{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:YZ6ZD7ESQEE4Q5SZTCF2SJWTRU","short_pith_number":"pith:YZ6ZD7ES","canonical_record":{"source":{"id":"1804.04477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-12T12:47:19Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"aff48cdb146a38029af7b21c2f423507a5c5667e3bb66804c717d0163b58b8b5","abstract_canon_sha256":"05fff81fab202686ac3ad13a198578176e29f39db952c5053d73a5b0b1d8b653"},"schema_version":"1.0"},"canonical_sha256":"c67d91fc928109c87659988ba926d38d141a96b19986b532fd41573a3ce5f1d8","source":{"kind":"arxiv","id":"1804.04477","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04477","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04477v1","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04477","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"pith_short_12","alias_value":"YZ6ZD7ESQEE4","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YZ6ZD7ESQEE4Q5SZ","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YZ6ZD7ES","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:YZ6ZD7ESQEE4Q5SZTCF2SJWTRU","target":"record","payload":{"canonical_record":{"source":{"id":"1804.04477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-12T12:47:19Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"aff48cdb146a38029af7b21c2f423507a5c5667e3bb66804c717d0163b58b8b5","abstract_canon_sha256":"05fff81fab202686ac3ad13a198578176e29f39db952c5053d73a5b0b1d8b653"},"schema_version":"1.0"},"canonical_sha256":"c67d91fc928109c87659988ba926d38d141a96b19986b532fd41573a3ce5f1d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:14.579979Z","signature_b64":"2rdSdgLThBZvr4UjPIsfpjT6UjrRJLlgoFRawUp1l+slv8X9oSBll0A8nbZvFNyjIPC5zQaB5btZLK6B3FyjAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c67d91fc928109c87659988ba926d38d141a96b19986b532fd41573a3ce5f1d8","last_reissued_at":"2026-05-18T00:15:14.579204Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:14.579204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.04477","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":"2026-05-18T00:15:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HJaom+kjmFU0mgcUb2G9oScRc+rBlFMw5Trfu4Rx3MuhsAtwJIOokPWJ+o02oOn10PsgkzLV5VCPLBF3MxbwAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:34:56.164214Z"},"content_sha256":"9338dfd7bbc8730d6d0abe4caf489267b24e57df882ce4b509dbca5912dc55c5","schema_version":"1.0","event_id":"sha256:9338dfd7bbc8730d6d0abe4caf489267b24e57df882ce4b509dbca5912dc55c5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:YZ6ZD7ESQEE4Q5SZTCF2SJWTRU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Spectroscopic Survey of Field Red Horizontal-Branch Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Christopher Sneden, Dana~I. Casetti-Dinescu, Gamze B\\\"ocek Topcu, Gizem \\c{S}ehito\\u{g}lu, Melike Af\\c{s}ar, Zeynep Bozkurt","submitted_at":"2018-04-12T12:47:19Z","abstract_excerpt":"A metallicity, chemical composition, and kinematic survey has been conducted for a sample of 340 candidate field red horizontal branch stars. High resolution, high signal-to-noise spectra were gathered with the McDonald Observatory 2.7m Tull and the Hobby-Eberly Telescope echelle spectrographs, and were used to determine effective temperatures, surface gravities, microturbulent velocities, [Fe/H] metallicities, and abundance ratios [X/Fe] for seven $\\alpha$ and Fe-group species. The derived temperatures and gravities confirm that at least half of the candidates are true RHB stars, with (averag"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04477","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":"2026-05-18T00:15:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SJyOwA6/oSwD4eaZNNiTLUNaTjx+Uy/FxSM4rUvuDujR+Jwh0FUayxZo3xR7fAQyUmENYoglHmNjOQtDnbS3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:34:56.164831Z"},"content_sha256":"e410d7023b3e3a61fe9f76a668e4f18d94f142e68c0761e1bf3e064d730fdacf","schema_version":"1.0","event_id":"sha256:e410d7023b3e3a61fe9f76a668e4f18d94f142e68c0761e1bf3e064d730fdacf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YZ6ZD7ESQEE4Q5SZTCF2SJWTRU/bundle.json","state_url":"https://pith.science