{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:BCA3S4JHDZ6GA72WT6SEDTWBEJ","short_pith_number":"pith:BCA3S4JH","canonical_record":{"source":{"id":"1601.02450","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-11T14:03:17Z","cross_cats_sorted":[],"title_canon_sha256":"6f21ea86943e8614c07fbfacb760ab4372691e0c648cc239c0833bc56777e5ec","abstract_canon_sha256":"a69cf0ee6f70850e216687c56a0cb5aa7430630ab69296bc2a3c355e8de4c6d0"},"schema_version":"1.0"},"canonical_sha256":"0881b971271e7c607f569fa441cec1225336521eade82bb474889dc9f2fecc8f","source":{"kind":"arxiv","id":"1601.02450","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.02450","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"arxiv_version","alias_value":"1601.02450v2","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.02450","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"pith_short_12","alias_value":"BCA3S4JHDZ6G","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"BCA3S4JHDZ6GA72W","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"BCA3S4JH","created_at":"2026-05-18T12:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:BCA3S4JHDZ6GA72WT6SEDTWBEJ","target":"record","payload":{"canonical_record":{"source":{"id":"1601.02450","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-11T14:03:17Z","cross_cats_sorted":[],"title_canon_sha256":"6f21ea86943e8614c07fbfacb760ab4372691e0c648cc239c0833bc56777e5ec","abstract_canon_sha256":"a69cf0ee6f70850e216687c56a0cb5aa7430630ab69296bc2a3c355e8de4c6d0"},"schema_version":"1.0"},"canonical_sha256":"0881b971271e7c607f569fa441cec1225336521eade82bb474889dc9f2fecc8f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:05.357311Z","signature_b64":"GRBRs+gcnGseOiSyAObV7CLvD1pS9zpTtaf/6h0cKO3WdN2/5H2/Svl5esZjsZ3ZzMjqlb7a4M3QoVdX73K7Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0881b971271e7c607f569fa441cec1225336521eade82bb474889dc9f2fecc8f","last_reissued_at":"2026-05-18T01:19:05.356746Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:05.356746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.02450","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":"2026-05-18T01:19:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yDPbghquNImSzEiMQvM+ScSU8D2/NKbIGcH5indKCNb8cUM3OUL0DJEibnMwMafCOegb1BiH5RQc7wVEj6WmBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:56:17.277269Z"},"content_sha256":"93f685cdc2a59d4e4893c8acfafc529b9cbc7c4aae7910fb3b033af2beed341d","schema_version":"1.0","event_id":"sha256:93f685cdc2a59d4e4893c8acfafc529b9cbc7c4aae7910fb3b033af2beed341d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:BCA3S4JHDZ6GA72WT6SEDTWBEJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Chemical Compositions of Very Metal-Poor Stars HD 122563 and HD 140283; A View From the Infrared","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Anna Frebel, Chan Park, Christopher Sneden, Daniel T. Jaffe, Gregory N. Mace, Hee-Young Oh, Hwihyun Kim, Hye-In Lee, In-Soo Yuk, Jae Sok Oh, Kyle F. Kaplan, Melike Af\\c{s}ar, Michael D. Pavel, Soojong Pak","submitted_at":"2016-01-11T14:03:17Z","abstract_excerpt":"From high resolution (R = 45,000), high signal-to-noise (S/N > 400) spectra gathered with the Immersion Grating Infrared Spectrograph (IGRINS) in the H and K photometric bands, we have derived elemental abundances of two bright, well-known metal-poor halo stars: the red giant HD 122563 and the subgiant HD 140283. Since these stars have metallicities approaching [Fe/H] = -3, their absorption features are generally very weak. Neutral-species lines of Mg, Si, S and Ca are detectable, as well as those of the light odd-Z elements Na and Al. The derived IR-based abundances agree with those obtained "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.02450","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":"2026-05-18T01:19:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AsSVl7cAJTK73zfq33SOj9yHFEUoSQi6B1t2nbf9RYUwkr02gpStZsVQ5vhIK8lJtvHjH25zCoKZ59kYPLDXCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:56:17.277965Z"},"content_sha256":"a7595885a1d9b02ec50d59ad1060e8482e6739e903cc8eace310f634154f0eeb","schema_version":"1.0","event_id":"sha256:a7595885a1d9b02ec50d59ad1060e8482e6739e903cc8eace310f634154f0eeb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BCA3S4JHDZ6GA72WT6SEDTWBEJ/bundle.json","state_url":"https://pith.science/pith/BCA3S4JHDZ6GA72WT6SEDTWBEJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BCA3S4JHDZ6GA72WT6SEDTWBEJ/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":"2026-05-27T03:56:17Z","links":{"resolver":"https://pith.science/pith/BCA3S4JHDZ6GA72WT6SEDTWBEJ","bundle":"https://pith.science/pith/BCA3S4JHDZ6GA72WT6SEDTWBEJ/bundle.json","state":"https://pith.science/pith/BCA3S4JHDZ6GA72WT6SEDTWBEJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BCA3S4JHDZ6GA72WT6SEDTWBEJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:BCA3S4JHDZ6GA72WT6SEDTWBEJ","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":"a69cf0ee6f70850e216687c56a0cb5aa7430630ab69296bc2a3c355e8de4c6d0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-11T14:03:17Z","title_canon_sha256":"6f21ea86943e8614c07fbfacb760ab4372691e0c648cc239c0833bc56777e5ec"},"schema_version":"1.0","source":{"id":"1601.02450","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.02450","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"arxiv_version","alias_value":"1601.02450v2","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.02450","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"pith_short_12","alias_value":"BCA3S4JHDZ6G","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"BCA3S4JHDZ6GA72W","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"BCA3S4JH","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:a7595885a1d9b02ec50d59ad1060e8482e6739e903cc8eace310f634154f0eeb","target":"graph","created_at":"2026-05-18T01:19:05Z","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":"From high resolution (R = 45,000), high signal-to-noise (S/N > 400) spectra gathered with the Immersion Grating Infrared Spectrograph (IGRINS) in the H and K photometric bands, we have derived elemental abundances of two bright, well-known metal-poor halo stars: the red giant HD 122563 and the subgiant HD 140283. Since these stars have metallicities approaching [Fe/H] = -3, their absorption features are generally very weak. Neutral-species lines of Mg, Si, S and Ca are detectable, as well as those of the light odd-Z elements Na and Al. The derived IR-based abundances agree with those obtained ","authors_text":"Anna Frebel, Chan Park, Christopher Sneden, Daniel T. Jaffe, Gregory N. Mace, Hee-Young Oh, Hwihyun Kim, Hye-In Lee, In-Soo Yuk, Jae Sok Oh, Kyle F. Kaplan, Melike Af\\c{s}ar, Michael D. Pavel, Soojong Pak","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-11T14:03:17Z","title":"The Chemical Compositions of Very Metal-Poor Stars HD 122563 and HD 140283; A View From the Infrared"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.02450","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":"sha256:93f685cdc2a59d4e4893c8acfafc529b9cbc7c4aae7910fb3b033af2beed341d","target":"record","created_at":"2026-05-18T01:19:05Z","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":"a69cf0ee6f70850e216687c56a0cb5aa7430630ab69296bc2a3c355e8de4c6d0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-11T14:03:17Z","title_canon_sha256":"6f21ea86943e8614c07fbfacb760ab4372691e0c648cc239c0833bc56777e5ec"},"schema_version":"1.0","source":{"id":"1601.02450","kind":"arxiv","version":2}},"canonical_sha256":"0881b971271e7c607f569fa441cec1225336521eade82bb474889dc9f2fecc8f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0881b971271e7c607f569fa441cec1225336521eade82bb474889dc9f2fecc8f","first_computed_at":"2026-05-18T01:19:05.356746Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:05.356746Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GRBRs+gcnGseOiSyAObV7CLvD1pS9zpTtaf/6h0cKO3WdN2/5H2/Svl5esZjsZ3ZzMjqlb7a4M3QoVdX73K7Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:05.357311Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.02450","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93f685cdc2a59d4e4893c8acfafc529b9cbc7c4aae7910fb3b033af2beed341d","sha256:a7595885a1d9b02ec50d59ad1060e8482e6739e903cc8eace310f634154f0eeb"],"state_sha256":"a184eb0296ad494cced96c8ea475f3fae1f417f57dcc8dc510f679b6edb0c466"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fi3EHJXRU9EFeLTMKZAQEt57cKXzai37DstSH0T5+7bRPxbUHfO9AMwl25bsqyHJ6i13dhViNaZNWOM9oC6BAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T03:56:17.283283Z","bundle_sha256":"55e05f361e8f38597cc7293acca46cf1c960460ba47254d96e0110081507ea2f"}}