{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:KXJN26V5JCLOJ5UA7KIUGF5ARY","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":"d4339d2d65cf5216f0f4565edd74a2e0e2708f37d3067b2de01fe88ac18ecad2","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-09T18:00:00Z","title_canon_sha256":"0df84e1daa88fd36dca5bfe7ee6d8468c676d374d775172704c26456c70431c5"},"schema_version":"1.0","source":{"id":"2408.05263","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.05263","created_at":"2026-07-05T08:54:17Z"},{"alias_kind":"arxiv_version","alias_value":"2408.05263v1","created_at":"2026-07-05T08:54:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.05263","created_at":"2026-07-05T08:54:17Z"},{"alias_kind":"pith_short_12","alias_value":"KXJN26V5JCLO","created_at":"2026-07-05T08:54:17Z"},{"alias_kind":"pith_short_16","alias_value":"KXJN26V5JCLOJ5UA","created_at":"2026-07-05T08:54:17Z"},{"alias_kind":"pith_short_8","alias_value":"KXJN26V5","created_at":"2026-07-05T08:54:17Z"}],"graph_snapshots":[{"event_id":"sha256:2d4509c0908c58c40d8c96da6663043eca1bb16a2478616c9f485d230d1933b5","target":"graph","created_at":"2026-07-05T08:54:17Z","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/2408.05263/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The HectoMAP spectroscopic survey provides a unique mass-limited sample of more than 35,000 quiescent galaxies ($D_n4000>1.5$) covering the redshift range $0.2<z<0.6$. We segregate galaxies in bins of properties based on stellar mass, $D_n4000$, and redshift to construct a set of high signal-to-noise spectra representing massive ($M_\\ast>10^{10}\\,M_\\odot$) quiescent population at intermediate redshift. These high-quality summed spectra enable full spectrum fitting and the related extraction of the average stellar population age and metallicity. The average galaxy age increases with the central","authors_text":"Astronomy, Canada), Department of Physics, Harvard & Smithsonian, Ivana Damjanov (Department of Astronomy, Jubee Sohn (Astronomy Program, Margaret J. Geller (Center for Astrophysics, Physics, Republic of Korea), Saint Mary's University, Seoul National University, USA)","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-09T18:00:00Z","title":"The average stellar population age and metallicity of intermediate-redshift quiescent galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.05263","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":"sha256:6425952e8382f500dbbfa2514d0dae54eee09be5e04ab9a327e11e0b9ca3dcb6","target":"record","created_at":"2026-07-05T08:54:17Z","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":"d4339d2d65cf5216f0f4565edd74a2e0e2708f37d3067b2de01fe88ac18ecad2","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-09T18:00:00Z","title_canon_sha256":"0df84e1daa88fd36dca5bfe7ee6d8468c676d374d775172704c26456c70431c5"},"schema_version":"1.0","source":{"id":"2408.05263","kind":"arxiv","version":1}},"canonical_sha256":"55d2dd7abd4896e4f680fa914317a08e28cd68ad5015ada99d0e31b6f8576ca0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"55d2dd7abd4896e4f680fa914317a08e28cd68ad5015ada99d0e31b6f8576ca0","first_computed_at":"2026-07-05T08:54:17.980662Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:54:17.980662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nx9ooCvtS3B9/xlkryO4kS+HkSjOhe57XQoFbzLlvqyb/p5yQGakqbSETtVaR0MGHdR1+00dua1zpaG4lPa1Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:54:17.981161Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.05263","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6425952e8382f500dbbfa2514d0dae54eee09be5e04ab9a327e11e0b9ca3dcb6","sha256:2d4509c0908c58c40d8c96da6663043eca1bb16a2478616c9f485d230d1933b5"],"state_sha256":"dcf2e439caeaac0118e2c2f9197f29fb34e5868af1cb4472911ae4ce59a92908"}