{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FA3OR2DKH2URCAUOBAY6J5QGY5","short_pith_number":"pith:FA3OR2DK","canonical_record":{"source":{"id":"1903.03800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-09T13:25:17Z","cross_cats_sorted":[],"title_canon_sha256":"46313c865570facbf25fa7b670a8e6b75c25f8a2611499a4ecce0f1061fbbe37","abstract_canon_sha256":"ef609da51fe577dffdaf39386df587c21cbec1a4d14aedd9371a2154a5d1f212"},"schema_version":"1.0"},"canonical_sha256":"2836e8e86a3ea911028e0831e4f606c75beb06f0db2a9953e34bf07c290a19e0","source":{"kind":"arxiv","id":"1903.03800","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.03800","created_at":"2026-05-17T23:51:40Z"},{"alias_kind":"arxiv_version","alias_value":"1903.03800v1","created_at":"2026-05-17T23:51:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.03800","created_at":"2026-05-17T23:51:40Z"},{"alias_kind":"pith_short_12","alias_value":"FA3OR2DKH2UR","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FA3OR2DKH2URCAUO","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FA3OR2DK","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FA3OR2DKH2URCAUOBAY6J5QGY5","target":"record","payload":{"canonical_record":{"source":{"id":"1903.03800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-09T13:25:17Z","cross_cats_sorted":[],"title_canon_sha256":"46313c865570facbf25fa7b670a8e6b75c25f8a2611499a4ecce0f1061fbbe37","abstract_canon_sha256":"ef609da51fe577dffdaf39386df587c21cbec1a4d14aedd9371a2154a5d1f212"},"schema_version":"1.0"},"canonical_sha256":"2836e8e86a3ea911028e0831e4f606c75beb06f0db2a9953e34bf07c290a19e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:40.910132Z","signature_b64":"kGbyF3I4rtTwUI51tfrZSnEso8wGCLhPJhUord6oGKXpC5gmvazshOFUVMW+zKDFuzrZt7SN+YvHStT3+EbxCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2836e8e86a3ea911028e0831e4f606c75beb06f0db2a9953e34bf07c290a19e0","last_reissued_at":"2026-05-17T23:51:40.909532Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:40.909532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.03800","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":"2026-05-17T23:51:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3VzvIOHxS7KgrVFGwUr7nVgi8YMHYVUNa0TRgVEByXXR6v9hDaii22zT0kG4MvR8EClTe3jhqUJfPbfbwBWcAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:42:44.991898Z"},"content_sha256":"ce9589e49a0af1e409c4795a82f2d6872ed7250e7e1a264dc0e5932ad27b5dfc","schema_version":"1.0","event_id":"sha256:ce9589e49a0af1e409c4795a82f2d6872ed7250e7e1a264dc0e5932ad27b5dfc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FA3OR2DKH2URCAUOBAY6J5QGY5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The chemical compositions and evolutionary status of red giants in the open cluster NGC 6940","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"C. Sneden, G. B\\\"ocek Topcu, M. Af\\c{s}ar","submitted_at":"2019-03-09T13:25:17Z","abstract_excerpt":"We present the high resolution (R $\\approx$ 60000), high signal-to-noise (S/N $\\simeq$ 120) spectroscopic analysis of 12 red giant members of the Galactic open cluster NGC 6940. We applied Yonsei-Yale isochrones to the color-magnitude diagram, which suggested an age of 1.1 Gyr for the cluster with a turn-off mass of 2 M$_{\\odot}$. Atmospheric parameters ($T_{\\rm eff}$, $log~{\\it g}$, [Fe/H] and $\\xi_{t}$) were determined via equivalent widths of Fe I, Fe II, Ti I, and Ti II lines. Calculated mean metallicity of the cluster is $\\langle {\\rm [Fe/H]} \\rangle = 0.04\\pm0.02$. We derived abundances "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.03800","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":"2026-05-17T23:51:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TBR0YtfklSb3QKXwwzC6wWL30KbsOS81YN0hftuI3MFx8ZVDG3hvPGPBuuqZUuAnOrpuyaCeIxpy0QTq1AXFDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:42:44.992561Z"},"content_sha256":"1d2777e5afefdb40bb411b5a05fb545ed5a8e1d53864c19e12d8a117b796dedf","schema_version":"1.0","event_id":"sha256:1d2777e5afefdb40bb411b5a05fb545ed5a8e1d53864c19e12d8a117b796dedf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FA3OR2DKH2URCAUOBAY6J5QGY5/bundle.json","state_url":"https://pith.science