{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:QF77IIMTUF4SP5CSGXZFU7OFRZ","short_pith_number":"pith:QF77IIMT","canonical_record":{"source":{"id":"1611.04053","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-12T23:43:15Z","cross_cats_sorted":[],"title_canon_sha256":"e890bbb9f68848965d5249e664c3b4625c8aef9d3330fdee8b7b7f44900162e9","abstract_canon_sha256":"b4372ddd496174a8a52d76daf36450b4bb86ee75b8154c8b38564f520eb162b0"},"schema_version":"1.0"},"canonical_sha256":"817ff42193a17927f45235f25a7dc58e452a793b76b67abf64314c0f1fb4547c","source":{"kind":"arxiv","id":"1611.04053","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.04053","created_at":"2026-05-18T00:53:02Z"},{"alias_kind":"arxiv_version","alias_value":"1611.04053v3","created_at":"2026-05-18T00:53:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.04053","created_at":"2026-05-18T00:53:02Z"},{"alias_kind":"pith_short_12","alias_value":"QF77IIMTUF4S","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"QF77IIMTUF4SP5CS","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"QF77IIMT","created_at":"2026-05-18T12:30:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:QF77IIMTUF4SP5CSGXZFU7OFRZ","target":"record","payload":{"canonical_record":{"source":{"id":"1611.04053","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-12T23:43:15Z","cross_cats_sorted":[],"title_canon_sha256":"e890bbb9f68848965d5249e664c3b4625c8aef9d3330fdee8b7b7f44900162e9","abstract_canon_sha256":"b4372ddd496174a8a52d76daf36450b4bb86ee75b8154c8b38564f520eb162b0"},"schema_version":"1.0"},"canonical_sha256":"817ff42193a17927f45235f25a7dc58e452a793b76b67abf64314c0f1fb4547c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:02.139634Z","signature_b64":"ld05HDPoAfNs0cC1+BdRPO/UcjHQmvmCux531GlTdAtkDjafULmZ4//WC1CB1ph9GjMosVhywuz9+VawPloJDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"817ff42193a17927f45235f25a7dc58e452a793b76b67abf64314c0f1fb4547c","last_reissued_at":"2026-05-18T00:53:02.138940Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:02.138940Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.04053","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:53:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jynGNR6IdAy+vmqakfBIB7o6aQROza0SLo+dKXU5YAgt6rT9p42XHfbwaAkxX9bNpWq7KSrXaXyuMv8fU5JCDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T16:46:26.795534Z"},"content_sha256":"2db797b6ed7e69798c9b94f5265c87d3f2f1ef3d68b0cedccbaeb5b463d88a31","schema_version":"1.0","event_id":"sha256:2db797b6ed7e69798c9b94f5265c87d3f2f1ef3d68b0cedccbaeb5b463d88a31"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:QF77IIMTUF4SP5CSGXZFU7OFRZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Structure of the Test Function for Phenomenological Modelling of Eclipsing Binaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Mariia G. Tkachenko","submitted_at":"2016-11-12T23:43:15Z","abstract_excerpt":"The dependence of the test function on the phenomenological parameters used in the \"NAV\" (\"New Algol Variable\") algorithm (Andronov, 2012Ap.....55..536A) is studied. Due to a presence of local minima, the method of minimization contains two steps: the \"brute force\" minimization at a grid in the 4D parameter space, and further iterations using the differential corrections. This method represents an effective approximation of the light curve using the special pattern (shape) separately for the primary and secondary minima. The application of the method to concrete stars is briefly reviewed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.04053","kind":"arxiv","version":3},"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":"2026-05-18T00:53:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2dYqHkTHg0tK8A4Gu5M2ur1qEWvnjqVsxM4FeDbl3PZ7iBXV6BRlLSkcThzu8EnyOcYF+klA1/3XKZHQveo/Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T16:46:26.795879Z"},"content_sha256":"e83652a620cf96a0531146b051658bdcda06b1797e3d2161cab3e434e44d6534","schema_version":"1.0","event_id":"sha256:e83652a620cf96a0531146b051658bdcda06b1797e3d2161cab3e434e44d6534"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QF77IIMTUF4SP5CSGXZFU7OFRZ/bundle.json","state_url":"https://pith.science