/pith/YZ6ZD7ESQEE4Q5SZTCF2SJWTRU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YZ6ZD7ESQEE4Q5SZTCF2SJWTRU/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":"2026-05-26T13:34:56Z","links":{"resolver":"https://pith.science/pith/YZ6ZD7ESQEE4Q5SZTCF2SJWTRU","bundle":"https://pith.science/pith/YZ6ZD7ESQEE4Q5SZTCF2SJWTRU/bundle.json","state":"https://pith.science/pith/YZ6ZD7ESQEE4Q5SZTCF2SJWTRU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YZ6ZD7ESQEE4Q5SZTCF2SJWTRU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YZ6ZD7ESQEE4Q5SZTCF2SJWTRU","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":"05fff81fab202686ac3ad13a198578176e29f39db952c5053d73a5b0b1d8b653","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-12T12:47:19Z","title_canon_sha256":"aff48cdb146a38029af7b21c2f423507a5c5667e3bb66804c717d0163b58b8b5"},"schema_version":"1.0","source":{"id":"1804.04477","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04477","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04477v1","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04477","created_at":"2026-05-18T00:15:14Z"},{"alias_kind":"pith_short_12","alias_value":"YZ6ZD7ESQEE4","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YZ6ZD7ESQEE4Q5SZ","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YZ6ZD7ES","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:e410d7023b3e3a61fe9f76a668e4f18d94f142e68c0761e1bf3e064d730fdacf","target":"graph","created_at":"2026-05-18T00:15:14Z","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":"A metallicity, chemical composition, and kinematic survey has been conducted for a sample of 340 candidate field red horizontal branch stars. High resolution, high signal-to-noise spectra were gathered with the McDonald Observatory 2.7m Tull and the Hobby-Eberly Telescope echelle spectrographs, and were used to determine effective temperatures, surface gravities, microturbulent velocities, [Fe/H] metallicities, and abundance ratios [X/Fe] for seven $\\alpha$ and Fe-group species. The derived temperatures and gravities confirm that at least half of the candidates are true RHB stars, with (averag","authors_text":"Christopher Sneden, Dana~I. Casetti-Dinescu, Gamze B\\\"ocek Topcu, Gizem \\c{S}ehito\\u{g}lu, Melike Af\\c{s}ar, Zeynep Bozkurt","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-12T12:47:19Z","title":"A Spectroscopic Survey of Field Red Horizontal-Branch Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04477","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":"sha256:9338dfd7bbc8730d6d0abe4caf489267b24e57df882ce4b509dbca5912dc55c5","target":"record","created_at":"2026-05-18T00:15:14Z","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":"05fff81fab202686ac3ad13a198578176e29f39db952c5053d73a5b0b1d8b653","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-12T12:47:19Z","title_canon_sha256":"aff48cdb146a38029af7b21c2f423507a5c5667e3bb66804c717d0163b58b8b5"},"schema_version":"1.0","source":{"id":"1804.04477","kind":"arxiv","version":1}},"canonical_sha256":"c67d91fc928109c87659988ba926d38d141a96b19986b532fd41573a3ce5f1d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c67d91fc928109c87659988ba926d38d141a96b19986b532fd41573a3ce5f1d8","first_computed_at":"2026-05-18T00:15:14.579204Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:14.579204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2rdSdgLThBZvr4UjPIsfpjT6UjrRJLlgoFRawUp1l+slv8X9oSBll0A8nbZvFNyjIPC5zQaB5btZLK6B3FyjAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:14.579979Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.04477","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9338dfd7bbc8730d6d0abe4caf489267b24e57df882ce4b509dbca5912dc55c5","sha256:e410d7023b3e3a61fe9f76a668e4f18d94f142e68c0761e1bf3e064d730fdacf"],"state_sha256":"425789bfbc958e5a2e30101a03099cac48bb28da1ceb680ccee871ec379fd7ab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6axoPeab0hW8dyJTGwU49nJRazn+gtNkzUrcGENDzfB6IV62/7XHreQ6NJMRLhPNG+dqHb7yHUbfq9pdqk4lCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:34:56.167276Z","bundle_sha256":"a9af298a0be48d423e68ef6009f9e62d2de25ec2fe788cd30c7f25fd7081870b"}}