{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:UWSYWEXBECH3SVVRYZQB3ST3OQ","short_pith_number":"pith:UWSYWEXB","canonical_record":{"source":{"id":"2104.04265","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-04-09T09:24:58Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"8e18950d468b05faff48945c318949bb605fe0bd1e00be2401e606a1145073df","abstract_canon_sha256":"099c3a106018d27fb32b66ac1b9dcee26b52d3ec5c1cddf8727f6e09a224cd98"},"schema_version":"1.0"},"canonical_sha256":"a5a58b12e1208fb956b1c6601dca7b74251af5354e19b0b1b7d8a441e5abd70f","source":{"kind":"arxiv","id":"2104.04265","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.04265","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"arxiv_version","alias_value":"2104.04265v1","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.04265","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"pith_short_12","alias_value":"UWSYWEXBECH3","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"pith_short_16","alias_value":"UWSYWEXBECH3SVVR","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"pith_short_8","alias_value":"UWSYWEXB","created_at":"2026-07-05T02:44:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:UWSYWEXBECH3SVVRYZQB3ST3OQ","target":"record","payload":{"canonical_record":{"source":{"id":"2104.04265","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-04-09T09:24:58Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"8e18950d468b05faff48945c318949bb605fe0bd1e00be2401e606a1145073df","abstract_canon_sha256":"099c3a106018d27fb32b66ac1b9dcee26b52d3ec5c1cddf8727f6e09a224cd98"},"schema_version":"1.0"},"canonical_sha256":"a5a58b12e1208fb956b1c6601dca7b74251af5354e19b0b1b7d8a441e5abd70f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:44:57.750904Z","signature_b64":"6IaL46ghVqTW6UkpOhcn9e1OC0Myvvj3oEcK2vpoUNBfEDSJiqKS6ckWxO+fZ8rmqVjUuKOvvWs2kI3x14AOAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a5a58b12e1208fb956b1c6601dca7b74251af5354e19b0b1b7d8a441e5abd70f","last_reissued_at":"2026-07-05T02:44:57.750390Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:44:57.750390Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.04265","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":"2026-07-05T02:44:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q6OB8hnsrJgsntqNHSnMm85QXFT0bFJFsT8HAGne/BTVom5QLVxu19skRLGIGnVyu8zF5hv+oATfgxvDXeOrAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:12:50.792899Z"},"content_sha256":"79dc45250d5416212ab645e07fa06ea1dedc6a6d76c861c1a24429233feef746","schema_version":"1.0","event_id":"sha256:79dc45250d5416212ab645e07fa06ea1dedc6a6d76c861c1a24429233feef746"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:UWSYWEXBECH3SVVRYZQB3ST3OQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Chemical Tagging N-rich Field Stars with High-resolution Spectroscopy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Baitian Tang, Douglas Geisler, Hongliang Yan, J. G. Fernandez-Trincado, Jincheng Yu, M. Soto","submitted_at":"2021-04-09T09:24:58Z","abstract_excerpt":"We measure chemical abundances for over 20 elements of 15 N-rich field stars with high resolution ($R \\sim 30000$) optical spectra. We find that Na, Mg, Al, Si, and Ca abundances of our N-rich field stars are mostly consistent with those of stars from globular clusters (GCs). Seven stars are estimated to have [Al/Fe$]>0.5$, which is not found in most GC \"first generation\" stars. On the other hand, $\\alpha$ element abundances (especially Ti) could show distinguishable differences between in situ stars and accreted stars. We discover that one interesting star, with consistently low [Mg/Fe], [Si/"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.04265","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.04265/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:44:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"urqwAawc0FUodwFbuwDrLKD96bQnLNgQGZgNeL24Jm1FxtByvnPFOyvAUpA0xifc+Sff6WNhC2hReHFCxBewAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:12:50.793483Z"},"content_sha256":"c8116d12f699caf88ade8da1db99f25340468dff80cd6f9de33a41631257e42d","schema_version":"1.0","event_id":"sha256:c8116d12f699caf88ade8da1db99f25340468dff80cd6f9de33a41631257e42d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UWSYWEXBECH3SVVRYZQB3ST3OQ/bundle.json","state_url":"https://pith.science