{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:PG6GDVKRRUJRQZR4FO3YFOIIF4","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":"690a46da6ce836accbc2901c3eb658e05d2652588941d911c867f8b137dc2ac7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-22T18:00:26Z","title_canon_sha256":"dfec45de533f0f282ab2262be2be483818effd776e63846621f3fd1ec13f1e78"},"schema_version":"1.0","source":{"id":"astro-ph/0102393","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0102393","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0102393v1","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0102393","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"pith_short_12","alias_value":"PG6GDVKRRUJR","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"pith_short_16","alias_value":"PG6GDVKRRUJRQZR4","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"pith_short_8","alias_value":"PG6GDVKR","created_at":"2026-07-04T16:22:46Z"}],"graph_snapshots":[{"event_id":"sha256:deaeedb21772cafad92af13174bea617b0d0c5682aaa0143566c8f1a7dd2e2a7","target":"graph","created_at":"2026-07-04T16:22:46Z","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/0102393/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper addresses some questions which have arisen from the use of the S\\'ersic r^{1/n} law in modelling the luminosity profiles of early type galaxies. The first issue deals with the trend between the half-light radius and the structural parameter n. We show that the correlation between these two parameters is not only real, but is a natural consequence from the previous relations found to exist between the model-independent parameters: total luminosity, effective radius and effective surface brightness. We also define a new galaxy concentration index which is largely independent of the im","authors_text":"Alister W. Graham, Ignacio Trujillo, Nicola Caon (Intituto de Astrofisica de Canarias)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-02-22T18:00:26Z","title":"On the estimation of galaxy structural parameters: the Sersic Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0102393","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:e94c650d2e959e1a9e1c15856b46fb788b723db93b9cd01bb271d26fb6ce21b8","target":"record","created_at":"2026-07-04T16:22:46Z","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":"690a46da6ce836accbc2901c3eb658e05d2652588941d911c867f8b137dc2ac7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-22T18:00:26Z","title_canon_sha256":"dfec45de533f0f282ab2262be2be483818effd776e63846621f3fd1ec13f1e78"},"schema_version":"1.0","source":{"id":"astro-ph/0102393","kind":"arxiv","version":1}},"canonical_sha256":"79bc61d5518d1318663c2bb782b9082f1984732c4416b317ec37ed1913199e2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"79bc61d5518d1318663c2bb782b9082f1984732c4416b317ec37ed1913199e2c","first_computed_at":"2026-07-04T16:22:46.171716Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:22:46.171716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JrfJM8zA6C+2pVQJFfw+I14r+qgWe0JXnA8eASD8YensBEy4M+IVBmpFyPZlIkDgUY+/kll5HnpheRo8MXZIBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:22:46.172159Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0102393","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e94c650d2e959e1a9e1c15856b46fb788b723db93b9cd01bb271d26fb6ce21b8","sha256:deaeedb21772cafad92af13174bea617b0d0c5682aaa0143566c8f1a7dd2e2a7"],"state_sha256":"2b8d992ee45ebe0cf470bbfd6942856cf9917229177a456ba2f6fcb1aa7ce777"}