{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:QCUCVJ2ESKKTDRG3VHQF4NIG5W","short_pith_number":"pith:QCUCVJ2E","canonical_record":{"source":{"id":"astro-ph/9803219","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-03-18T21:56:36Z","cross_cats_sorted":[],"title_canon_sha256":"37f25330fc7ed093bb499fe7418c5a37fc9e68d4ca6563b2e9ee78be548dcc57","abstract_canon_sha256":"8852eaccb053e5824d4a85a56e0c2b29a2565903f26c3aaef932e860e5fcd9dc"},"schema_version":"1.0"},"canonical_sha256":"80a82aa744929531c4dba9e05e3506edbc76e3a41af71dce797d7d9ba9d0ed5d","source":{"kind":"arxiv","id":"astro-ph/9803219","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9803219","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9803219v1","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9803219","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"pith_short_12","alias_value":"QCUCVJ2ESKKT","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"QCUCVJ2ESKKTDRG3","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"QCUCVJ2E","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:QCUCVJ2ESKKTDRG3VHQF4NIG5W","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9803219","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-03-18T21:56:36Z","cross_cats_sorted":[],"title_canon_sha256":"37f25330fc7ed093bb499fe7418c5a37fc9e68d4ca6563b2e9ee78be548dcc57","abstract_canon_sha256":"8852eaccb053e5824d4a85a56e0c2b29a2565903f26c3aaef932e860e5fcd9dc"},"schema_version":"1.0"},"canonical_sha256":"80a82aa744929531c4dba9e05e3506edbc76e3a41af71dce797d7d9ba9d0ed5d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:37.731446Z","signature_b64":"amJF39ADCDra3CpCgRVZXckazL0MZhrSme8bYQToHbAav+62BWkT7e/iwZV8vAZ7dvj6iRK8Qj2bSihrgPbkBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"80a82aa744929531c4dba9e05e3506edbc76e3a41af71dce797d7d9ba9d0ed5d","last_reissued_at":"2026-05-18T01:07:37.730923Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:37.730923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9803219","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":"2026-05-18T01:07:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EKW5e8plyNHr1Q9leKk31ztaMUI8q1RQD/N1Boycsa2KedfKXg2ITn/Lv6SNWJRh5WxWtCX7Woc0d82nyDxzBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T19:06:19.850969Z"},"content_sha256":"fe96c11f623297fd293dff77d2d2183544a0b08847172311b2bd612db321fef3","schema_version":"1.0","event_id":"sha256:fe96c11f623297fd293dff77d2d2183544a0b08847172311b2bd612db321fef3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:QCUCVJ2ESKKTDRG3VHQF4NIG5W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Metallicity effects on the chromospheric activity-age relation for late-type dwarfs","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"H. J. Rocha-Pinto, W. J. Maciel (IAG/USP-Brazil)","submitted_at":"1998-03-18T21:56:36Z","abstract_excerpt":"We show that there is a relationship between the age excess, defined as the difference between the stellar isochrone and chromospheric ages, and the metallicity as measured by the index [Fe/H] for late-type dwarfs. The chromospheric age tends to be lower than the isochrone age for metal-poor stars, and the opposite occurs for metal-rich objects. We suggest that this could be an effect of neglecting the metallicity dependence of the calibrated chromospheric emission-age relation. We propose a correction to account for this dependence. We also investigate the metallicity distributions of these s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9803219","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":"2026-05-18T01:07:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6pdAGFW7RhZfbcalxpjjGmk8T8rWbudulZ2GYNeQ1p+nnAoK4CBG4aIJebXKEegP/+hgJMNQnN6sWtTt264xCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T19:06:19.851533Z"},"content_sha256":"62e09afd9a4fa8e34aaabc1d5ad3e1fb525e813ecf78fbd27c73fe8c552bb7ff","schema_version":"1.0","event_id":"sha256:62e09afd9a4fa8e34aaabc1d5ad3e1fb525e813ecf78fbd27c73fe8c552bb7ff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QCUCVJ2ESKKTDRG3VHQF4NIG5W/bundle.json","state_url":"https://pith.science