{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:MVW7KXGWL5NXJVLZKQPAKBX4HK","short_pith_number":"pith:MVW7KXGW","canonical_record":{"source":{"id":"1704.07189","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T12:53:10Z","cross_cats_sorted":[],"title_canon_sha256":"c8ef460d39f18efbe6dcf05490c0a5a9fecdf4066d51f7cf7643ef08c711885a","abstract_canon_sha256":"746b5f4cdbc373f41136af860c44287db3f599397f9d6ba621ae53f24f39447a"},"schema_version":"1.0"},"canonical_sha256":"656df55cd65f5b74d579541e0506fc3a8d6540175aa2ae1f9d5a4f44a99e41b2","source":{"kind":"arxiv","id":"1704.07189","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07189","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07189v1","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07189","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"pith_short_12","alias_value":"MVW7KXGWL5NX","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MVW7KXGWL5NXJVLZ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MVW7KXGW","created_at":"2026-05-18T12:31:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:MVW7KXGWL5NXJVLZKQPAKBX4HK","target":"record","payload":{"canonical_record":{"source":{"id":"1704.07189","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T12:53:10Z","cross_cats_sorted":[],"title_canon_sha256":"c8ef460d39f18efbe6dcf05490c0a5a9fecdf4066d51f7cf7643ef08c711885a","abstract_canon_sha256":"746b5f4cdbc373f41136af860c44287db3f599397f9d6ba621ae53f24f39447a"},"schema_version":"1.0"},"canonical_sha256":"656df55cd65f5b74d579541e0506fc3a8d6540175aa2ae1f9d5a4f44a99e41b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:25.426466Z","signature_b64":"IUXqCiKzTC+YxOLwR6M2IDzoOBG85EdNvpLvCsqKxWPCG1FsgALvjBCBFPnwAt2fh9bWSmXVTxgjDhfe/ZADCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"656df55cd65f5b74d579541e0506fc3a8d6540175aa2ae1f9d5a4f44a99e41b2","last_reissued_at":"2026-05-18T00:43:25.425774Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:25.425774Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.07189","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":"2026-05-18T00:43:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qnGEcXuhcNk637w1mn2J2kcf2Umyms8/lKKPLv7BHICiJ1XrauuklEdruvd9fanExOhi4ywU3dDHHUC0zALDDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T14:09:56.341389Z"},"content_sha256":"dd2ee621a1856102359617744b641d25e4a98081b47326cb89fe8b0cd9e12a78","schema_version":"1.0","event_id":"sha256:dd2ee621a1856102359617744b641d25e4a98081b47326cb89fe8b0cd9e12a78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:MVW7KXGWL5NXJVLZKQPAKBX4HK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Representative galaxy age-metallicity relationships","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andr\\'es E. Piatti, Antonio Aparicio, Sebasti\\'an L. Hidalgo","submitted_at":"2017-04-24T12:53:10Z","abstract_excerpt":"The ongoing surveys of galaxies and those for the next generation of telescopes will demand the execution of high-CPU consuming machine codes for recovering detailed star formation histories (SFHs) and hence age-metallicity relationships (AMRs). We present here an expeditive method which provides quick-look AMRs on the basis of representative ages and metallicities obtained from colour-magnitude diagram (CMD) analyses. We have tested its perfomance by generating synthetic CMDs for a wide variety of galaxy SFHs. The representative AMRs turn out to be reliable down to a magnitude limit with a ph"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07189","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":"2026-05-18T00:43:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VRD4fZ6VthdJS0GcbsgowsycWdMVLTnJvi1mLQ2MUcx7FRsO8fzdenoVzBsUGkB1fxsXYxD3reCWylu3CrMfDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T14:09:56.341747Z"},"content_sha256":"35469f4327c70bfb44adf57ae99d9a0728efdef6961dead91b651bba664c3658","schema_version":"1.0","event_id":"sha256:35469f4327c70bfb44adf57ae99d9a0728efdef6961dead91b651bba664c3658"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MVW7KXGWL5NXJVLZKQPAKBX4HK/bundle.json","state_