{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:UQ23H7ZCDBENWX37YZ5GCHUAVS","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":"134193003e28846e97f0371c695d3a6dace97762ce1016fb0041f7d38defed33","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-03-24T15:00:08Z","title_canon_sha256":"df3428472e96cca8c135557c0830219ffa3c801aa6e4ec41acb1092047f0887f"},"schema_version":"1.0","source":{"id":"astro-ph/0103405","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0103405","created_at":"2026-05-18T03:57:01Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0103405v1","created_at":"2026-05-18T03:57:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0103405","created_at":"2026-05-18T03:57:01Z"},{"alias_kind":"pith_short_12","alias_value":"UQ23H7ZCDBEN","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"UQ23H7ZCDBENWX37","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"UQ23H7ZC","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:2f4412d6521945cf3d8f36cd153122d4a7ae019a098f9a83bb959c9bf97b6d76","target":"graph","created_at":"2026-05-18T03:57:01Z","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 observational evidence for a galaxy `Type' dependence to the location of a spiral galaxy's disk parameters in the mu_0-log(h) (central disk surface-brightness - disk scale-length) plane. With a sample of ~40 Low Surface Brightness galaxies (both bulge- and disk-dominated) and ~80 High Surface Brightness galaxies, the early-type disk galaxies (<=Sc) tend to define a bright envelope in the mu_0-log(h) plane, while the late-type (>=Scd) spiral galaxies have, in general, smaller and fainter disks. Below the defining surface brightness threshold for a Low Surface Brightness galaxy (i.e. ","authors_text":"Alister W. Graham, W. J. G. de Blok","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-03-24T15:00:08Z","title":"A Morphological-type dependence in the mu_0-log(h) plane of Spiral galaxy disks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0103405","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:cfe1e67e69211103f2ab507edd31efbe27dfb94e395f6711c22ad0668b5026a3","target":"record","created_at":"2026-05-18T03:57:01Z","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":"134193003e28846e97f0371c695d3a6dace97762ce1016fb0041f7d38defed33","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-03-24T15:00:08Z","title_canon_sha256":"df3428472e96cca8c135557c0830219ffa3c801aa6e4ec41acb1092047f0887f"},"schema_version":"1.0","source":{"id":"astro-ph/0103405","kind":"arxiv","version":1}},"canonical_sha256":"a435b3ff221848db5f7fc67a611e80ac8af9fdf98c85e0a3def0df07c1ba0223","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a435b3ff221848db5f7fc67a611e80ac8af9fdf98c85e0a3def0df07c1ba0223","first_computed_at":"2026-05-18T03:57:01.469493Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:57:01.469493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KQPbvnm6egJvl+5i4ljU7yJJZpBs2jZxRSq5ffHH8RTMWGUrz0t622lYuIDxrJFbPH9cA/MknBNCn8aAzR1fCA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:57:01.470440Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0103405","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfe1e67e69211103f2ab507edd31efbe27dfb94e395f6711c22ad0668b5026a3","sha256:2f4412d6521945cf3d8f36cd153122d4a7ae019a098f9a83bb959c9bf97b6d76"],"state_sha256":"0360164f752279bd75a99224c0f877e24ba9bb7fe30c394633666b582008b44d"}