{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:2QPBXCI3A3O4WL7622AE2NEC3Z","short_pith_number":"pith:2QPBXCI3","canonical_record":{"source":{"id":"1101.2260","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-01-12T03:16:03Z","cross_cats_sorted":[],"title_canon_sha256":"70b8731529301fcf676fa9e34c08ae25334df2079f3e4a77eb1ef242cd40c1a7","abstract_canon_sha256":"b9135da675a9bdef874500920e0efa5b761c55b28a8ebd6aa2c59dcda34b6c09"},"schema_version":"1.0"},"canonical_sha256":"d41e1b891b06ddcb2ffed6804d3482de4a9d6e9e53bd36ccd51aa93c7b6e7fc9","source":{"kind":"arxiv","id":"1101.2260","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.2260","created_at":"2026-05-18T02:03:42Z"},{"alias_kind":"arxiv_version","alias_value":"1101.2260v1","created_at":"2026-05-18T02:03:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.2260","created_at":"2026-05-18T02:03:42Z"},{"alias_kind":"pith_short_12","alias_value":"2QPBXCI3A3O4","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2QPBXCI3A3O4WL76","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2QPBXCI3","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:2QPBXCI3A3O4WL7622AE2NEC3Z","target":"record","payload":{"canonical_record":{"source":{"id":"1101.2260","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-01-12T03:16:03Z","cross_cats_sorted":[],"title_canon_sha256":"70b8731529301fcf676fa9e34c08ae25334df2079f3e4a77eb1ef242cd40c1a7","abstract_canon_sha256":"b9135da675a9bdef874500920e0efa5b761c55b28a8ebd6aa2c59dcda34b6c09"},"schema_version":"1.0"},"canonical_sha256":"d41e1b891b06ddcb2ffed6804d3482de4a9d6e9e53bd36ccd51aa93c7b6e7fc9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:42.750006Z","signature_b64":"P08A3xv/SRRCpZpDG3Wnp2Dj38xlUAYZjSdV7Qt20hZNdoQRcNkwK/lLjUgpW1C/Recv7kfIlsuEbcxMpMhJDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d41e1b891b06ddcb2ffed6804d3482de4a9d6e9e53bd36ccd51aa93c7b6e7fc9","last_reissued_at":"2026-05-18T02:03:42.749618Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:42.749618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.2260","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:03:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ZPJ7fg2yVNpRF32Z/u7RjtiDnRI2JTJTt8ffkXiaVUeDEAftW9lS3E0KXZ70lWe78ZCWgXxcvIWYMzO6jO8AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T22:11:21.388244Z"},"content_sha256":"9f98d0f9c5b3d587e9aaa813ccb201b81aafdc2cf63fe8d541f667fe2233a38f","schema_version":"1.0","event_id":"sha256:9f98d0f9c5b3d587e9aaa813ccb201b81aafdc2cf63fe8d541f667fe2233a38f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:2QPBXCI3A3O4WL7622AE2NEC3Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"[O/Fe] Estimates for Carbon-Enhanced Metal-Poor Stars from Near-IR Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Bertrand Plez, Catherine R. Kennedy, Falk Herwig, Norbert Christlieb, Silvia Rossi, Thirupathi Sivarani, Timothy C. Beers, Vinicius M. Placco, Young Sun Lee","submitted_at":"2011-01-12T03:16:03Z","abstract_excerpt":"We report on oxygen abundances determined from medium-resolution near-IR spectroscopy for a sample of 57 carbon-enhanced metal-poor (CEMP) stars selected from the Hamburg/ESO survey. The majority of our program stars exhibit oxygen-to-iron ratios in the range +0.5 < [O/Fe]< +2.0. The [O/Fe] values for this sample are statistically compared to available high-resolution estimates for known CEMP stars, as well as to high-resolution estimates for a set of carbon-normal metal-poor stars. Carbon, nitrogen, and oxygen abundance patterns for a sub-sample of these stars are compared to yield prediction"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.2260","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:03:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tty/DqBb151hBhU+WciEm4gNoGq91GS2seGXedyu0XrDi3rpt0cApxI8tffxl90ZlEzO5GVtfstpLzA/2mo7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T22:11:21.388919Z"},"content_sha256":"9d3f0379f103b514ed179fa58477f6ffdad03f3da7b5c5b68301da04d70ca601","schema_version":"1.0","event_id":"sha256:9d3f0379f103b514ed179fa58477f6ffdad03f3da7b5c5b68301da04d70ca601"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2QPBXCI3A3O4WL7622AE2NEC3Z/bundle.json","state_url":"https://pith.science/pith/2QPBXCI3A3O4WL7622