{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FNHDOHQN2TEADAAZPNUJTKZEHC","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":"d58528259feadfdf13edd45b8adab2cd227ad5a469bcf846cbf1efc737556a30","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-10-10T14:41:36Z","title_canon_sha256":"0444776d4e5ca3193aeeadf28b38a925b1f994937103391f21befb68c562db7d"},"schema_version":"1.0","source":{"id":"1310.2840","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.2840","created_at":"2026-05-18T03:10:45Z"},{"alias_kind":"arxiv_version","alias_value":"1310.2840v1","created_at":"2026-05-18T03:10:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.2840","created_at":"2026-05-18T03:10:45Z"},{"alias_kind":"pith_short_12","alias_value":"FNHDOHQN2TEA","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FNHDOHQN2TEADAAZ","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FNHDOHQN","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:d54f8a46ede5b68e4194bb1cf16a35ba7c6f86a95c0220c6c989c8a13e6943e4","target":"graph","created_at":"2026-05-18T03:10:45Z","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":"In this paper we discuss an application of machine learning based methods to the identification of candidate AGN from optical survey data and to the automatic classification of AGNs in broad classes. We applied four different machine learning algorithms, namely the Multi Layer Perceptron (MLP), trained respectively with the Conjugate Gradient, Scaled Conjugate Gradient and Quasi Newton learning rules, and the Support Vector Machines (SVM), to tackle the problem of the classification of emission line galaxies in different classes, mainly AGNs vs non-AGNs, obtained using optical photometry in pl","authors_text":"Giuseppe Longo, Massimo Brescia, Maurizio Paolillo, Raffaele D'Abrusco, Stefano Cavuoti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-10-10T14:41:36Z","title":"Photometric classification of emission line galaxies with Machine Learning methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.2840","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":"sha256:8cceeca442ec8ba7645f93c322c79a6ca910dcf17123aa3a931ca8d6da9f822d","target":"record","created_at":"2026-05-18T03:10:45Z","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":"d58528259feadfdf13edd45b8adab2cd227ad5a469bcf846cbf1efc737556a30","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-10-10T14:41:36Z","title_canon_sha256":"0444776d4e5ca3193aeeadf28b38a925b1f994937103391f21befb68c562db7d"},"schema_version":"1.0","source":{"id":"1310.2840","kind":"arxiv","version":1}},"canonical_sha256":"2b4e371e0dd4c80180197b6899ab2438b7cab611412e887b5679304789cd7656","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b4e371e0dd4c80180197b6899ab2438b7cab611412e887b5679304789cd7656","first_computed_at":"2026-05-18T03:10:45.463457Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:10:45.463457Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dYn8jYnGZZGRH9DMK5IVs5uLFkVI0gVZh0jR0O6aCh2PR+I13el3yADxPtpaumJRW2LdBfwnNI6v9ciuHfwUAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:10:45.464310Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.2840","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8cceeca442ec8ba7645f93c322c79a6ca910dcf17123aa3a931ca8d6da9f822d","sha256:d54f8a46ede5b68e4194bb1cf16a35ba7c6f86a95c0220c6c989c8a13e6943e4"],"state_sha256":"af387a19267e5570110be31dde764c4e120bac4a65301c9a8e88a330d98c36fd"}