{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:Y3O32GJOVIUO4PQE7NUC7I6UDM","short_pith_number":"pith:Y3O32GJO","canonical_record":{"source":{"id":"1508.03633","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-14T20:04:43Z","cross_cats_sorted":[],"title_canon_sha256":"ba0f10bd644976e11662b65374239266e4d342f35811948923e88892031a22b2","abstract_canon_sha256":"afd59a0de56718d1e65912bf66de4b20154ca940ac68b3fc56d000ab989fa4fd"},"schema_version":"1.0"},"canonical_sha256":"c6ddbd192eaa28ee3e04fb682fa3d41b05e4a6a3fdedac7f6b26aa8c494f9dbe","source":{"kind":"arxiv","id":"1508.03633","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.03633","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"arxiv_version","alias_value":"1508.03633v2","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.03633","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"pith_short_12","alias_value":"Y3O32GJOVIUO","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"Y3O32GJOVIUO4PQE","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"Y3O32GJO","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:Y3O32GJOVIUO4PQE7NUC7I6UDM","target":"record","payload":{"canonical_record":{"source":{"id":"1508.03633","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-14T20:04:43Z","cross_cats_sorted":[],"title_canon_sha256":"ba0f10bd644976e11662b65374239266e4d342f35811948923e88892031a22b2","abstract_canon_sha256":"afd59a0de56718d1e65912bf66de4b20154ca940ac68b3fc56d000ab989fa4fd"},"schema_version":"1.0"},"canonical_sha256":"c6ddbd192eaa28ee3e04fb682fa3d41b05e4a6a3fdedac7f6b26aa8c494f9dbe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:41.977482Z","signature_b64":"jSsnc/FbVr7WxnZnEsWQNhWjjx9ooDo7XZeJThcSLBXHTXb3avadtoqV6MHeeDe/OhJuqFj9XQ2VerKJ6I14CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6ddbd192eaa28ee3e04fb682fa3d41b05e4a6a3fdedac7f6b26aa8c494f9dbe","last_reissued_at":"2026-05-18T01:26:41.976718Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:41.976718Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.03633","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:26:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ird7f2kHvEIrSmRGdw67FtIDtPT2PnbpXfB7GLkFUyFCg5oss/tJV0GL0KcLRSbdEqTdGma3Wg0ytWZtwnsVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T17:21:57.919092Z"},"content_sha256":"da0cb0cf75a82aa388da65c7c11a5f1c64566cf2b8932224114ecd932e0f4dd3","schema_version":"1.0","event_id":"sha256:da0cb0cf75a82aa388da65c7c11a5f1c64566cf2b8932224114ecd932e0f4dd3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:Y3O32GJOVIUO4PQE7NUC7I6UDM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An evaluation of the membership probability of 212 $\\lambda$ Boo stars: I. A Catalogue","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Charles A. Kuehn, Chris Koen, Christopher J. Corbally, Ian Newsome, James E. Neff, Kwang-Ping Cheng, Quinlin Riggs, Richard O. Gray, Simon J. Murphy","submitted_at":"2015-08-14T20:04:43Z","abstract_excerpt":"The literature on the $\\lambda$ Boo stars has grown to become somewhat heterogenous, as different authors have applied different criteria across the UV, optical and infrared regions to determine the membership status of $\\lambda$ Boo candidates. We aim to clear up the confusion by consulting the literature on 212 objects that have been considered as $\\lambda$ Boo candidates, and subsequently evaluating the evidence in favour of their admission to the $\\lambda$ Boo class. We obtained new spectra of $\\sim$90 of these candidates and classified them on the MK system to aid in the membership evalua"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.03633","kind":"arxiv","version":2},"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":"2026-05-18T01:26:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kP26D+K06Xoq0NU0cYMWRWanWGC877BO5bI144MMYAISm7G41HwDwdY0PPx9KO+kbAs12ypPI6ZsEq2qms1KCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T17:21:57.919446Z"},"content_sha256":"111b8cc3ba24f446c4bf9b70c69a85e03d1ad201b586e5b6be20f08b0d810c41","schema_version":"1.0","event_id":"sha256:111b8cc3ba24f446c4bf9b70c69a85e03d1ad201b586e5b6be20f08b0d810c41"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y3O32GJOVIUO4PQE7NUC7I6UDM/bundle.json","state_url":"https://pith.science