AE2NEC3Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2QPBXCI3A3O4WL7622AE2NEC3Z/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":"2026-05-24T22:11:21Z","links":{"resolver":"https://pith.science/pith/2QPBXCI3A3O4WL7622AE2NEC3Z","bundle":"https://pith.science/pith/2QPBXCI3A3O4WL7622AE2NEC3Z/bundle.json","state":"https://pith.science/pith/2QPBXCI3A3O4WL7622AE2NEC3Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2QPBXCI3A3O4WL7622AE2NEC3Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:2QPBXCI3A3O4WL7622AE2NEC3Z","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":"b9135da675a9bdef874500920e0efa5b761c55b28a8ebd6aa2c59dcda34b6c09","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-01-12T03:16:03Z","title_canon_sha256":"70b8731529301fcf676fa9e34c08ae25334df2079f3e4a77eb1ef242cd40c1a7"},"schema_version":"1.0","source":{"id":"1101.2260","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.2260","created_at":"2026-05-18T02:03:42Z"},{"alias_kind":"arxiv_version","alias_value":"1101.2260v1","created_at":"2026-05-18T02:03:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.2260","created_at":"2026-05-18T02:03:42Z"},{"alias_kind":"pith_short_12","alias_value":"2QPBXCI3A3O4","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2QPBXCI3A3O4WL76","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2QPBXCI3","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:9d3f0379f103b514ed179fa58477f6ffdad03f3da7b5c5b68301da04d70ca601","target":"graph","created_at":"2026-05-18T02:03:42Z","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 on oxygen abundances determined from medium-resolution near-IR spectroscopy for a sample of 57 carbon-enhanced metal-poor (CEMP) stars selected from the Hamburg/ESO survey. The majority of our program stars exhibit oxygen-to-iron ratios in the range +0.5 < [O/Fe]< +2.0. The [O/Fe] values for this sample are statistically compared to available high-resolution estimates for known CEMP stars, as well as to high-resolution estimates for a set of carbon-normal metal-poor stars. Carbon, nitrogen, and oxygen abundance patterns for a sub-sample of these stars are compared to yield prediction","authors_text":"Bertrand Plez, Catherine R. Kennedy, Falk Herwig, Norbert Christlieb, Silvia Rossi, Thirupathi Sivarani, Timothy C. Beers, Vinicius M. Placco, Young Sun Lee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-01-12T03:16:03Z","title":"[O/Fe] Estimates for Carbon-Enhanced Metal-Poor Stars from Near-IR Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.2260","kind":"arxiv","version":1},"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":"sha256:9f98d0f9c5b3d587e9aaa813ccb201b81aafdc2cf63fe8d541f667fe2233a38f","target":"record","created_at":"2026-05-18T02:03:42Z","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":"b9135da675a9bdef874500920e0efa5b761c55b28a8ebd6aa2c59dcda34b6c09","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-01-12T03:16:03Z","title_canon_sha256":"70b8731529301fcf676fa9e34c08ae25334df2079f3e4a77eb1ef242cd40c1a7"},"schema_version":"1.0","source":{"id":"1101.2260","kind":"arxiv","version":1}},"canonical_sha256":"d41e1b891b06ddcb2ffed6804d3482de4a9d6e9e53bd36ccd51aa93c7b6e7fc9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d41e1b891b06ddcb2ffed6804d3482de4a9d6e9e53bd36ccd51aa93c7b6e7fc9","first_computed_at":"2026-05-18T02:03:42.749618Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:42.749618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P08A3xv/SRRCpZpDG3Wnp2Dj38xlUAYZjSdV7Qt20hZNdoQRcNkwK/lLjUgpW1C/Recv7kfIlsuEbcxMpMhJDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:42.750006Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.2260","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f98d0f9c5b3d587e9aaa813ccb201b81aafdc2cf63fe8d541f667fe2233a38f","sha256:9d3f0379f103b514ed179fa58477f6ffdad03f3da7b5c5b68301da04d70ca601"],"state_sha256":"1897885ec6836f0d2bde882c2b2dbdbb91093a739742529b0fa2e45bb9661445"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JIF39X3J7tsO3rjAySOUixaX5gZASgqHP/zwOVyP8bgjPgmNEpxQj752z0HcETQ9u/wXf/LUJRlG7+gEngngAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T22:11:21.392002Z","bundle_sha256":"29c54ad747c7a8efbc6c174f07c33180e7566e650ad0ed3e9914395267e97d3c"}}