{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2FAYRDWVSJTOH6AWCW3JIWNRO3","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":"ccf0dbeaaa199e0c2e79e4a088ff8f88c8e9e3e678601687b9483ae3042d661b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-24T11:31:50Z","title_canon_sha256":"d50ac354f516ecedc55e37f2caac094cbd61896e7b7f93f5af16342f980cc95f"},"schema_version":"1.0","source":{"id":"1306.5581","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.5581","created_at":"2026-05-18T01:49:08Z"},{"alias_kind":"arxiv_version","alias_value":"1306.5581v1","created_at":"2026-05-18T01:49:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.5581","created_at":"2026-05-18T01:49:08Z"},{"alias_kind":"pith_short_12","alias_value":"2FAYRDWVSJTO","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"2FAYRDWVSJTOH6AW","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"2FAYRDWV","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:91da9a250d23fbfd41caa3488ac57afdc2db382cdcbc6b2bcb86ef20c40b9985","target":"graph","created_at":"2026-05-18T01:49:08Z","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 report on results from the analysis of a stellar mass-selected (log M*>9.0) sample of 1644 galaxies at 0.65<z<1.1 with ultra-deep (m<26.5) optical medium-band (R~50) photometry from the Survey for High-z Absorption Red and Dead Sources (SHARDS). The spectral resolution of SHARDS allows us to consistently measure the strength of the 4000 Angstrom spectral break [Dn(4000), an excellent age indicator for the stellar populations of quiescent galaxies] for all galaxies at z~0.9 down to log M*9. The Dn(4000) index cannot be resolved from broad-band photometry, and measurements from optical spectr","authors_text":"Almudena Alonso-Herrero, Antonio Cava, Antonio Hern\\'an-Caballero, Christopher J. Conselice, Emanuele Daddi, Guillermo Barro, Ignacio Ferreras, Javier Cenarro, Jes\\'us Gallego, Laurence Tresse, Nicol\\'as Cardiel, Pablo G. P\\'erez-Gonz\\'alez, Rafael Guzm\\'an","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-24T11:31:50Z","title":"SHARDS: stellar populations and star formation histories of a mass-selected sample of 0.65<z<1.1 galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.5581","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:aeaba49765522fda458123fc3607533f13a1249062330b7f1547419bbb77e6ac","target":"record","created_at":"2026-05-18T01:49:08Z","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":"ccf0dbeaaa199e0c2e79e4a088ff8f88c8e9e3e678601687b9483ae3042d661b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-24T11:31:50Z","title_canon_sha256":"d50ac354f516ecedc55e37f2caac094cbd61896e7b7f93f5af16342f980cc95f"},"schema_version":"1.0","source":{"id":"1306.5581","kind":"arxiv","version":1}},"canonical_sha256":"d141888ed59266e3f81615b69459b176df50cf88b92fd1d1321b76ce8429dfb7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d141888ed59266e3f81615b69459b176df50cf88b92fd1d1321b76ce8429dfb7","first_computed_at":"2026-05-18T01:49:08.766258Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:08.766258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RSQ97AzJXPfB0mAPlb4z5vyMyfvt/Xiy7fdjclIedxY9vqoQAfg7VnY1rM8w1SSL2gWikY7YXt1q7R1Y/MtNCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:08.766777Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.5581","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aeaba49765522fda458123fc3607533f13a1249062330b7f1547419bbb77e6ac","sha256:91da9a250d23fbfd41caa3488ac57afdc2db382cdcbc6b2bcb86ef20c40b9985"],"state_sha256":"ca31278e064a6a8f6987d6dd9ba9c1efc25caaf449880e33977616c3d6be5b0f"}