{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:QPZZFWQH6ZHIOQMZQVLOYHTH6O","short_pith_number":"pith:QPZZFWQH","canonical_record":{"source":{"id":"1207.5048","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-20T20:00:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"772dc3b57eb6cc80d6ebe6608c1f71568048fe580590c251b8ec8ed8e0d5ebad","abstract_canon_sha256":"3e2340fb5d9feb51d239e2aead1dc34d11afcc89f2d5cf18808a5b7e5b214fda"},"schema_version":"1.0"},"canonical_sha256":"83f392da07f64e8741998556ec1e67f3be2025110d4fb025ea64450462dcda22","source":{"kind":"arxiv","id":"1207.5048","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5048","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5048v1","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5048","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"QPZZFWQH6ZHI","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QPZZFWQH6ZHIOQMZ","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QPZZFWQH","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:QPZZFWQH6ZHIOQMZQVLOYHTH6O","target":"record","payload":{"canonical_record":{"source":{"id":"1207.5048","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-20T20:00:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"772dc3b57eb6cc80d6ebe6608c1f71568048fe580590c251b8ec8ed8e0d5ebad","abstract_canon_sha256":"3e2340fb5d9feb51d239e2aead1dc34d11afcc89f2d5cf18808a5b7e5b214fda"},"schema_version":"1.0"},"canonical_sha256":"83f392da07f64e8741998556ec1e67f3be2025110d4fb025ea64450462dcda22","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:15.531465Z","signature_b64":"cvMuI8HZF7Yg6opYhmZidfH41evQFJwWQOMU/LBD+g+Ki0CYy38gc6tINe2yz1x+NO/EmZHj2tyyqzOn0duRAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"83f392da07f64e8741998556ec1e67f3be2025110d4fb025ea64450462dcda22","last_reissued_at":"2026-05-18T01:56:15.530954Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:15.530954Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.5048","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":"2026-05-18T01:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1+4lfwHA4njtpUW6szxZDTyMqSwnXomIygWc36rlSIE9EGn/asxgPd3/WNAFoidU6XUSbY/j9QoPh5unuzqpAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:36:02.409237Z"},"content_sha256":"3549da2e75463c4065ef6659ba5aae24612f7f24e52424d7291cf4891d62340e","schema_version":"1.0","event_id":"sha256:3549da2e75463c4065ef6659ba5aae24612f7f24e52424d7291cf4891d62340e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:QPZZFWQH6ZHIOQMZQVLOYHTH6O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Theory of Stellar Population Synthesis with an application to N-Body simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. Chiosi, D. Kawata, S. Pasetto","submitted_at":"2012-07-20T20:00:02Z","abstract_excerpt":"Aims. We present here a new theoretical approach to population synthesis. The aim is to predict colour magnitude diagrams (CMDs) for huge numbers of stars. With this method we generate synthetic CMDs for N-body simulations of galaxies. Sophisticated hydrodynamic N-body models of galaxies require equal quality simulations of the photometric properties of their stellar content. The only prerequisite for the method to work is very little information on the star formation and chemical enrichment histories, i.e. the age and metallicity of all star-particles as a function of time. The method takes i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5048","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":"2026-05-18T01:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"50EtjltNcSZU6khpdyQmo4mHRz2UG/PUfBMZ5D3YZ74Mj25h8xcgwZg7zlShg+dbRkMcpoWuhasswVSr5fj0Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:36:02.409619Z"},"content_sha256":"63b177bc8dc9a7e1ad60f52e70ea8c8dd8794cb69e8fa331bc2a3ca8950850d4","schema_version":"1.0","event_id":"sha256:63b177bc8dc9a7e1ad60f52e70ea8c8dd8794cb69e8fa331bc2a3ca8950850d4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QPZZFWQH6ZHIOQMZQVLOYHTH6O/bundle.json","state_url":"https://pith.science/pith