/pith/QF77IIMTUF4SP5CSGXZFU7OFRZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QF77IIMTUF4SP5CSGXZFU7OFRZ/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":"2026-07-02T16:46:26Z","links":{"resolver":"https://pith.science/pith/QF77IIMTUF4SP5CSGXZFU7OFRZ","bundle":"https://pith.science/pith/QF77IIMTUF4SP5CSGXZFU7OFRZ/bundle.json","state":"https://pith.science/pith/QF77IIMTUF4SP5CSGXZFU7OFRZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QF77IIMTUF4SP5CSGXZFU7OFRZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:QF77IIMTUF4SP5CSGXZFU7OFRZ","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":"b4372ddd496174a8a52d76daf36450b4bb86ee75b8154c8b38564f520eb162b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-12T23:43:15Z","title_canon_sha256":"e890bbb9f68848965d5249e664c3b4625c8aef9d3330fdee8b7b7f44900162e9"},"schema_version":"1.0","source":{"id":"1611.04053","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.04053","created_at":"2026-05-18T00:53:02Z"},{"alias_kind":"arxiv_version","alias_value":"1611.04053v3","created_at":"2026-05-18T00:53:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.04053","created_at":"2026-05-18T00:53:02Z"},{"alias_kind":"pith_short_12","alias_value":"QF77IIMTUF4S","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"QF77IIMTUF4SP5CS","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"QF77IIMT","created_at":"2026-05-18T12:30:39Z"}],"graph_snapshots":[{"event_id":"sha256:e83652a620cf96a0531146b051658bdcda06b1797e3d2161cab3e434e44d6534","target":"graph","created_at":"2026-05-18T00:53:02Z","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":"The dependence of the test function on the phenomenological parameters used in the \"NAV\" (\"New Algol Variable\") algorithm (Andronov, 2012Ap.....55..536A) is studied. Due to a presence of local minima, the method of minimization contains two steps: the \"brute force\" minimization at a grid in the 4D parameter space, and further iterations using the differential corrections. This method represents an effective approximation of the light curve using the special pattern (shape) separately for the primary and secondary minima. The application of the method to concrete stars is briefly reviewed.","authors_text":"Mariia G. Tkachenko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-12T23:43:15Z","title":"The Structure of the Test Function for Phenomenological Modelling of Eclipsing Binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.04053","kind":"arxiv","version":3},"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":"sha256:2db797b6ed7e69798c9b94f5265c87d3f2f1ef3d68b0cedccbaeb5b463d88a31","target":"record","created_at":"2026-05-18T00:53:02Z","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":"b4372ddd496174a8a52d76daf36450b4bb86ee75b8154c8b38564f520eb162b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-12T23:43:15Z","title_canon_sha256":"e890bbb9f68848965d5249e664c3b4625c8aef9d3330fdee8b7b7f44900162e9"},"schema_version":"1.0","source":{"id":"1611.04053","kind":"arxiv","version":3}},"canonical_sha256":"817ff42193a17927f45235f25a7dc58e452a793b76b67abf64314c0f1fb4547c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"817ff42193a17927f45235f25a7dc58e452a793b76b67abf64314c0f1fb4547c","first_computed_at":"2026-05-18T00:53:02.138940Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:02.138940Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ld05HDPoAfNs0cC1+BdRPO/UcjHQmvmCux531GlTdAtkDjafULmZ4//WC1CB1ph9GjMosVhywuz9+VawPloJDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:02.139634Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.04053","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2db797b6ed7e69798c9b94f5265c87d3f2f1ef3d68b0cedccbaeb5b463d88a31","sha256:e83652a620cf96a0531146b051658bdcda06b1797e3d2161cab3e434e44d6534"],"state_sha256":"de05da01b9c879e5edab89f8bbbd0afdf30e887abd377bdd061b9d659d4513c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1/mb1J+DfhOWBD+SpO1pFVSQ+rLtbhAiZc6aEJkY0EuObwh33AfvJE9Z2fTvspuFuJbYBJIXn1/9LHCptOF4DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T16:46:26.797830Z","bundle_sha256":"aed8f31cac123cbb80543fdc28c9075a5056ea654b5d947bbe4f1511688dc0f2"}}