{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:MAQWRHKOS62NBMFPMUT345TLQK","short_pith_number":"pith:MAQWRHKO","canonical_record":{"source":{"id":"2504.20255","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-28T20:52:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"aacbfb9ed94f30abecf74c4a7ad07f52d2366e86a6d484bf83590b44b50827dd","abstract_canon_sha256":"1a30e0c41e646e175a8aa0ac61541126e000a8477f9659e9d2dfc7bf397cd3f1"},"schema_version":"1.0"},"canonical_sha256":"6021689d4e97b4d0b0af6527be766b828d93a68641fba062d071be5a25c5f7cd","source":{"kind":"arxiv","id":"2504.20255","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.20255","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"arxiv_version","alias_value":"2504.20255v2","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.20255","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"pith_short_12","alias_value":"MAQWRHKOS62N","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"pith_short_16","alias_value":"MAQWRHKOS62NBMFP","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"pith_short_8","alias_value":"MAQWRHKO","created_at":"2026-07-05T10:56:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:MAQWRHKOS62NBMFPMUT345TLQK","target":"record","payload":{"canonical_record":{"source":{"id":"2504.20255","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-28T20:52:57Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"aacbfb9ed94f30abecf74c4a7ad07f52d2366e86a6d484bf83590b44b50827dd","abstract_canon_sha256":"1a30e0c41e646e175a8aa0ac61541126e000a8477f9659e9d2dfc7bf397cd3f1"},"schema_version":"1.0"},"canonical_sha256":"6021689d4e97b4d0b0af6527be766b828d93a68641fba062d071be5a25c5f7cd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:56:39.816025Z","signature_b64":"HUhM3hoHQPjGxgj7Xqzsqs8KD/zSN31T5G3fEWxmyLPcsl4u5ZjOjEVSd1+/V5deUXoRu3JIK5ZdPEsEMqGjDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6021689d4e97b4d0b0af6527be766b828d93a68641fba062d071be5a25c5f7cd","last_reissued_at":"2026-07-05T10:56:39.815579Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:56:39.815579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.20255","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":"2026-07-05T10:56:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3Q+wRlpcgNSUiX1z8et+FIchhVOdpKhKQKRbYu/+vh83c3II7fowj/hafY4WY2UiSH/e++5jcgPr8TbV8nRgBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T08:41:27.319627Z"},"content_sha256":"c6262127b603737dc78485411bd782a9b379fbdcb93a6c0b99a115ff428ca4d8","schema_version":"1.0","event_id":"sha256:c6262127b603737dc78485411bd782a9b379fbdcb93a6c0b99a115ff428ca4d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:MAQWRHKOS62NBMFPMUT345TLQK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Abundance Measurements of the Metal-poor M subdwarf LHS 174 Using High-resolution Optical Spectroscopy","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"David R. Coria, Kathryn V. Lester, Neda Hejazi, Sebastien Lepine, Thomas Nordlander, Wei-Chun Jao","submitted_at":"2025-04-28T20:52:57Z","abstract_excerpt":"Metal-poor M subdwarfs are among the oldest stellar populations and carry valuable information about the chemical enrichment history of the Milky Way. The measurements of chemical abundances of these stars therefore provide essential insights into the nucleosynthesis in the early stages of the Galaxy's formation. We present the detailed spectroscopic analysis of a nearby metal-poor M subdwarf, LHS 174 from its high-resolution optical spectrum, and apply our previously developed spectral fitting code, \\texttt{AutoSpecFit}, to measure the abundances of five elements:[O/H]=$-$0.519$\\pm$0.081, [Ca"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.20255","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2504.20255/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":"2026-07-05T10:56:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FG/xESQywFik1DNlQDYRtY7qkC0B15i6Z6Zv1mI79zRW4/8p1Ctvq8D7Whw0LeFaehpYViXvn3RXw8T2ABMCDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T08:41:27.320572Z"},"content_sha256":"71aede8a3db2f190e691d4685dd744d2fa8fb5a1816ba19da2074367a1b4564b","schema_version":"1.0","event_id":"sha256:71aede8a3db2f190e691d4685dd744d2fa8fb5a1816ba19da2074367a1b4564b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MAQWRHKOS62NBMFPMUT345TLQK/bundle.json","state_url":