{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:5RYRUXC6GTFE3KUKQORLEOOQEB","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":"6513d24423e91ec29d9c2ad663e8b55e9e6f4910535f43a2e99a199a34a3beda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T20:00:01Z","title_canon_sha256":"a2a57e9b4617fdb8324f29e2b59a0b8ba4a45b05b0eb2abdfe5291b478d5f682"},"schema_version":"1.0","source":{"id":"1204.2263","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.2263","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"arxiv_version","alias_value":"1204.2263v2","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.2263","created_at":"2026-05-18T01:57:53Z"},{"alias_kind":"pith_short_12","alias_value":"5RYRUXC6GTFE","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"5RYRUXC6GTFE3KUK","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"5RYRUXC6","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:62c3970b4a840ec0dfe259dcd93ebd5c20c1daf883c113409ee50e730c479c56","target":"graph","created_at":"2026-05-18T01:57:53Z","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 compute the exponential disc scalelength for 686 disc galaxies with spectroscopic redshifts out to redshift 5.8 based on Hubble Space Telescope archival data. We compare the results with our previous measurements based on 30000 nearby galaxies from the Sloan Digital Sky Survey. Our results confirm the presence of a dominating exponential component in galaxies out to this redshift. At the highest redshifts, the disc scalelength for the brightest galaxies with absolute magnitude between -24 and -22 is up to a factor 8 smaller compared to that in the local Universe. This observed scalelength d","authors_text":"Benoit Epinat, Evanthia Hatziminaoglou, Kambiz Fathi, Michael Gatchell","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T20:00:01Z","title":"Disc scalelengths out to redshift 5.8"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.2263","kind":"arxiv","version":2},"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":"sha256:695880ccbd1ce40372cde8846a3c92bbd54574944ced19181e7f94e5bfdfa87d","target":"record","created_at":"2026-05-18T01:57:53Z","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":"6513d24423e91ec29d9c2ad663e8b55e9e6f4910535f43a2e99a199a34a3beda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-04-10T20:00:01Z","title_canon_sha256":"a2a57e9b4617fdb8324f29e2b59a0b8ba4a45b05b0eb2abdfe5291b478d5f682"},"schema_version":"1.0","source":{"id":"1204.2263","kind":"arxiv","version":2}},"canonical_sha256":"ec711a5c5e34ca4daa8a83a2b239d020596febe953e41b9b43323acd7de29ee0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec711a5c5e34ca4daa8a83a2b239d020596febe953e41b9b43323acd7de29ee0","first_computed_at":"2026-05-18T01:57:53.884899Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:53.884899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"du/plaOXPJ8TZUHwFjJ0Fq6CpXVgXrI75kwg7KjU9ALcFuZKXySMfj6S9d6fJBm1XQwyWSfiyQRsI0vnbXq/CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:53.885300Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.2263","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:695880ccbd1ce40372cde8846a3c92bbd54574944ced19181e7f94e5bfdfa87d","sha256:62c3970b4a840ec0dfe259dcd93ebd5c20c1daf883c113409ee50e730c479c56"],"state_sha256":"68c41eab40774866b997d40fae79641afc77084e1150c24dc5f600e3d1c14c2b"}