{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:L332DF3AIEDDDOEPBW4ZXKETXQ","short_pith_number":"pith:L332DF3A","canonical_record":{"source":{"id":"astro-ph/0011234","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-12T19:19:27Z","cross_cats_sorted":[],"title_canon_sha256":"7706e1e39c2914bb2dd38dfa6269a684eaf4af9da9cb495acb0f2f1718416b96","abstract_canon_sha256":"f454dd6daf2e0a4c359be46b865324b9be87206fee130eb0b4bd645197a2ac10"},"schema_version":"1.0"},"canonical_sha256":"5ef7a19760410631b88f0db99ba893bc247faea33831845f3e647639fca4fbfa","source":{"kind":"arxiv","id":"astro-ph/0011234","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0011234","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0011234v1","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0011234","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"pith_short_12","alias_value":"L332DF3AIEDD","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"L332DF3AIEDDDOEP","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"L332DF3A","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:L332DF3AIEDDDOEPBW4ZXKETXQ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0011234","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-12T19:19:27Z","cross_cats_sorted":[],"title_canon_sha256":"7706e1e39c2914bb2dd38dfa6269a684eaf4af9da9cb495acb0f2f1718416b96","abstract_canon_sha256":"f454dd6daf2e0a4c359be46b865324b9be87206fee130eb0b4bd645197a2ac10"},"schema_version":"1.0"},"canonical_sha256":"5ef7a19760410631b88f0db99ba893bc247faea33831845f3e647639fca4fbfa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:45.298082Z","signature_b64":"yHm4ZGv1YqSHeKxZk5TJwOxZizgSJQ7INYbUo3Z0eKE4p+nOvmXep0Vi7KA42OLcVHeqgo8FI2B/XAHnC2ZZDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ef7a19760410631b88f0db99ba893bc247faea33831845f3e647639fca4fbfa","last_reissued_at":"2026-05-18T01:40:45.297384Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:45.297384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0011234","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":"2026-05-18T01:40:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q6OArW/7aky/0dt1CAXEy77BLbpT/Q+jf4TzTMtW0kA0dNTciG58lh1J4lw4vlRWNV8CzhvBohKx5vGK0ZfTBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T16:37:32.545585Z"},"content_sha256":"576bf23c0feb3eb417d27d0e4234d871e484c5d86a4acd2795223983505d8a40","schema_version":"1.0","event_id":"sha256:576bf23c0feb3eb417d27d0e4234d871e484c5d86a4acd2795223983505d8a40"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:L332DF3AIEDDDOEPBW4ZXKETXQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the dependence of spectroscopic indices of early-type galaxies on age, metallicity and velocity dispersion","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2), (2) Univ. Cat\\'olica de Chile, (3) University of Waterloo), Harald Kuntschner (1), John R. Lucey (1), Michael J. Hudson (3), Roger L. Davies(1) ((1) University of Durham, Russell J. Smith (1","submitted_at":"2000-11-12T19:19:27Z","abstract_excerpt":"We investigate the Mg-sigma and <Fe>-sigma relations in a sample of 72 early-type galaxies drawn mostly from cluster and group environments using a homogeneous data-set which is well-calibrated onto the Lick/IDS system. The small intrinsic scatter in Mg at a given sigma gives upper limits on the spread in age and metallicity of 49% and 32% respectively, if the spread is attributed to one quantity only and if the variations in age and metallicity are uncorrelated. The age/metallicity distribution as inferred from the Hbeta vs <Fe> diagnostic diagram reinforces this conclusion, as we find mostly"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0011234","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":"2026-05-18T01:40:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vgxkZSJynEspJV5wJ5VQG9zxOomqgja5gOd+gx/E2oJmEnUnpPYytQVCGun5XBk1NeSu/bsPxXN5qRNM/DNOAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T16:37:32.545934Z"},"content_sha256":"6ac68515e82928b6aa585b0f071dfb3e0661ccd14ae8404f087a3147fe60f156","schema_version":"1.0","event_id":"sha256:6ac68515e82928b6aa585b0f071dfb3e0661ccd14ae8404f087a3147fe60f156"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L332DF3AIEDDDOEPBW4ZXKETXQ/bundle.json","state_url":"https://pith.science/pith/L