{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:RLWD4GWHONQJ4KSXM23UPXDTXM","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":"e5dc9a39d759fc0517ee4143f8a9db5a5b6a7cc2056fb0c1e2bbf8c7a6c99326","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-11-02T06:51:36Z","title_canon_sha256":"aff2b8b4e1746b82410b69bf1f1a93944e6229de4f173a5c4d8c3ea568c2c0a1"},"schema_version":"1.0","source":{"id":"astro-ph/0611042","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0611042","created_at":"2026-05-18T04:36:20Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0611042v1","created_at":"2026-05-18T04:36:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0611042","created_at":"2026-05-18T04:36:20Z"},{"alias_kind":"pith_short_12","alias_value":"RLWD4GWHONQJ","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"RLWD4GWHONQJ4KSX","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"RLWD4GWH","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:68bda601d5f2b842481c2baa9770d8842bf43829f1ed33b14a0468620af4b948","target":"graph","created_at":"2026-05-18T04:36:20Z","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 an application of Mathematical Morphology (MM) for the classification of astronomical objects, both for star/galaxy differentiation and galaxy morphology classification. We demonstrate that, for CCD images, 99.3 +/- 3.8 % of galaxies can be separated from stars using MM, with 19.4 +/- 7.9 % of the stars being misclassified. We demonstrate that, for photographic plate images, the number of galaxies correctly separated from the stars can be increased using our MM diffraction spike tool, which allows 51.0 +/- 6.0 % of the high-brightness galaxies that are inseparable in current techniq","authors_text":"Jason A. Moore, Kevin A. Pimbblet, Michael J. Drinkwater","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-11-02T06:51:36Z","title":"Mathematical Morphology: Star/Galaxy Differentiation & Galaxy Morphology Classification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0611042","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:c0770466685085a89af34b80485bc1d5940c2457af59ce43edde71aeebd8a7d2","target":"record","created_at":"2026-05-18T04:36:20Z","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":"e5dc9a39d759fc0517ee4143f8a9db5a5b6a7cc2056fb0c1e2bbf8c7a6c99326","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-11-02T06:51:36Z","title_canon_sha256":"aff2b8b4e1746b82410b69bf1f1a93944e6229de4f173a5c4d8c3ea568c2c0a1"},"schema_version":"1.0","source":{"id":"astro-ph/0611042","kind":"arxiv","version":1}},"canonical_sha256":"8aec3e1ac773609e2a5766b747dc73bb0261e3bae8af524bb2a3e0d8562d1857","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8aec3e1ac773609e2a5766b747dc73bb0261e3bae8af524bb2a3e0d8562d1857","first_computed_at":"2026-05-18T04:36:20.782586Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:36:20.782586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C3JOYMNV2HxvxJIbR5Ikjfpi+SHOBsf0FRP/kVB/TJUUUfhD2fDNQD6zfpXV7Hu1ydV1jXXlmC0pLPwKIa/HDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:36:20.783095Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0611042","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c0770466685085a89af34b80485bc1d5940c2457af59ce43edde71aeebd8a7d2","sha256:68bda601d5f2b842481c2baa9770d8842bf43829f1ed33b14a0468620af4b948"],"state_sha256":"8690191b38a46efbd515ed8226ad9b84f0b084d9bb892caab07b2f936d65ed91"}