f6f2b522c8b30cfae1421541d13976d977414"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:25.562327Z","signature_b64":"/+H8vSCn5zF9kKPvYlSSEu27f5J7DD1+thgvFhWeUBXvtfvR3NzkPz1T5qQ/Kcwn129kSpmRzaq8JmHIplM9AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84644249af9880083a1b25f285ea6c9e7468668a3c61c63e326cdbdc1cab96a3","last_reissued_at":"2026-05-18T01:21:25.561771Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:25.561771Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The active W UMa type binary star V781 Tau revisited","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Difu Guo, Dongyang Gao, Kai Li, Shaoming Hu, Xu Chen, Yuoguo Jiang","submitted_at":"2016-01-04T08:48:01Z","abstract_excerpt":"In this paper, new determined BVR_cI_c light curves and radial velocities of V781 Tau are presented. By analyzing the light curves and radial velocities simultaneously, we found that V781 Tau is a W-subtype medium contact binary star with a mass ratio of q=2.207+-0.005 and a contact degree of f=21.6(+-1.0)%. The difference between the two light maxima was explained by a dark spot on the less massive primary component. The orbital period change of V781 Tau was also investigated. A secular decrease at a rate of $-6.01(+-2.28)*10^{-8} d/yr and a cyclic modulation with a period of 44.8+-5.7 yr and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.00412","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1601.00412","created_at":"2026-05-18T01:21:25.561872+00:00"},{"alias_kind":"arxiv_version","alias_value":"1601.00412v1","created_at":"2026-05-18T01:21:25.561872+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.00412","created_at":"2026-05-18T01:21:25.561872+00:00"},{"alias_kind":"pith_short_12","alias_value":"QRSEESNPTCAA","created_at":"2026-05-18T12:30:41.710351+00:00"},{"alias_kind":"pith_short_16","alias_value":"QRSEESNPTCAAQOQ3","created_at":"2026-05-18T12:30:41.710351+00:00"},{"alias_kind":"pith_short_8","alias_value":"QRSEESNP","created_at":"2026-05-18T12:30:41.710351+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ","json":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ.json","graph_json":"https://pith.science/api/pith-number/QRSEESNPTCAAQOQ3EXZIL2TMTZ/graph.json","events_json":"https://pith.science/api/pith-number/QRSEESNPTCAAQOQ3EXZIL2TMTZ/events.json","paper":"https://pith.science/paper/QRSEESNP"},"agent_actions":{"view_html":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ","download_json":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ.json","view_paper":"https://pith.science/paper/QRSEESNP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1601.00412&json=true","fetch_graph":"https://pith.science/api/pith-number/QRSEESNPTCAAQOQ3EXZIL2TMTZ/graph.json","fetch_events":"https://pith.science/api/pith-number/QRSEESNPTCAAQOQ3EXZIL2TMTZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ/action/storage_attestation","attest_author":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ/action/author_attestation","sign_citation":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ/action/citation_signature","submit_replication":"https://pith.science/pith/QRSEESNPTCAAQOQ3EXZIL2TMTZ/action/replication_record"}},"created_at":"2026-05-18T01:21:25.561872+00:00","updated_at":"2026-05-18T01:21:25.561872+00:00"}