332DF3AIEDDDOEPBW4ZXKETXQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L332DF3AIEDDDOEPBW4ZXKETXQ/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":"2026-06-23T16:37:32Z","links":{"resolver":"https://pith.science/pith/L332DF3AIEDDDOEPBW4ZXKETXQ","bundle":"https://pith.science/pith/L332DF3AIEDDDOEPBW4ZXKETXQ/bundle.json","state":"https://pith.science/pith/L332DF3AIEDDDOEPBW4ZXKETXQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L332DF3AIEDDDOEPBW4ZXKETXQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:L332DF3AIEDDDOEPBW4ZXKETXQ","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":"f454dd6daf2e0a4c359be46b865324b9be87206fee130eb0b4bd645197a2ac10","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-12T19:19:27Z","title_canon_sha256":"7706e1e39c2914bb2dd38dfa6269a684eaf4af9da9cb495acb0f2f1718416b96"},"schema_version":"1.0","source":{"id":"astro-ph/0011234","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0011234","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0011234v1","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0011234","created_at":"2026-05-18T01:40:45Z"},{"alias_kind":"pith_short_12","alias_value":"L332DF3AIEDD","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"L332DF3AIEDDDOEP","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"L332DF3A","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:6ac68515e82928b6aa585b0f071dfb3e0661ccd14ae8404f087a3147fe60f156","target":"graph","created_at":"2026-05-18T01:40:45Z","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 investigate the Mg-sigma and <Fe>-sigma relations in a sample of 72 early-type galaxies drawn mostly from cluster and group environments using a homogeneous data-set which is well-calibrated onto the Lick/IDS system. The small intrinsic scatter in Mg at a given sigma gives upper limits on the spread in age and metallicity of 49% and 32% respectively, if the spread is attributed to one quantity only and if the variations in age and metallicity are uncorrelated. The age/metallicity distribution as inferred from the Hbeta vs <Fe> diagnostic diagram reinforces this conclusion, as we find mostly","authors_text":"2), (2) Univ. Cat\\'olica de Chile, (3) University of Waterloo), Harald Kuntschner (1), John R. Lucey (1), Michael J. Hudson (3), Roger L. Davies(1) ((1) University of Durham, Russell J. Smith (1","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-11-12T19:19:27Z","title":"On the dependence of spectroscopic indices of early-type galaxies on age, metallicity and velocity dispersion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0011234","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":"sha256:576bf23c0feb3eb417d27d0e4234d871e484c5d86a4acd2795223983505d8a40","target":"record","created_at":"2026-05-18T01:40:45Z","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":"f454dd6daf2e0a4c359be46b865324b9be87206fee130eb0b4bd645197a2ac10","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-12T19:19:27Z","title_canon_sha256":"7706e1e39c2914bb2dd38dfa6269a684eaf4af9da9cb495acb0f2f1718416b96"},"schema_version":"1.0","source":{"id":"astro-ph/0011234","kind":"arxiv","version":1}},"canonical_sha256":"5ef7a19760410631b88f0db99ba893bc247faea33831845f3e647639fca4fbfa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ef7a19760410631b88f0db99ba893bc247faea33831845f3e647639fca4fbfa","first_computed_at":"2026-05-18T01:40:45.297384Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:45.297384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yHm4ZGv1YqSHeKxZk5TJwOxZizgSJQ7INYbUo3Z0eKE4p+nOvmXep0Vi7KA42OLcVHeqgo8FI2B/XAHnC2ZZDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:45.298082Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0011234","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:576bf23c0feb3eb417d27d0e4234d871e484c5d86a4acd2795223983505d8a40","sha256:6ac68515e82928b6aa585b0f071dfb3e0661ccd14ae8404f087a3147fe60f156"],"state_sha256":"653806c2cf5ecbf9e83616ce7667055ec8df290105bf707abaf68a13c2b0f334"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UrsACnstGwnjxtH73C40wWxh8a0+wljxXGVMzEuyGMVwT0WGAXR7yDDrbD38GT6MQIMPzRfhO2ZM07qsdonYAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T16:37:32.547855Z","bundle_sha256":"ee5db28fe97fb1b0ce2159e4dba2199fdaf4dfa817bed455b750a4ac1df7ddc3"}}