{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:IRJ7OMZPUDVNUQJMTDJUUX443Y","short_pith_number":"pith:IRJ7OMZP","canonical_record":{"source":{"id":"1306.4334","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-06-18T20:01:35Z","cross_cats_sorted":[],"title_canon_sha256":"7763ad7f9d88013543b38c6f0a847df97fefab1214cc32c8b6d1e7705f4329b1","abstract_canon_sha256":"2ad251330fd73bb69c678f22f35a86e8ecb14b6f4dfb67a6e2916ffd0d899b8c"},"schema_version":"1.0"},"canonical_sha256":"4453f7332fa0eada412c98d34a5f9cde2e498473a04e70568d62a93bd9d13841","source":{"kind":"arxiv","id":"1306.4334","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.4334","created_at":"2026-05-18T01:49:15Z"},{"alias_kind":"arxiv_version","alias_value":"1306.4334v3","created_at":"2026-05-18T01:49:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.4334","created_at":"2026-05-18T01:49:15Z"},{"alias_kind":"pith_short_12","alias_value":"IRJ7OMZPUDVN","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"IRJ7OMZPUDVNUQJM","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"IRJ7OMZP","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:IRJ7OMZPUDVNUQJMTDJUUX443Y","target":"record","payload":{"canonical_record":{"source":{"id":"1306.4334","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-06-18T20:01:35Z","cross_cats_sorted":[],"title_canon_sha256":"7763ad7f9d88013543b38c6f0a847df97fefab1214cc32c8b6d1e7705f4329b1","abstract_canon_sha256":"2ad251330fd73bb69c678f22f35a86e8ecb14b6f4dfb67a6e2916ffd0d899b8c"},"schema_version":"1.0"},"canonical_sha256":"4453f7332fa0eada412c98d34a5f9cde2e498473a04e70568d62a93bd9d13841","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:15.290757Z","signature_b64":"HNbif3D8oXO2V52d0KO8nulIIvEAd8n1RLzRSxm+1l9YXl3LFmw98PeGbOegcCfLK0iel54/O+B4mnWdDnAoDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4453f7332fa0eada412c98d34a5f9cde2e498473a04e70568d62a93bd9d13841","last_reissued_at":"2026-05-18T01:49:15.290066Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:15.290066Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.4334","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":"2026-05-18T01:49:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rN8kTgF8fYa37OMY8sYo2nNHb+9NlyumpUe+qWTn3eS5PaP5Og+1h8Va7BnWk061PmCqmSnrbPLK6Ij8nKi9AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:17:23.736250Z"},"content_sha256":"797ed2cfa6c4b99fa3d19b5aedda67b6da9dba67a07e0c17d67b3aac39e66769","schema_version":"1.0","event_id":"sha256:797ed2cfa6c4b99fa3d19b5aedda67b6da9dba67a07e0c17d67b3aac39e66769"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:IRJ7OMZPUDVNUQJMTDJUUX443Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The quadruple pre-main sequence system LkCa3: Implications for stellar evolution models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"(2) Lowell Observatory, (3) Yale University, (4) CHARA, (5) University of Wisconsin-Madison), Dary Ruiz-Rodriguez (2), David W. Latham (1) ((1) CfA, G. H. Schaefer (4), Guillermo Torres (1), Lawrence H. Wasserman (2), L. Prato (2), Mariona Badenas (3), Robert D. Mathieu (5)","submitted_at":"2013-06-18T20:01:35Z","abstract_excerpt":"We report the discovery that the pre-main sequence object LkCa3 in the Taurus-Auriga star-forming region is a hierarchical quadruple system of M stars. It was previously known to be a close (~0.5 arc sec) visual pair, with one component being a moderately eccentric 12.94-day single-lined spectroscopic binary. A re-analysis of archival optical spectra complemented with new near-infrared spectroscopy shows both visual components to be double-lined, the second one having a period of 4.06 days and a circular orbit. In addition to the orbital elements, we determine optical and near-infrared flux ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.4334","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":"2026-05-18T01:49:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zUq/xbm9hAJf7K/u1kfGU5SCYSBww4MRFWvz5qlQX8zsZ4t3fvIQbKVk/jSIa6TLaia6LMATPI87RGUh/o/LBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:17:23.736840Z"},"content_sha256":"e76b11cd87953903ebbdda9b7b096ac26343fbc336d73dc992d932a932468b3d","schema_version":"1.0","event_id":"sha256:e76b11cd87953903ebbdda9b7b096ac26343fbc336d73dc992d932a932468b3d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IRJ7OMZPUDVNUQJMTDJUUX443Y/bundle.json","state_url":"https://pith.science/pith/IRJ7OMZPUDVNUQJMTDJUUX443Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IRJ7OMZPUDVNUQJMTDJUUX443Y/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":"2026-05-26T18:17:23Z","links":{"resolver":"https://pith.science/pith/IRJ7OMZPUDVNUQJMTDJUUX443Y","bundle":"https://pith.science/pith/IRJ7OMZPUDVNUQJMTDJUUX443Y/bundle.json","state":"https://pith.science/pith/IRJ7OMZPUDVNUQJMTDJUUX443Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IRJ7OMZPUDVNUQJMTDJUUX443Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:IRJ7OMZPUDVNUQJMTDJUUX443Y","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":"2ad251330fd73bb69c678f22f35a86e8ecb14b6f4dfb67a6e2916ffd0d899b8c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-06-18T20:01:35Z","title_canon_sha256":"7763ad7f9d88013543b38c6f0a847df97fefab1214cc32c8b6d1e7705f4329b1"},"schema_version":"1.0","source":{"id":"1306.4334","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.4334","created_at":"2026-05-18T01:49:15Z"},{"alias_kind":"arxiv_version","alias_value":"1306.4334v3","created_at":"2026-05-18T01:49:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.4334","created_at":"2026-05-18T01:49:15Z"},{"alias_kind":"pith_short_12","alias_value":"IRJ7OMZPUDVN","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"IRJ7OMZPUDVNUQJM","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"IRJ7OMZP","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:e76b11cd87953903ebbdda9b7b096ac26343fbc336d73dc992d932a932468b3d","target":"graph","created_at":"2026-05-18T01:49:15Z","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 report the discovery that the pre-main sequence object LkCa3 in the Taurus-Auriga star-forming region is a hierarchical quadruple system of M stars. It was previously known to be a close (~0.5 arc sec) visual pair, with one component being a moderately eccentric 12.94-day single-lined spectroscopic binary. A re-analysis of archival optical spectra complemented with new near-infrared spectroscopy shows both visual components to be double-lined, the second one having a period of 4.06 days and a circular orbit. In addition to the orbital elements, we determine optical and near-infrared flux ra","authors_text":"(2) Lowell Observatory, (3) Yale University, (4) CHARA, (5) University of Wisconsin-Madison), Dary Ruiz-Rodriguez (2), David W. Latham (1) ((1) CfA, G. H. Schaefer (4), Guillermo Torres (1), Lawrence H. Wasserman (2), L. Prato (2), Mariona Badenas (3), Robert D. Mathieu (5)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-06-18T20:01:35Z","title":"The quadruple pre-main sequence system LkCa3: Implications for stellar evolution models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.4334","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":"sha256:797ed2cfa6c4b99fa3d19b5aedda67b6da9dba67a07e0c17d67b3aac39e66769","target":"record","created_at":"2026-05-18T01:49:15Z","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":"2ad251330fd73bb69c678f22f35a86e8ecb14b6f4dfb67a6e2916ffd0d899b8c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-06-18T20:01:35Z","title_canon_sha256":"7763ad7f9d88013543b38c6f0a847df97fefab1214cc32c8b6d1e7705f4329b1"},"schema_version":"1.0","source":{"id":"1306.4334","kind":"arxiv","version":3}},"canonical_sha256":"4453f7332fa0eada412c98d34a5f9cde2e498473a04e70568d62a93bd9d13841","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4453f7332fa0eada412c98d34a5f9cde2e498473a04e70568d62a93bd9d13841","first_computed_at":"2026-05-18T01:49:15.290066Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:15.290066Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HNbif3D8oXO2V52d0KO8nulIIvEAd8n1RLzRSxm+1l9YXl3LFmw98PeGbOegcCfLK0iel54/O+B4mnWdDnAoDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:15.290757Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.4334","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:797ed2cfa6c4b99fa3d19b5aedda67b6da9dba67a07e0c17d67b3aac39e66769","sha256:e76b11cd87953903ebbdda9b7b096ac26343fbc336d73dc992d932a932468b3d"],"state_sha256":"1d70d3cdb422902d3f19597bb31bc3a8dd43851c1e8cb7900cf31199cb9bc69e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uem3uAjJP0E0PISl8IPkGpGfkhb4PI6+9dPFGFnY1fYbg+YieuRnO+d2+usXB1LbqTQ2n7g2RUjYnz2JdkzCAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T18:17:23.740276Z","bundle_sha256":"2a2a066be83d250107fa9e44d07b7bbdd3fd1f13eec870f7d276e28b191034eb"}}