/pith/FA3OR2DKH2URCAUOBAY6J5QGY5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FA3OR2DKH2URCAUOBAY6J5QGY5/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":"2026-06-09T05:42:44Z","links":{"resolver":"https://pith.science/pith/FA3OR2DKH2URCAUOBAY6J5QGY5","bundle":"https://pith.science/pith/FA3OR2DKH2URCAUOBAY6J5QGY5/bundle.json","state":"https://pith.science/pith/FA3OR2DKH2URCAUOBAY6J5QGY5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FA3OR2DKH2URCAUOBAY6J5QGY5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FA3OR2DKH2URCAUOBAY6J5QGY5","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":"ef609da51fe577dffdaf39386df587c21cbec1a4d14aedd9371a2154a5d1f212","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-09T13:25:17Z","title_canon_sha256":"46313c865570facbf25fa7b670a8e6b75c25f8a2611499a4ecce0f1061fbbe37"},"schema_version":"1.0","source":{"id":"1903.03800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.03800","created_at":"2026-05-17T23:51:40Z"},{"alias_kind":"arxiv_version","alias_value":"1903.03800v1","created_at":"2026-05-17T23:51:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.03800","created_at":"2026-05-17T23:51:40Z"},{"alias_kind":"pith_short_12","alias_value":"FA3OR2DKH2UR","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FA3OR2DKH2URCAUO","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FA3OR2DK","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:1d2777e5afefdb40bb411b5a05fb545ed5a8e1d53864c19e12d8a117b796dedf","target":"graph","created_at":"2026-05-17T23:51:40Z","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 present the high resolution (R $\\approx$ 60000), high signal-to-noise (S/N $\\simeq$ 120) spectroscopic analysis of 12 red giant members of the Galactic open cluster NGC 6940. We applied Yonsei-Yale isochrones to the color-magnitude diagram, which suggested an age of 1.1 Gyr for the cluster with a turn-off mass of 2 M$_{\\odot}$. Atmospheric parameters ($T_{\\rm eff}$, $log~{\\it g}$, [Fe/H] and $\\xi_{t}$) were determined via equivalent widths of Fe I, Fe II, Ti I, and Ti II lines. Calculated mean metallicity of the cluster is $\\langle {\\rm [Fe/H]} \\rangle = 0.04\\pm0.02$. We derived abundances ","authors_text":"C. Sneden, G. B\\\"ocek Topcu, M. Af\\c{s}ar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-09T13:25:17Z","title":"The chemical compositions and evolutionary status of red giants in the open cluster NGC 6940"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.03800","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:ce9589e49a0af1e409c4795a82f2d6872ed7250e7e1a264dc0e5932ad27b5dfc","target":"record","created_at":"2026-05-17T23:51:40Z","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":"ef609da51fe577dffdaf39386df587c21cbec1a4d14aedd9371a2154a5d1f212","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-09T13:25:17Z","title_canon_sha256":"46313c865570facbf25fa7b670a8e6b75c25f8a2611499a4ecce0f1061fbbe37"},"schema_version":"1.0","source":{"id":"1903.03800","kind":"arxiv","version":1}},"canonical_sha256":"2836e8e86a3ea911028e0831e4f606c75beb06f0db2a9953e34bf07c290a19e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2836e8e86a3ea911028e0831e4f606c75beb06f0db2a9953e34bf07c290a19e0","first_computed_at":"2026-05-17T23:51:40.909532Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:40.909532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kGbyF3I4rtTwUI51tfrZSnEso8wGCLhPJhUord6oGKXpC5gmvazshOFUVMW+zKDFuzrZt7SN+YvHStT3+EbxCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:40.910132Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.03800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce9589e49a0af1e409c4795a82f2d6872ed7250e7e1a264dc0e5932ad27b5dfc","sha256:1d2777e5afefdb40bb411b5a05fb545ed5a8e1d53864c19e12d8a117b796dedf"],"state_sha256":"09b67ae0c7bb36ceaf6c6a7bff4570f6d53dbfde1d6b787fa03a7334be223f69"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0AhJSWHaHtaciPsbTuOPaL7mRW+EssYqyImZ7u/lJhR83uscxjXe3SmCGTj/5GoXwqxTKFYgCX/m47x/yMBLDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T05:42:44.995954Z","bundle_sha256":"1070599d1c97cec1f6f548cd5ab74fa9fe688935d817414a61ebe180668313e1"}}