url":"https://pith.science/pith/MVW7KXGWL5NXJVLZKQPAKBX4HK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MVW7KXGWL5NXJVLZKQPAKBX4HK/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":"2026-06-21T14:09:56Z","links":{"resolver":"https://pith.science/pith/MVW7KXGWL5NXJVLZKQPAKBX4HK","bundle":"https://pith.science/pith/MVW7KXGWL5NXJVLZKQPAKBX4HK/bundle.json","state":"https://pith.science/pith/MVW7KXGWL5NXJVLZKQPAKBX4HK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MVW7KXGWL5NXJVLZKQPAKBX4HK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:MVW7KXGWL5NXJVLZKQPAKBX4HK","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":"746b5f4cdbc373f41136af860c44287db3f599397f9d6ba621ae53f24f39447a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T12:53:10Z","title_canon_sha256":"c8ef460d39f18efbe6dcf05490c0a5a9fecdf4066d51f7cf7643ef08c711885a"},"schema_version":"1.0","source":{"id":"1704.07189","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07189","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07189v1","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07189","created_at":"2026-05-18T00:43:25Z"},{"alias_kind":"pith_short_12","alias_value":"MVW7KXGWL5NX","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MVW7KXGWL5NXJVLZ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MVW7KXGW","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:35469f4327c70bfb44adf57ae99d9a0728efdef6961dead91b651bba664c3658","target":"graph","created_at":"2026-05-18T00:43:25Z","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":"The ongoing surveys of galaxies and those for the next generation of telescopes will demand the execution of high-CPU consuming machine codes for recovering detailed star formation histories (SFHs) and hence age-metallicity relationships (AMRs). We present here an expeditive method which provides quick-look AMRs on the basis of representative ages and metallicities obtained from colour-magnitude diagram (CMD) analyses. We have tested its perfomance by generating synthetic CMDs for a wide variety of galaxy SFHs. The representative AMRs turn out to be reliable down to a magnitude limit with a ph","authors_text":"Andr\\'es E. Piatti, Antonio Aparicio, Sebasti\\'an L. Hidalgo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T12:53:10Z","title":"Representative galaxy age-metallicity relationships"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07189","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:dd2ee621a1856102359617744b641d25e4a98081b47326cb89fe8b0cd9e12a78","target":"record","created_at":"2026-05-18T00:43:25Z","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":"746b5f4cdbc373f41136af860c44287db3f599397f9d6ba621ae53f24f39447a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-24T12:53:10Z","title_canon_sha256":"c8ef460d39f18efbe6dcf05490c0a5a9fecdf4066d51f7cf7643ef08c711885a"},"schema_version":"1.0","source":{"id":"1704.07189","kind":"arxiv","version":1}},"canonical_sha256":"656df55cd65f5b74d579541e0506fc3a8d6540175aa2ae1f9d5a4f44a99e41b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"656df55cd65f5b74d579541e0506fc3a8d6540175aa2ae1f9d5a4f44a99e41b2","first_computed_at":"2026-05-18T00:43:25.425774Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:25.425774Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IUXqCiKzTC+YxOLwR6M2IDzoOBG85EdNvpLvCsqKxWPCG1FsgALvjBCBFPnwAt2fh9bWSmXVTxgjDhfe/ZADCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:25.426466Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.07189","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd2ee621a1856102359617744b641d25e4a98081b47326cb89fe8b0cd9e12a78","sha256:35469f4327c70bfb44adf57ae99d9a0728efdef6961dead91b651bba664c3658"],"state_sha256":"0ec54bf9804fb58f6762d6c8e03a59fed393e36d6f4124bebd31bb1399372545"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VJonaOXIGBgUPUcRW7cMgGk6UqTSbW+F8LtaYdm5BoSK1IYMqLHx/KdgAax1++Jq1iYIcGq9reaIaBQ9aP4TDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T14:09:56.343762Z","bundle_sha256":"9c658c50577afeb6ea4a1b3fc543cc5d78443813abed2af25a6bb6fc27c89a85"}}