{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:NF2TWOEQ3O5CXRTM2RJAYH5YOB","short_pith_number":"pith:NF2TWOEQ","canonical_record":{"source":{"id":"astro-ph/0007388","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-07-26T09:14:24Z","cross_cats_sorted":[],"title_canon_sha256":"2570de43fe8dea01acb08887aa9f284fe51d30fda97534043f98ccbb329bcf54","abstract_canon_sha256":"6482cd00668a98411cf99c4754dd63d224340e82bad722872906eba0595965b6"},"schema_version":"1.0"},"canonical_sha256":"69753b3890dbba2bc66cd4520c1fb87051065add21e754388cadefd00893a9b0","source":{"kind":"arxiv","id":"astro-ph/0007388","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0007388","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0007388v1","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0007388","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"NF2TWOEQ3O5C","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"pith_short_16","alias_value":"NF2TWOEQ3O5CXRTM","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"pith_short_8","alias_value":"NF2TWOEQ","created_at":"2026-07-04T14:10:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:NF2TWOEQ3O5CXRTM2RJAYH5YOB","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0007388","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-07-26T09:14:24Z","cross_cats_sorted":[],"title_canon_sha256":"2570de43fe8dea01acb08887aa9f284fe51d30fda97534043f98ccbb329bcf54","abstract_canon_sha256":"6482cd00668a98411cf99c4754dd63d224340e82bad722872906eba0595965b6"},"schema_version":"1.0"},"canonical_sha256":"69753b3890dbba2bc66cd4520c1fb87051065add21e754388cadefd00893a9b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:10:31.813360Z","signature_b64":"9jniGW4mHP4urOyiI+rY/hnlfi6292Nt+ZGPcSzOtdlO8y+SoGFrB2+M66hFSzVXuLapPGhroroowQ5uNn4BDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"69753b3890dbba2bc66cd4520c1fb87051065add21e754388cadefd00893a9b0","last_reissued_at":"2026-07-04T14:10:31.812916Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:10:31.812916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0007388","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":"2026-07-04T14:10:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WnDvNA14zuFcTlA4+s+T4LKLzRz3g+N+vw55TLpzQx7PmUkWit6tb7evbWqYTWvinNGHXihX+AM09Ja0eBhgCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:05:42.937340Z"},"content_sha256":"e01b6ae5bd6d292879859f42a0c4ae8fe85c41b411047689b4f776a3dbad349c","schema_version":"1.0","event_id":"sha256:e01b6ae5bd6d292879859f42a0c4ae8fe85c41b411047689b4f776a3dbad349c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:NF2TWOEQ3O5CXRTM2RJAYH5YOB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolutionary tracks and isochrones for alpha-enhanced stars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2), (2) MPA Garching), Achim Weiss (2), Bernardo Salasnich (1), Cesare Chiosi (1) ((1) Dip. Astro. Padova, Leo Girardi (1","submitted_at":"2000-07-26T09:14:24Z","abstract_excerpt":"We present four large sets of evolutionary tracks for stars with initial chemical compositions [Y=0.250, Z=0.008], [Y=0.273, Z=0.019], [Y=0.320, Z=0.040] and [Y=0.390, Z=0.070] and enhancement of alpha elements with respect to the solar pattern. The major improvement with respect to previous similar calculations is that we use consistent opacities - i.e. computed with the same chemical composition as adopted in the stellar models - over the whole relevant range of temperatures. For the same initial chemical compositions [Y,Z] and otherwise identical input physics we present also new evolutiona"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0007388","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0007388/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T14:10:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YUNuXkV5yoPJfi4mksK5JxZYusKyG5EL/rqAi4hVWSwhdEST3Onji4Ym5hP+sbRKMJ+FwEPCa5iQfYdPOQhjCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T16:05:42.937832Z"},"content_sha256":"78bd1da71dfb78d4b009977a51a8789d1eefa784efe3a5754fdebdb2509a55e5","schema_version":"1.0","event_id":"sha256:78bd1da71dfb78d4b009977a51a8789d1eefa784efe3a5754fdebdb2509a55e5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NF2TWOEQ3O5CXRTM2RJAYH5YOB/bundle.json","state_url":"https://pith.science/