{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BRJAC4NZLLXYCSK2QC4RC35637","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":"46b0ad6cfe14f42e96425d19c01890f44a49e59579f6e6ce29d5dd5c5c02c0e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-01T13:59:06Z","title_canon_sha256":"8ab6de73fee33d8e6a1f0134f99ff1909e120c88c69f105e64fcd4b1405185b6"},"schema_version":"1.0","source":{"id":"1803.00366","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.00366","created_at":"2026-05-18T00:18:45Z"},{"alias_kind":"arxiv_version","alias_value":"1803.00366v1","created_at":"2026-05-18T00:18:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.00366","created_at":"2026-05-18T00:18:45Z"},{"alias_kind":"pith_short_12","alias_value":"BRJAC4NZLLXY","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"BRJAC4NZLLXYCSK2","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"BRJAC4NZ","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:bce3beaa9c8f4673b3f92d3f9c6a2017405b87336210e024806628285a26d330","target":"graph","created_at":"2026-05-18T00:18:45Z","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 present a catalog of nearby (z $\\leq$ 0.5) quasars with significant features of post-starburst stellar populations in their optical spectra, so-called post-starburst quasars, or PSQs. After carefully decomposing spectra from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) Quasar Catalog into quasar and host-galaxy components, we derive a sample of 208 PSQs. Their host-galaxy components have strong H\\delta\\ absorption ($\\rm EW \\geq 6 \\AA$) indicating a significant contribution of an intermediate-aged stellar population formed in a burst of star formation within the past 1 Gyr, which","authors_text":"M. Brotherton, P. Wei, Y. Gu, Y. M. Chen, Y. Shi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-01T13:59:06Z","title":"A Catalog of Post-starburst Quasars from Sloan Digital Sky Survey Data Release 7"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.00366","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:e7e80ee342baa574196d8f015ed7bd93d71f2bf4f469309889355bc0e2729590","target":"record","created_at":"2026-05-18T00:18:45Z","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":"46b0ad6cfe14f42e96425d19c01890f44a49e59579f6e6ce29d5dd5c5c02c0e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-01T13:59:06Z","title_canon_sha256":"8ab6de73fee33d8e6a1f0134f99ff1909e120c88c69f105e64fcd4b1405185b6"},"schema_version":"1.0","source":{"id":"1803.00366","kind":"arxiv","version":1}},"canonical_sha256":"0c520171b95aef81495a80b9116fbedfc434a82ae5c619d6f6a03a5a5a1a7dc5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c520171b95aef81495a80b9116fbedfc434a82ae5c619d6f6a03a5a5a1a7dc5","first_computed_at":"2026-05-18T00:18:45.650511Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:45.650511Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"upANlz8NHM8wagyY45HmPtYAgKZfRlp7b/7ucySp5koKJTkwbztJMCYYGPx5RKB5hpP02Ei1yUG0uJv4cgLnAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:45.651112Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.00366","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e7e80ee342baa574196d8f015ed7bd93d71f2bf4f469309889355bc0e2729590","sha256:bce3beaa9c8f4673b3f92d3f9c6a2017405b87336210e024806628285a26d330"],"state_sha256":"3f735ae0efb372ef42753b0a4df5337b899cdad628cd972bda3cb155f9ec3492"}