{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:BAYMILQ5EXNTYMLPB5HKQTOERQ","short_pith_number":"pith:BAYMILQ5","canonical_record":{"source":{"id":"1711.05781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-15T19:58:43Z","cross_cats_sorted":[],"title_canon_sha256":"d56eac0494ccae0956cf31bd99399f05828f3b034fcd1622b8cd8a49363007d4","abstract_canon_sha256":"1fb73b5d40107a218d8f9713451174c1b37257ece8562b7c0fa0bbc2b5764ba5"},"schema_version":"1.0"},"canonical_sha256":"0830c42e1d25db3c316f0f4ea84dc48c02d96e33a08716eadf07da117177583a","source":{"kind":"arxiv","id":"1711.05781","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.05781","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"arxiv_version","alias_value":"1711.05781v1","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.05781","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"pith_short_12","alias_value":"BAYMILQ5EXNT","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"BAYMILQ5EXNTYMLP","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"BAYMILQ5","created_at":"2026-05-18T12:31:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:BAYMILQ5EXNTYMLPB5HKQTOERQ","target":"record","payload":{"canonical_record":{"source":{"id":"1711.05781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-15T19:58:43Z","cross_cats_sorted":[],"title_canon_sha256":"d56eac0494ccae0956cf31bd99399f05828f3b034fcd1622b8cd8a49363007d4","abstract_canon_sha256":"1fb73b5d40107a218d8f9713451174c1b37257ece8562b7c0fa0bbc2b5764ba5"},"schema_version":"1.0"},"canonical_sha256":"0830c42e1d25db3c316f0f4ea84dc48c02d96e33a08716eadf07da117177583a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:23.971382Z","signature_b64":"i7rD+cdsW7IUwEHdZUY9NK3CRdv7MVBxBll21bktCuEeUh1h2Jt88xwxKEEKRZLGG3fvVBS+CxVuR4AFBLWUAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0830c42e1d25db3c316f0f4ea84dc48c02d96e33a08716eadf07da117177583a","last_reissued_at":"2026-05-18T00:26:23.970686Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:23.970686Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.05781","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":"2026-05-18T00:26:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6RDvoEiF05HinONdzNWA5Jg+seBslpw6z+tveLe0Qsj1dbFhm1RVYo8c8TVq73DtAF/RGChsh1U1dLAN9GWcAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:03:54.515428Z"},"content_sha256":"ec10b4ee9917aae5f6efe5cd39592df85be72692361d51aaf930c65f2a2a0694","schema_version":"1.0","event_id":"sha256:ec10b4ee9917aae5f6efe5cd39592df85be72692361d51aaf930c65f2a2a0694"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:BAYMILQ5EXNTYMLPB5HKQTOERQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Disentangling the Galactic Halo with APOGEE: I. Chemical and Kinematical Investigation of Distinct Metal-Poor Populations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Allison M. Matthews, Andres Almeida, Baitian Tang, Carlos Allende Prieto, Christian Nitschelm, Christian R. Hayes, D. A. Garc\\'ia-Hern\\'andez, Dante Minniti, Doug Geisler, Emma Fern\\'andez-Alvar, Jennifer Sobeck, J. G. Fern\\'andez-Trincado, Katia Cunha, Leticia Carigi, Matthew Shetrone, Olga Zamora, Patricia B. Tissera, Ricardo Carrera, Richard R. Lane, Sara Lucatello, Steven R. Majewski, Timothy C. Beers, Verne V. Smith, William J. Schuster","submitted_at":"2017-11-15T19:58:43Z","abstract_excerpt":"We find two chemically distinct populations separated relatively cleanly in the [Fe/H] - [Mg/Fe] plane, but also distinguished in other chemical planes, among metal-poor stars (primarily with metallicities [Fe/H] $< -0.9$) observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) and analyzed for Data Release 13 (DR13) of the Sloan Digital Sky Survey. These two stellar populations show the most significant differences in their [X/Fe] ratios for the $\\alpha$-elements, C+N, Al, and Ni. In addition to these populations having differing chemistry, the low metallicity high-Mg "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.05781","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":"2026-05-18T00:26:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0pjPF++FUtUA+O29Rvwu/26QE4lVg6d/3qThfB2nYbD9PGWBxjnbcEcojtTrbTz9ezu6Od8xPzvFiIQ7ELcICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:03:54.516136Z"},"content_sha256":"e81beba04c129f2bdeee730c64f125d668662838f38bc80a71d239d173d19c6a","schema_version":"1.0","event_id":"sha256:e81beba04c129f2bdeee730c64f125d668662838f38bc80a71d239d173d19c6a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BAYMILQ5EXNTYMLPB5HKQTOERQ/bundle.json","state_url":"https://pith.science/pith/BAYMILQ5EXNTYMLPB5HKQTOERQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BAYMILQ5EXNTYMLPB5HKQTOERQ/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":"2026-05-25T12:03:54Z","links":{"resolver":"https://pith.science/pith/BAYMILQ5EXNTYMLPB5HKQTOERQ","bundle":"https://pith.science/pith/BAYMILQ5EXNTYMLPB5HKQTOERQ/bundle.json","state":"https://pith.science/pith/BAYMILQ5EXNTYMLPB5HKQTOERQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BAYMILQ5EXNTYMLPB5HKQTOERQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:BAYMILQ5EXNTYMLPB5HKQTOERQ","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":"1fb73b5d40107a218d8f9713451174c1b37257ece8562b7c0fa0bbc2b5764ba5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-15T19:58:43Z","title_canon_sha256":"d56eac0494ccae0956cf31bd99399f05828f3b034fcd1622b8cd8a49363007d4"},"schema_version":"1.0","source":{"id":"1711.05781","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.05781","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"arxiv_version","alias_value":"1711.05781v1","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.05781","created_at":"2026-05-18T00:26:23Z"},{"alias_kind":"pith_short_12","alias_value":"BAYMILQ5EXNT","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_16","alias_value":"BAYMILQ5EXNTYMLP","created_at":"2026-05-18T12:31:08Z"},{"alias_kind":"pith_short_8","alias_value":"BAYMILQ5","created_at":"2026-05-18T12:31:08Z"}],"graph_snapshots":[{"event_id":"sha256:e81beba04c129f2bdeee730c64f125d668662838f38bc80a71d239d173d19c6a","target":"graph","created_at":"2026-05-18T00:26:23Z","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 find two chemically distinct populations separated relatively cleanly in the [Fe/H] - [Mg/Fe] plane, but also distinguished in other chemical planes, among metal-poor stars (primarily with metallicities [Fe/H] $< -0.9$) observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) and analyzed for Data Release 13 (DR13) of the Sloan Digital Sky Survey. These two stellar populations show the most significant differences in their [X/Fe] ratios for the $\\alpha$-elements, C+N, Al, and Ni. In addition to these populations having differing chemistry, the low metallicity high-Mg ","authors_text":"Allison M. Matthews, Andres Almeida, Baitian Tang, Carlos Allende Prieto, Christian Nitschelm, Christian R. Hayes, D. A. Garc\\'ia-Hern\\'andez, Dante Minniti, Doug Geisler, Emma Fern\\'andez-Alvar, Jennifer Sobeck, J. G. Fern\\'andez-Trincado, Katia Cunha, Leticia Carigi, Matthew Shetrone, Olga Zamora, Patricia B. Tissera, Ricardo Carrera, Richard R. Lane, Sara Lucatello, Steven R. Majewski, Timothy C. Beers, Verne V. Smith, William J. Schuster","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-15T19:58:43Z","title":"Disentangling the Galactic Halo with APOGEE: I. Chemical and Kinematical Investigation of Distinct Metal-Poor Populations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.05781","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:ec10b4ee9917aae5f6efe5cd39592df85be72692361d51aaf930c65f2a2a0694","target":"record","created_at":"2026-05-18T00:26:23Z","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":"1fb73b5d40107a218d8f9713451174c1b37257ece8562b7c0fa0bbc2b5764ba5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-15T19:58:43Z","title_canon_sha256":"d56eac0494ccae0956cf31bd99399f05828f3b034fcd1622b8cd8a49363007d4"},"schema_version":"1.0","source":{"id":"1711.05781","kind":"arxiv","version":1}},"canonical_sha256":"0830c42e1d25db3c316f0f4ea84dc48c02d96e33a08716eadf07da117177583a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0830c42e1d25db3c316f0f4ea84dc48c02d96e33a08716eadf07da117177583a","first_computed_at":"2026-05-18T00:26:23.970686Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:23.970686Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i7rD+cdsW7IUwEHdZUY9NK3CRdv7MVBxBll21bktCuEeUh1h2Jt88xwxKEEKRZLGG3fvVBS+CxVuR4AFBLWUAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:23.971382Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.05781","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ec10b4ee9917aae5f6efe5cd39592df85be72692361d51aaf930c65f2a2a0694","sha256:e81beba04c129f2bdeee730c64f125d668662838f38bc80a71d239d173d19c6a"],"state_sha256":"2267347b74a1fe0291bd79d81cafb067d2d758cdaa94ebe12b4873559cc607fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qjg46Q2JxeOCyfsvSQnrn+AbZxbzNlJity2VZ37QgCmAyXBzdB7rua/xLQF0DpLybHI1aedyCH3RqNA5g5a4DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T12:03:54.520202Z","bundle_sha256":"c16d403ad0060582fb4eb95473d1050e68378dcee98a6e321340c3c57704c32e"}}