{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:K5AFI3UNTCFSF67LHSDC2AZUYE","short_pith_number":"pith:K5AFI3UN","canonical_record":{"source":{"id":"1006.3985","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-06-21T04:45:58Z","cross_cats_sorted":[],"title_canon_sha256":"1a298590e33db73adb8b36c865670e2c079d2a220b6a39983009a52774d3ab49","abstract_canon_sha256":"23b549407a08c3f76fcc6f429f0ab3d093fd23b74773017dbebbe8f1ec5fbacd"},"schema_version":"1.0"},"canonical_sha256":"5740546e8d988b22fbeb3c862d0334c12bb649283a480dd6b6a40c2a005ff136","source":{"kind":"arxiv","id":"1006.3985","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.3985","created_at":"2026-05-18T02:06:44Z"},{"alias_kind":"arxiv_version","alias_value":"1006.3985v2","created_at":"2026-05-18T02:06:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.3985","created_at":"2026-05-18T02:06:44Z"},{"alias_kind":"pith_short_12","alias_value":"K5AFI3UNTCFS","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"K5AFI3UNTCFSF67L","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"K5AFI3UN","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:K5AFI3UNTCFSF67LHSDC2AZUYE","target":"record","payload":{"canonical_record":{"source":{"id":"1006.3985","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-06-21T04:45:58Z","cross_cats_sorted":[],"title_canon_sha256":"1a298590e33db73adb8b36c865670e2c079d2a220b6a39983009a52774d3ab49","abstract_canon_sha256":"23b549407a08c3f76fcc6f429f0ab3d093fd23b74773017dbebbe8f1ec5fbacd"},"schema_version":"1.0"},"canonical_sha256":"5740546e8d988b22fbeb3c862d0334c12bb649283a480dd6b6a40c2a005ff136","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:44.218670Z","signature_b64":"AOQigb4ZmEtNU4JdG6ECcQp9lFN5Tif/O5SVk5orv3kM6Pjg3aazOcd7jfXXrwNgL3+0Qx+wIuotZLHO3TEyAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5740546e8d988b22fbeb3c862d0334c12bb649283a480dd6b6a40c2a005ff136","last_reissued_at":"2026-05-18T02:06:44.218295Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:44.218295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1006.3985","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":"2026-05-18T02:06:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1Xq5s2ppEMoQeEiT79s/X2aYo0D13CzQawvL9AMdqL6Uaobt5Am0mY2ydwQm1J2QcjkhlNWOIJeZAmYpB1OzDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:06:47.051816Z"},"content_sha256":"124bd5f14e38c5bb7bbc6d277ff32d5ac8c773c2e0e4549d9871196d7024a627","schema_version":"1.0","event_id":"sha256:124bd5f14e38c5bb7bbc6d277ff32d5ac8c773c2e0e4549d9871196d7024a627"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:K5AFI3UNTCFSF67LHSDC2AZUYE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The stellar content of the Hamburg/ESO survey VI. The metallicity distribution of main-sequence turnoff stars in the Galactic halo","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Frebel, D. Yong, G. Zhao, H. N. Li, J. E. Norris, M. S. Bessell, N. Christlieb, T. C. Beers, T. Sch\\\"orck, Y. S. Lee","submitted_at":"2010-06-21T04:45:58Z","abstract_excerpt":"We determine the metallicity distribution function (MDF) of the Galactic halo based on metal-poor main-sequence turnoff-stars (MSTO) which were selected from the Hamburg/ESO objective-prism survey (HES) database. Corresponding follow-up moderateresolution observations (R ~ 2000) of some 682 stars (among which 617 were accepted program stars) were carried out with the 2.3m telescope at the Siding Spring Observatory (SSO). Corrections for the survey volume covered by the sample stars were quantitatively estimated and applied to the observed MDF. The corrections are quite small, when compared wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.3985","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":"2026-05-18T02:06:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RSWcmIHYNGYGqktJ+4ceMbo/JtJ8IGQcIxDe7LoHl900KZ+5SESS9LtbnWF2buS4UQCzi9K42FGafE+8Hh1ZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:06:47.052164Z"},"content_sha256":"4b0e4c937d2a0f830d8fe0f9d199b946d73d81b3dfd3fb42d215a0a1b49abddc","schema_version":"1.0","event_id":"sha256:4b0e4c937d2a0f830d8fe0f9d199b946d73d81b3dfd3fb42d215a0a1b49abddc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K5AFI3UNTCFSF67LHSDC2AZUYE/bundle.json","state_url":"https://pith.science/pith/K5AFI3UNTCFSF67LHSDC2AZUYE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K5AFI3UNTCFSF67LHSDC2AZUYE/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":"2026-06-02T23:06:47Z","links":{"resolver":"https://pith.science/pith/K5AFI3UNTCFSF67LHSDC2AZUYE","bundle":"https://pith.science/pith/K5AFI3UNTCFSF67LHSDC2AZUYE/bundle.json","state":"https://pith.science/pith/K5AFI3UNTCFSF67LHSDC2AZUYE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K5AFI3UNTCFSF67LHSDC2AZUYE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:K5AFI3UNTCFSF67LHSDC2AZUYE","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":"23b549407a08c3f76fcc6f429f0ab3d093fd23b74773017dbebbe8f1ec5fbacd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-06-21T04:45:58Z","title_canon_sha256":"1a298590e33db73adb8b36c865670e2c079d2a220b6a39983009a52774d3ab49"},"schema_version":"1.0","source":{"id":"1006.3985","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.3985","created_at":"2026-05-18T02:06:44Z"},{"alias_kind":"arxiv_version","alias_value":"1006.3985v2","created_at":"2026-05-18T02:06:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.3985","created_at":"2026-05-18T02:06:44Z"},{"alias_kind":"pith_short_12","alias_value":"K5AFI3UNTCFS","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"K5AFI3UNTCFSF67L","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"K5AFI3UN","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:4b0e4c937d2a0f830d8fe0f9d199b946d73d81b3dfd3fb42d215a0a1b49abddc","target":"graph","created_at":"2026-05-18T02:06:44Z","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 determine the metallicity distribution function (MDF) of the Galactic halo based on metal-poor main-sequence turnoff-stars (MSTO) which were selected from the Hamburg/ESO objective-prism survey (HES) database. Corresponding follow-up moderateresolution observations (R ~ 2000) of some 682 stars (among which 617 were accepted program stars) were carried out with the 2.3m telescope at the Siding Spring Observatory (SSO). Corrections for the survey volume covered by the sample stars were quantitatively estimated and applied to the observed MDF. The corrections are quite small, when compared wit","authors_text":"A. Frebel, D. Yong, G. Zhao, H. N. Li, J. E. Norris, M. S. Bessell, N. Christlieb, T. C. Beers, T. Sch\\\"orck, Y. S. Lee","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-06-21T04:45:58Z","title":"The stellar content of the Hamburg/ESO survey VI. The metallicity distribution of main-sequence turnoff stars in the Galactic halo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.3985","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":"sha256:124bd5f14e38c5bb7bbc6d277ff32d5ac8c773c2e0e4549d9871196d7024a627","target":"record","created_at":"2026-05-18T02:06:44Z","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":"23b549407a08c3f76fcc6f429f0ab3d093fd23b74773017dbebbe8f1ec5fbacd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-06-21T04:45:58Z","title_canon_sha256":"1a298590e33db73adb8b36c865670e2c079d2a220b6a39983009a52774d3ab49"},"schema_version":"1.0","source":{"id":"1006.3985","kind":"arxiv","version":2}},"canonical_sha256":"5740546e8d988b22fbeb3c862d0334c12bb649283a480dd6b6a40c2a005ff136","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5740546e8d988b22fbeb3c862d0334c12bb649283a480dd6b6a40c2a005ff136","first_computed_at":"2026-05-18T02:06:44.218295Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:06:44.218295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AOQigb4ZmEtNU4JdG6ECcQp9lFN5Tif/O5SVk5orv3kM6Pjg3aazOcd7jfXXrwNgL3+0Qx+wIuotZLHO3TEyAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:06:44.218670Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.3985","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:124bd5f14e38c5bb7bbc6d277ff32d5ac8c773c2e0e4549d9871196d7024a627","sha256:4b0e4c937d2a0f830d8fe0f9d199b946d73d81b3dfd3fb42d215a0a1b49abddc"],"state_sha256":"865f6b9dd538d2ed7d90ae777bcebf3c7dcd32ac67448103c2d704a4655eb016"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3ZcpJNmokxqO00fnR7CNUJ7CHi81wbzcd5KRv8Uev34mYhCrhOHq+Hy1Y5vagPWEydV2IO8muRQvMA/gV8PzCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:06:47.054218Z","bundle_sha256":"24d5608b7be7f13a5c58db7935790681645bd54072d69291d9e51d5f60cff48f"}}