/pith/Y3O32GJOVIUO4PQE7NUC7I6UDM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y3O32GJOVIUO4PQE7NUC7I6UDM/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":"2026-07-01T17:21:57Z","links":{"resolver":"https://pith.science/pith/Y3O32GJOVIUO4PQE7NUC7I6UDM","bundle":"https://pith.science/pith/Y3O32GJOVIUO4PQE7NUC7I6UDM/bundle.json","state":"https://pith.science/pith/Y3O32GJOVIUO4PQE7NUC7I6UDM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y3O32GJOVIUO4PQE7NUC7I6UDM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:Y3O32GJOVIUO4PQE7NUC7I6UDM","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":"afd59a0de56718d1e65912bf66de4b20154ca940ac68b3fc56d000ab989fa4fd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-14T20:04:43Z","title_canon_sha256":"ba0f10bd644976e11662b65374239266e4d342f35811948923e88892031a22b2"},"schema_version":"1.0","source":{"id":"1508.03633","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.03633","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"arxiv_version","alias_value":"1508.03633v2","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.03633","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"pith_short_12","alias_value":"Y3O32GJOVIUO","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"Y3O32GJOVIUO4PQE","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"Y3O32GJO","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:111b8cc3ba24f446c4bf9b70c69a85e03d1ad201b586e5b6be20f08b0d810c41","target":"graph","created_at":"2026-05-18T01:26:41Z","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 literature on the $\\lambda$ Boo stars has grown to become somewhat heterogenous, as different authors have applied different criteria across the UV, optical and infrared regions to determine the membership status of $\\lambda$ Boo candidates. We aim to clear up the confusion by consulting the literature on 212 objects that have been considered as $\\lambda$ Boo candidates, and subsequently evaluating the evidence in favour of their admission to the $\\lambda$ Boo class. We obtained new spectra of $\\sim$90 of these candidates and classified them on the MK system to aid in the membership evalua","authors_text":"Charles A. Kuehn, Chris Koen, Christopher J. Corbally, Ian Newsome, James E. Neff, Kwang-Ping Cheng, Quinlin Riggs, Richard O. Gray, Simon J. Murphy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-14T20:04:43Z","title":"An evaluation of the membership probability of 212 $\\lambda$ Boo stars: I. A Catalogue"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.03633","kind":"arxiv","version":2},"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:da0cb0cf75a82aa388da65c7c11a5f1c64566cf2b8932224114ecd932e0f4dd3","target":"record","created_at":"2026-05-18T01:26:41Z","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":"afd59a0de56718d1e65912bf66de4b20154ca940ac68b3fc56d000ab989fa4fd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-14T20:04:43Z","title_canon_sha256":"ba0f10bd644976e11662b65374239266e4d342f35811948923e88892031a22b2"},"schema_version":"1.0","source":{"id":"1508.03633","kind":"arxiv","version":2}},"canonical_sha256":"c6ddbd192eaa28ee3e04fb682fa3d41b05e4a6a3fdedac7f6b26aa8c494f9dbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6ddbd192eaa28ee3e04fb682fa3d41b05e4a6a3fdedac7f6b26aa8c494f9dbe","first_computed_at":"2026-05-18T01:26:41.976718Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:41.976718Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jSsnc/FbVr7WxnZnEsWQNhWjjx9ooDo7XZeJThcSLBXHTXb3avadtoqV6MHeeDe/OhJuqFj9XQ2VerKJ6I14CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:41.977482Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.03633","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da0cb0cf75a82aa388da65c7c11a5f1c64566cf2b8932224114ecd932e0f4dd3","sha256:111b8cc3ba24f446c4bf9b70c69a85e03d1ad201b586e5b6be20f08b0d810c41"],"state_sha256":"c12c346d39ece4693f7ab3967ef28c12e10be5f66f04eb463955a7ff18318c3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7cZ6wifFiZ3C70Pp03INJBCVPN+PufHErqfi57eaMUyH62RXqX7m5DfScVf75yEnpXnHJ2asEggOBwN/bvW0Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T17:21:57.921267Z","bundle_sha256":"b9a4dffc2a4b980ea6ed5b8de5ee786a7233f2afb7a3672154b6a5f9c50c9bef"}}