/pith/UWSYWEXBECH3SVVRYZQB3ST3OQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UWSYWEXBECH3SVVRYZQB3ST3OQ/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":"2026-07-07T11:12:50Z","links":{"resolver":"https://pith.science/pith/UWSYWEXBECH3SVVRYZQB3ST3OQ","bundle":"https://pith.science/pith/UWSYWEXBECH3SVVRYZQB3ST3OQ/bundle.json","state":"https://pith.science/pith/UWSYWEXBECH3SVVRYZQB3ST3OQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UWSYWEXBECH3SVVRYZQB3ST3OQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:UWSYWEXBECH3SVVRYZQB3ST3OQ","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":"099c3a106018d27fb32b66ac1b9dcee26b52d3ec5c1cddf8727f6e09a224cd98","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-04-09T09:24:58Z","title_canon_sha256":"8e18950d468b05faff48945c318949bb605fe0bd1e00be2401e606a1145073df"},"schema_version":"1.0","source":{"id":"2104.04265","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.04265","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"arxiv_version","alias_value":"2104.04265v1","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.04265","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"pith_short_12","alias_value":"UWSYWEXBECH3","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"pith_short_16","alias_value":"UWSYWEXBECH3SVVR","created_at":"2026-07-05T02:44:57Z"},{"alias_kind":"pith_short_8","alias_value":"UWSYWEXB","created_at":"2026-07-05T02:44:57Z"}],"graph_snapshots":[{"event_id":"sha256:c8116d12f699caf88ade8da1db99f25340468dff80cd6f9de33a41631257e42d","target":"graph","created_at":"2026-07-05T02:44:57Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.04265/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We measure chemical abundances for over 20 elements of 15 N-rich field stars with high resolution ($R \\sim 30000$) optical spectra. We find that Na, Mg, Al, Si, and Ca abundances of our N-rich field stars are mostly consistent with those of stars from globular clusters (GCs). Seven stars are estimated to have [Al/Fe$]>0.5$, which is not found in most GC \"first generation\" stars. On the other hand, $\\alpha$ element abundances (especially Ti) could show distinguishable differences between in situ stars and accreted stars. We discover that one interesting star, with consistently low [Mg/Fe], [Si/","authors_text":"Baitian Tang, Douglas Geisler, Hongliang Yan, J. G. Fernandez-Trincado, Jincheng Yu, M. Soto","cross_cats":["astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-04-09T09:24:58Z","title":"Chemical Tagging N-rich Field Stars with High-resolution Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.04265","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":"sha256:79dc45250d5416212ab645e07fa06ea1dedc6a6d76c861c1a24429233feef746","target":"record","created_at":"2026-07-05T02:44:57Z","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":"099c3a106018d27fb32b66ac1b9dcee26b52d3ec5c1cddf8727f6e09a224cd98","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-04-09T09:24:58Z","title_canon_sha256":"8e18950d468b05faff48945c318949bb605fe0bd1e00be2401e606a1145073df"},"schema_version":"1.0","source":{"id":"2104.04265","kind":"arxiv","version":1}},"canonical_sha256":"a5a58b12e1208fb956b1c6601dca7b74251af5354e19b0b1b7d8a441e5abd70f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a5a58b12e1208fb956b1c6601dca7b74251af5354e19b0b1b7d8a441e5abd70f","first_computed_at":"2026-07-05T02:44:57.750390Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:44:57.750390Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6IaL46ghVqTW6UkpOhcn9e1OC0Myvvj3oEcK2vpoUNBfEDSJiqKS6ckWxO+fZ8rmqVjUuKOvvWs2kI3x14AOAw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:44:57.750904Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.04265","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79dc45250d5416212ab645e07fa06ea1dedc6a6d76c861c1a24429233feef746","sha256:c8116d12f699caf88ade8da1db99f25340468dff80cd6f9de33a41631257e42d"],"state_sha256":"78ea61d68be257d91cec620cf65b7bb9f4b01bcc2803ac962084aed252797b44"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kaxv9gvG/hnN7Ir/m80GZCQQ4kKLjfGQc5OjWPeVRMmAXcpc+fti6MbIwKAWP38xZxW0yjZ632E/tEyG7GE6Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T11:12:50.795567Z","bundle_sha256":"c8dbc8a91ea3ba208ddd94ff4acc599c4612a3d7fceec19c67faa062f04023d7"}}