"https://pith.science/pith/MAQWRHKOS62NBMFPMUT345TLQK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MAQWRHKOS62NBMFPMUT345TLQK/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":"2026-08-17T08:41:27Z","links":{"resolver":"https://pith.science/pith/MAQWRHKOS62NBMFPMUT345TLQK","bundle":"https://pith.science/pith/MAQWRHKOS62NBMFPMUT345TLQK/bundle.json","state":"https://pith.science/pith/MAQWRHKOS62NBMFPMUT345TLQK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MAQWRHKOS62NBMFPMUT345TLQK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:MAQWRHKOS62NBMFPMUT345TLQK","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":"1a30e0c41e646e175a8aa0ac61541126e000a8477f9659e9d2dfc7bf397cd3f1","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-28T20:52:57Z","title_canon_sha256":"aacbfb9ed94f30abecf74c4a7ad07f52d2366e86a6d484bf83590b44b50827dd"},"schema_version":"1.0","source":{"id":"2504.20255","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.20255","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"arxiv_version","alias_value":"2504.20255v2","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.20255","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"pith_short_12","alias_value":"MAQWRHKOS62N","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"pith_short_16","alias_value":"MAQWRHKOS62NBMFP","created_at":"2026-07-05T10:56:39Z"},{"alias_kind":"pith_short_8","alias_value":"MAQWRHKO","created_at":"2026-07-05T10:56:39Z"}],"graph_snapshots":[{"event_id":"sha256:71aede8a3db2f190e691d4685dd744d2fa8fb5a1816ba19da2074367a1b4564b","target":"graph","created_at":"2026-07-05T10:56:39Z","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/2504.20255/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Metal-poor M subdwarfs are among the oldest stellar populations and carry valuable information about the chemical enrichment history of the Milky Way. The measurements of chemical abundances of these stars therefore provide essential insights into the nucleosynthesis in the early stages of the Galaxy's formation. We present the detailed spectroscopic analysis of a nearby metal-poor M subdwarf, LHS 174 from its high-resolution optical spectrum, and apply our previously developed spectral fitting code, \\texttt{AutoSpecFit}, to measure the abundances of five elements:[O/H]=$-$0.519$\\pm$0.081, [Ca","authors_text":"David R. Coria, Kathryn V. Lester, Neda Hejazi, Sebastien Lepine, Thomas Nordlander, Wei-Chun Jao","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-28T20:52:57Z","title":"Abundance Measurements of the Metal-poor M subdwarf LHS 174 Using High-resolution Optical Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.20255","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:c6262127b603737dc78485411bd782a9b379fbdcb93a6c0b99a115ff428ca4d8","target":"record","created_at":"2026-07-05T10:56:39Z","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":"1a30e0c41e646e175a8aa0ac61541126e000a8477f9659e9d2dfc7bf397cd3f1","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-04-28T20:52:57Z","title_canon_sha256":"aacbfb9ed94f30abecf74c4a7ad07f52d2366e86a6d484bf83590b44b50827dd"},"schema_version":"1.0","source":{"id":"2504.20255","kind":"arxiv","version":2}},"canonical_sha256":"6021689d4e97b4d0b0af6527be766b828d93a68641fba062d071be5a25c5f7cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6021689d4e97b4d0b0af6527be766b828d93a68641fba062d071be5a25c5f7cd","first_computed_at":"2026-07-05T10:56:39.815579Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:56:39.815579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HUhM3hoHQPjGxgj7Xqzsqs8KD/zSN31T5G3fEWxmyLPcsl4u5ZjOjEVSd1+/V5deUXoRu3JIK5ZdPEsEMqGjDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:56:39.816025Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.20255","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c6262127b603737dc78485411bd782a9b379fbdcb93a6c0b99a115ff428ca4d8","sha256:71aede8a3db2f190e691d4685dd744d2fa8fb5a1816ba19da2074367a1b4564b"],"state_sha256":"aa8b49906a619997672c4fde7daf40b4fe6c5b309f9a5457348dd3e6ec9b9716"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VD2S/uumbijrBypHx74KBuZKhHJrIMj16rUrddRJiUhOGN5LQIb+zjiTzOEGR4Lhvk3x9Fcyl3+cvyxvewI0DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T08:41:27.339651Z","bundle_sha256":"21d61c66b6607ddaf010bed823d8df8e5e6dd989a8f24859dfd6c9326f258ee0"}}