/QPZZFWQH6ZHIOQMZQVLOYHTH6O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QPZZFWQH6ZHIOQMZQVLOYHTH6O/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":"2026-05-30T12:36:02Z","links":{"resolver":"https://pith.science/pith/QPZZFWQH6ZHIOQMZQVLOYHTH6O","bundle":"https://pith.science/pith/QPZZFWQH6ZHIOQMZQVLOYHTH6O/bundle.json","state":"https://pith.science/pith/QPZZFWQH6ZHIOQMZQVLOYHTH6O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QPZZFWQH6ZHIOQMZQVLOYHTH6O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:QPZZFWQH6ZHIOQMZQVLOYHTH6O","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":"3e2340fb5d9feb51d239e2aead1dc34d11afcc89f2d5cf18808a5b7e5b214fda","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-20T20:00:02Z","title_canon_sha256":"772dc3b57eb6cc80d6ebe6608c1f71568048fe580590c251b8ec8ed8e0d5ebad"},"schema_version":"1.0","source":{"id":"1207.5048","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5048","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5048v1","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5048","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"QPZZFWQH6ZHI","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QPZZFWQH6ZHIOQMZ","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QPZZFWQH","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:63b177bc8dc9a7e1ad60f52e70ea8c8dd8794cb69e8fa331bc2a3ca8950850d4","target":"graph","created_at":"2026-05-18T01:56:15Z","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":"Aims. We present here a new theoretical approach to population synthesis. The aim is to predict colour magnitude diagrams (CMDs) for huge numbers of stars. With this method we generate synthetic CMDs for N-body simulations of galaxies. Sophisticated hydrodynamic N-body models of galaxies require equal quality simulations of the photometric properties of their stellar content. The only prerequisite for the method to work is very little information on the star formation and chemical enrichment histories, i.e. the age and metallicity of all star-particles as a function of time. The method takes i","authors_text":"C. Chiosi, D. Kawata, S. Pasetto","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-20T20:00:02Z","title":"Theory of Stellar Population Synthesis with an application to N-Body simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5048","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":"sha256:3549da2e75463c4065ef6659ba5aae24612f7f24e52424d7291cf4891d62340e","target":"record","created_at":"2026-05-18T01:56:15Z","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":"3e2340fb5d9feb51d239e2aead1dc34d11afcc89f2d5cf18808a5b7e5b214fda","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-20T20:00:02Z","title_canon_sha256":"772dc3b57eb6cc80d6ebe6608c1f71568048fe580590c251b8ec8ed8e0d5ebad"},"schema_version":"1.0","source":{"id":"1207.5048","kind":"arxiv","version":1}},"canonical_sha256":"83f392da07f64e8741998556ec1e67f3be2025110d4fb025ea64450462dcda22","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"83f392da07f64e8741998556ec1e67f3be2025110d4fb025ea64450462dcda22","first_computed_at":"2026-05-18T01:56:15.530954Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:15.530954Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cvMuI8HZF7Yg6opYhmZidfH41evQFJwWQOMU/LBD+g+Ki0CYy38gc6tINe2yz1x+NO/EmZHj2tyyqzOn0duRAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:15.531465Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.5048","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3549da2e75463c4065ef6659ba5aae24612f7f24e52424d7291cf4891d62340e","sha256:63b177bc8dc9a7e1ad60f52e70ea8c8dd8794cb69e8fa331bc2a3ca8950850d4"],"state_sha256":"e340ac10fa19360d056ad503a75aa2c4beceb218e9ef812120e0da1a16d5ddaa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4+q0Ccu72MLnvDf1a/PhDjL2VuRqVvKZfY+9llEjGP5C4W2em5zka9xZeODqIaw5L2uJjqh4KPFxrmtMd7CnCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T12:36:02.412198Z","bundle_sha256":"cd7602dee825ab14a3ee3038148f1459e6154ed7ae4ffa6968d20d180f2bb10c"}}