{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1993:WHDMMWYL6PZIOQN33GYOVCEMXE","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":"c2bb8beca8e39c79d6d3ad85b60c5a34e8a43c80c6f395cdbff933f2e518775f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1993-07-05T15:34:02Z","title_canon_sha256":"4321d31835884be12d686fa96c37b71fedda1054f10d714424864770ac7b81b9"},"schema_version":"1.0","source":{"id":"astro-ph/9307006","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9307006","created_at":"2026-07-04T15:55:06Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9307006v1","created_at":"2026-07-04T15:55:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9307006","created_at":"2026-07-04T15:55:06Z"},{"alias_kind":"pith_short_12","alias_value":"WHDMMWYL6PZI","created_at":"2026-07-04T15:55:06Z"},{"alias_kind":"pith_short_16","alias_value":"WHDMMWYL6PZIOQN3","created_at":"2026-07-04T15:55:06Z"},{"alias_kind":"pith_short_8","alias_value":"WHDMMWYL","created_at":"2026-07-04T15:55:06Z"}],"graph_snapshots":[{"event_id":"sha256:d5c4f1ce8c38cbf7d95a896a44b1f1b86e433d9c24e5a89582d100388ad0de4f","target":"graph","created_at":"2026-07-04T15:55:06Z","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/astro-ph/9307006/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have examined the effect of the environmental density on the arm classification of an extensive sample of spiral galaxies included in the Nearby Galaxy Catalog (Tully, 1988a). We have also explored the dependence of the arm class of a galaxy on other factors, such as its blue absolute magnitude and its disk-to-total mass ratio, inferred in the literature either from the gradient of a good galaxy rotation curve or from a photometric mass decomposition method. We have found that the arm class is strongly related to the absolute magnitude in the mid-type spirals (in the sense that grand design","authors_text":"F. Mardirossian, G. Giuricin, M. Mezzetti, P. Monaco","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1993-07-05T15:34:02Z","title":"The Local Galaxy Density and the Arm Class of Spiral Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9307006","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":"sha256:8fb36afa0bd226d6de40e550dedc47c56e9f8f55e46d5be172a4833e15237d5d","target":"record","created_at":"2026-07-04T15:55:06Z","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":"c2bb8beca8e39c79d6d3ad85b60c5a34e8a43c80c6f395cdbff933f2e518775f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1993-07-05T15:34:02Z","title_canon_sha256":"4321d31835884be12d686fa96c37b71fedda1054f10d714424864770ac7b81b9"},"schema_version":"1.0","source":{"id":"astro-ph/9307006","kind":"arxiv","version":1}},"canonical_sha256":"b1c6c65b0bf3f28741bbd9b0ea888cb90bbf3758f9d7e7c1713b468d9fdac540","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1c6c65b0bf3f28741bbd9b0ea888cb90bbf3758f9d7e7c1713b468d9fdac540","first_computed_at":"2026-07-04T15:55:06.973770Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:55:06.973770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w1aKT33u+iqrH1PVuJ/vLQQ26E5Oe7/vLa+ZBi0ceDtGMk4nSZM6k1kfRCXOn/GRvVi+n6ZZSRauwQn/MvG2Cg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:55:06.974194Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9307006","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8fb36afa0bd226d6de40e550dedc47c56e9f8f55e46d5be172a4833e15237d5d","sha256:d5c4f1ce8c38cbf7d95a896a44b1f1b86e433d9c24e5a89582d100388ad0de4f"],"state_sha256":"7131128bdc9e92331e6e121835dcd01f9678a46084382a2ed7e2e46f15b28a38"}