{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:7C6ZCC7SGSF6DRBLZO4XQZ6CU3","short_pith_number":"pith:7C6ZCC7S","schema_version":"1.0","canonical_sha256":"f8bd910bf2348be1c42bcbb97867c2a6f70103cc251a658f9a25984a2aa9d55e","source":{"kind":"arxiv","id":"1409.3586","version":1},"attestation_state":"computed","paper":{"title":"Testing the planetary models of HU Aquarii","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Leckngam (NARIT), A. Prasit (NARIT), C. Copperwheat (LMJU), E. Breedt (Warwick), M. Bours (Warwick), S. Littlefair (Sheffield), S. Parsons (Valparaiso), T. Marsh (Warwick), V. Dhillon (Sheffield)","submitted_at":"2014-09-11T20:09:37Z","abstract_excerpt":"We present new eclipse observations of the polar (i.e. semi-detached magnetic white dwarf + M-dwarf binary) HU Aqr, and mid-egress times for each eclipse, which continue to be observed increasingly early. Recent eclipses occurred more than 70 seconds earlier than the prediction from the latest model that invoked a single circumbinary planet to explain the observed orbital period variations, thereby conclusively proving this model to be incorrect. Using ULTRACAM data, we show that mid-egress times determined for simultaneous data taken at different wavelengths agree with each other. The large v"},"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":"1409.3586","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-09-11T20:09:37Z","cross_cats_sorted":[],"title_canon_sha256":"51e38348fbfccb950b38e3a63b1698b819723eace3214db6a8059fb7aff8b613","abstract_canon_sha256":"9a60453ab5d65e3b6fdcfe11f06439ca6c6f1947ccc3191ac452514bdefd8733"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:03.234903Z","signature_b64":"ugc37UP7c4Uhqupj0WZbIPjBJKl3ViFiC+UNRm//n35Al5coknYizryqYNxsn2O95pl79+jw9jTOeNIYkGKfBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f8bd910bf2348be1c42bcbb97867c2a6f70103cc251a658f9a25984a2aa9d55e","last_reissued_at":"2026-05-18T01:42:03.234269Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:03.234269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Testing the planetary models of HU Aquarii","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Leckngam (NARIT), A. Prasit (NARIT), C. Copperwheat (LMJU), E. Breedt (Warwick), M. Bours (Warwick), S. Littlefair (Sheffield), S. Parsons (Valparaiso), T. Marsh (Warwick), V. Dhillon (Sheffield)","submitted_at":"2014-09-11T20:09:37Z","abstract_excerpt":"We present new eclipse observations of the polar (i.e. semi-detached magnetic white dwarf + M-dwarf binary) HU Aqr, and mid-egress times for each eclipse, which continue to be observed increasingly early. Recent eclipses occurred more than 70 seconds earlier than the prediction from the latest model that invoked a single circumbinary planet to explain the observed orbital period variations, thereby conclusively proving this model to be incorrect. Using ULTRACAM data, we show that mid-egress times determined for simultaneous data taken at different wavelengths agree with each other. The large v"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.3586","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":"1409.3586","created_at":"2026-05-18T01:42:03.234384+00:00"},{"alias_kind":"arxiv_version","alias_value":"1409.3586v1","created_at":"2026-05-18T01:42:03.234384+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.3586","created_at":"2026-05-18T01:42:03.234384+00:00"},{"alias_kind":"pith_short_12","alias_value":"7C6ZCC7SGSF6","created_at":"2026-05-18T12:28:16.859392+00:00"},{"alias_kind":"pith_short_16","alias_value":"7C6ZCC7SGSF6DRBL","created_at":"2026-05-18T12:28:16.859392+00:00"},{"alias_kind":"pith_short_8","alias_value":"7C6ZCC7S","created_at":"2026-05-18T12:28:16.859392+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/7C6ZCC7SGSF6DRBLZO4XQZ6CU3","json":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3.json","graph_json":"https://pith.science/api/pith-number/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/graph.json","events_json":"https://pith.science/api/pith-number/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/events.json","paper":"https://pith.science/paper/7C6ZCC7S"},"agent_actions":{"view_html":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3","download_json":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3.json","view_paper":"https://pith.science/paper/7C6ZCC7S","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1409.3586&json=true","fetch_graph":"https://pith.science/api/pith-number/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/graph.json","fetch_events":"https://pith.science/api/pith-number/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/action/storage_attestation","attest_author":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/action/author_attestation","sign_citation":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/action/citation_signature","submit_replication":"https://pith.science/pith/7C6ZCC7SGSF6DRBLZO4XQZ6CU3/action/replication_record"}},"created_at":"2026-05-18T01:42:03.234384+00:00","updated_at":"2026-05-18T01:42:03.234384+00:00"}