pith/NF2TWOEQ3O5CXRTM2RJAYH5YOB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NF2TWOEQ3O5CXRTM2RJAYH5YOB/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":"2026-08-03T16:05:42Z","links":{"resolver":"https://pith.science/pith/NF2TWOEQ3O5CXRTM2RJAYH5YOB","bundle":"https://pith.science/pith/NF2TWOEQ3O5CXRTM2RJAYH5YOB/bundle.json","state":"https://pith.science/pith/NF2TWOEQ3O5CXRTM2RJAYH5YOB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NF2TWOEQ3O5CXRTM2RJAYH5YOB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:NF2TWOEQ3O5CXRTM2RJAYH5YOB","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":"6482cd00668a98411cf99c4754dd63d224340e82bad722872906eba0595965b6","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-07-26T09:14:24Z","title_canon_sha256":"2570de43fe8dea01acb08887aa9f284fe51d30fda97534043f98ccbb329bcf54"},"schema_version":"1.0","source":{"id":"astro-ph/0007388","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0007388","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0007388v1","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0007388","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"NF2TWOEQ3O5C","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"pith_short_16","alias_value":"NF2TWOEQ3O5CXRTM","created_at":"2026-07-04T14:10:31Z"},{"alias_kind":"pith_short_8","alias_value":"NF2TWOEQ","created_at":"2026-07-04T14:10:31Z"}],"graph_snapshots":[{"event_id":"sha256:78bd1da71dfb78d4b009977a51a8789d1eefa784efe3a5754fdebdb2509a55e5","target":"graph","created_at":"2026-07-04T14:10:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0007388/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present four large sets of evolutionary tracks for stars with initial chemical compositions [Y=0.250, Z=0.008], [Y=0.273, Z=0.019], [Y=0.320, Z=0.040] and [Y=0.390, Z=0.070] and enhancement of alpha elements with respect to the solar pattern. The major improvement with respect to previous similar calculations is that we use consistent opacities - i.e. computed with the same chemical composition as adopted in the stellar models - over the whole relevant range of temperatures. For the same initial chemical compositions [Y,Z] and otherwise identical input physics we present also new evolutiona","authors_text":"2), (2) MPA Garching), Achim Weiss (2), Bernardo Salasnich (1), Cesare Chiosi (1) ((1) Dip. Astro. Padova, Leo Girardi (1","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-07-26T09:14:24Z","title":"Evolutionary tracks and isochrones for alpha-enhanced stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0007388","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:e01b6ae5bd6d292879859f42a0c4ae8fe85c41b411047689b4f776a3dbad349c","target":"record","created_at":"2026-07-04T14:10:31Z","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":"6482cd00668a98411cf99c4754dd63d224340e82bad722872906eba0595965b6","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-07-26T09:14:24Z","title_canon_sha256":"2570de43fe8dea01acb08887aa9f284fe51d30fda97534043f98ccbb329bcf54"},"schema_version":"1.0","source":{"id":"astro-ph/0007388","kind":"arxiv","version":1}},"canonical_sha256":"69753b3890dbba2bc66cd4520c1fb87051065add21e754388cadefd00893a9b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"69753b3890dbba2bc66cd4520c1fb87051065add21e754388cadefd00893a9b0","first_computed_at":"2026-07-04T14:10:31.812916Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:10:31.812916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9jniGW4mHP4urOyiI+rY/hnlfi6292Nt+ZGPcSzOtdlO8y+SoGFrB2+M66hFSzVXuLapPGhroroowQ5uNn4BDg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:10:31.813360Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0007388","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e01b6ae5bd6d292879859f42a0c4ae8fe85c41b411047689b4f776a3dbad349c","sha256:78bd1da71dfb78d4b009977a51a8789d1eefa784efe3a5754fdebdb2509a55e5"],"state_sha256":"5810f406e3ba348bca97af4f0fc46b9a7c96fd2901e3b1958442d75666d5d448"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pnCC8sxiCgJ9kCt9Q8G7SlIbJZcqAqEa+3x55eNajBjSN4nPj/NeAn/eWVLWN+5e5GlJZRfOWFT1RtRUxmkeCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T16:05:42.941430Z","bundle_sha256":"2705cc83d3fa57178debf5c0672e09d0d9e77dc0de5c729a8de0b860b0052e08"}}