/pith/QCUCVJ2ESKKTDRG3VHQF4NIG5W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QCUCVJ2ESKKTDRG3VHQF4NIG5W/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":"2026-06-10T19:06:19Z","links":{"resolver":"https://pith.science/pith/QCUCVJ2ESKKTDRG3VHQF4NIG5W","bundle":"https://pith.science/pith/QCUCVJ2ESKKTDRG3VHQF4NIG5W/bundle.json","state":"https://pith.science/pith/QCUCVJ2ESKKTDRG3VHQF4NIG5W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QCUCVJ2ESKKTDRG3VHQF4NIG5W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:QCUCVJ2ESKKTDRG3VHQF4NIG5W","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":"8852eaccb053e5824d4a85a56e0c2b29a2565903f26c3aaef932e860e5fcd9dc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-03-18T21:56:36Z","title_canon_sha256":"37f25330fc7ed093bb499fe7418c5a37fc9e68d4ca6563b2e9ee78be548dcc57"},"schema_version":"1.0","source":{"id":"astro-ph/9803219","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9803219","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9803219v1","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9803219","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"pith_short_12","alias_value":"QCUCVJ2ESKKT","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"QCUCVJ2ESKKTDRG3","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"QCUCVJ2E","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:62e09afd9a4fa8e34aaabc1d5ad3e1fb525e813ecf78fbd27c73fe8c552bb7ff","target":"graph","created_at":"2026-05-18T01:07:37Z","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 show that there is a relationship between the age excess, defined as the difference between the stellar isochrone and chromospheric ages, and the metallicity as measured by the index [Fe/H] for late-type dwarfs. The chromospheric age tends to be lower than the isochrone age for metal-poor stars, and the opposite occurs for metal-rich objects. We suggest that this could be an effect of neglecting the metallicity dependence of the calibrated chromospheric emission-age relation. We propose a correction to account for this dependence. We also investigate the metallicity distributions of these s","authors_text":"H. J. Rocha-Pinto, W. J. Maciel (IAG/USP-Brazil)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-03-18T21:56:36Z","title":"Metallicity effects on the chromospheric activity-age relation for late-type dwarfs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9803219","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:fe96c11f623297fd293dff77d2d2183544a0b08847172311b2bd612db321fef3","target":"record","created_at":"2026-05-18T01:07:37Z","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":"8852eaccb053e5824d4a85a56e0c2b29a2565903f26c3aaef932e860e5fcd9dc","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-03-18T21:56:36Z","title_canon_sha256":"37f25330fc7ed093bb499fe7418c5a37fc9e68d4ca6563b2e9ee78be548dcc57"},"schema_version":"1.0","source":{"id":"astro-ph/9803219","kind":"arxiv","version":1}},"canonical_sha256":"80a82aa744929531c4dba9e05e3506edbc76e3a41af71dce797d7d9ba9d0ed5d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"80a82aa744929531c4dba9e05e3506edbc76e3a41af71dce797d7d9ba9d0ed5d","first_computed_at":"2026-05-18T01:07:37.730923Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:37.730923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"amJF39ADCDra3CpCgRVZXckazL0MZhrSme8bYQToHbAav+62BWkT7e/iwZV8vAZ7dvj6iRK8Qj2bSihrgPbkBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:37.731446Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9803219","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fe96c11f623297fd293dff77d2d2183544a0b08847172311b2bd612db321fef3","sha256:62e09afd9a4fa8e34aaabc1d5ad3e1fb525e813ecf78fbd27c73fe8c552bb7ff"],"state_sha256":"7bd24a17c5ba7ed9045c1f5b7995e4f7a07efc798f0e5234f4bc640ee8d0f175"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fUiAcX6OTuzFv9d/Ys9XT6Snm9TgUJ06vlxbQAxUroS+jJKdSNt2sFNEQAyppPBVaJV8KM6zp25/3rKtbwmJCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T19:06:19.854173Z","bundle_sha256":"3489ece2ed1ba24d6bc2b3d33b7905736a3a4a21f70c8d7ca371ef14580f75c2"}}