{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:IRCYMGC72KUIYISRGHQUBJB7OQ","short_pith_number":"pith:IRCYMGC7","canonical_record":{"source":{"id":"1805.07845","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-20T23:50:43Z","cross_cats_sorted":[],"title_canon_sha256":"4bd71ac708575793d630c00ab6f3754e52902d9212987b8b7854f0923b48ef8b","abstract_canon_sha256":"59b9e8690cf94d154519b97165374c0ec69f4bbb1df0e00dffddc5b3bd1101f7"},"schema_version":"1.0"},"canonical_sha256":"444586185fd2a88c225131e140a43f742f7c302b6729860b434635b4601d295c","source":{"kind":"arxiv","id":"1805.07845","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.07845","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"arxiv_version","alias_value":"1805.07845v1","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.07845","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"pith_short_12","alias_value":"IRCYMGC72KUI","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IRCYMGC72KUIYISR","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IRCYMGC7","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:IRCYMGC72KUIYISRGHQUBJB7OQ","target":"record","payload":{"canonical_record":{"source":{"id":"1805.07845","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-20T23:50:43Z","cross_cats_sorted":[],"title_canon_sha256":"4bd71ac708575793d630c00ab6f3754e52902d9212987b8b7854f0923b48ef8b","abstract_canon_sha256":"59b9e8690cf94d154519b97165374c0ec69f4bbb1df0e00dffddc5b3bd1101f7"},"schema_version":"1.0"},"canonical_sha256":"444586185fd2a88c225131e140a43f742f7c302b6729860b434635b4601d295c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:21.371189Z","signature_b64":"VUzaCjdwh67KKdq60aMpc9Zbal/8tOuiiPtuQiouTV7MvZZJ3zuDwEp+gIwXTG7XDg4u8wIvW4JW9lDcbilUBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"444586185fd2a88c225131e140a43f742f7c302b6729860b434635b4601d295c","last_reissued_at":"2026-05-17T23:51:21.370707Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:21.370707Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.07845","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ftb2wN0L0b71UH4PnfHQd6U4TDdhwc1VGttr1s1elVwfPn8Uyn+h1dV3AaOhCge9l3o5qf5U8qfMiXxOs8zyAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:17:33.900378Z"},"content_sha256":"be8914550560eb40c3da1039ac8f45473a0271c93e9905ab0770483560111146","schema_version":"1.0","event_id":"sha256:be8914550560eb40c3da1039ac8f45473a0271c93e9905ab0770483560111146"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:IRCYMGC72KUIYISRGHQUBJB7OQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Classifying galaxy spectra at 0.5<z<1 with self-organizing maps","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"H. Teimoorinia, P. Barmby, S. Rahmani","submitted_at":"2018-05-20T23:50:43Z","abstract_excerpt":"The spectrum of a galaxy contains information about its physical properties. Classifying spectra using templates helps elucidate the nature of a galaxy's energy sources. In this paper, we investigate the use of self-organizing maps in classifying galaxy spectra against templates. We trained semi-supervised self-organizing map networks using a set of templates covering the wavelength range from far ultraviolet to near infrared. The trained networks were used to classify the spectra of a sample of 142 galaxies with 0.5 < z < 1 and the results compared to classifications performed using K-means c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.07845","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:51:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d39DA4hxveKbbourTdo6QMrAvpYLAxx1Iqma3+tlbaueRNbmTPU4nqzzz3S6VXbS5fq8HIEWPfON0i+22IbsAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T23:17:33.901007Z"},"content_sha256":"53b1779b9155d10c143d81baee13b558196b9cbc8b6e84d5e59d3ba546b014ce","schema_version":"1.0","event_id":"sha256:53b1779b9155d10c143d81baee13b558196b9cbc8b6e84d5e59d3ba546b014ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IRCYMGC72KUIYISRGHQUBJB7OQ/bundle.json","state_url":"https://pith.science/pith/IRCYMGC72KUIYISRGHQUBJB7OQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IRCYMGC72KUIYISRGHQUBJB7OQ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-04T23:17:33Z","links":{"resolver":"https://pith.science/pith/IRCYMGC72KUIYISRGHQUBJB7OQ","bundle":"https://pith.science/pith/IRCYMGC72KUIYISRGHQUBJB7OQ/bundle.json","state":"https://pith.science/pith/IRCYMGC72KUIYISRGHQUBJB7OQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IRCYMGC72KUIYISRGHQUBJB7OQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:IRCYMGC72KUIYISRGHQUBJB7OQ","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":"59b9e8690cf94d154519b97165374c0ec69f4bbb1df0e00dffddc5b3bd1101f7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-20T23:50:43Z","title_canon_sha256":"4bd71ac708575793d630c00ab6f3754e52902d9212987b8b7854f0923b48ef8b"},"schema_version":"1.0","source":{"id":"1805.07845","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.07845","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"arxiv_version","alias_value":"1805.07845v1","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.07845","created_at":"2026-05-17T23:51:21Z"},{"alias_kind":"pith_short_12","alias_value":"IRCYMGC72KUI","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"IRCYMGC72KUIYISR","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"IRCYMGC7","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:53b1779b9155d10c143d81baee13b558196b9cbc8b6e84d5e59d3ba546b014ce","target":"graph","created_at":"2026-05-17T23:51:21Z","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":"The spectrum of a galaxy contains information about its physical properties. Classifying spectra using templates helps elucidate the nature of a galaxy's energy sources. In this paper, we investigate the use of self-organizing maps in classifying galaxy spectra against templates. We trained semi-supervised self-organizing map networks using a set of templates covering the wavelength range from far ultraviolet to near infrared. The trained networks were used to classify the spectra of a sample of 142 galaxies with 0.5 < z < 1 and the results compared to classifications performed using K-means c","authors_text":"H. Teimoorinia, P. Barmby, S. Rahmani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-20T23:50:43Z","title":"Classifying galaxy spectra at 0.5<z<1 with self-organizing maps"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.07845","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:be8914550560eb40c3da1039ac8f45473a0271c93e9905ab0770483560111146","target":"record","created_at":"2026-05-17T23:51:21Z","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":"59b9e8690cf94d154519b97165374c0ec69f4bbb1df0e00dffddc5b3bd1101f7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-20T23:50:43Z","title_canon_sha256":"4bd71ac708575793d630c00ab6f3754e52902d9212987b8b7854f0923b48ef8b"},"schema_version":"1.0","source":{"id":"1805.07845","kind":"arxiv","version":1}},"canonical_sha256":"444586185fd2a88c225131e140a43f742f7c302b6729860b434635b4601d295c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"444586185fd2a88c225131e140a43f742f7c302b6729860b434635b4601d295c","first_computed_at":"2026-05-17T23:51:21.370707Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:21.370707Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VUzaCjdwh67KKdq60aMpc9Zbal/8tOuiiPtuQiouTV7MvZZJ3zuDwEp+gIwXTG7XDg4u8wIvW4JW9lDcbilUBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:21.371189Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.07845","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:be8914550560eb40c3da1039ac8f45473a0271c93e9905ab0770483560111146","sha256:53b1779b9155d10c143d81baee13b558196b9cbc8b6e84d5e59d3ba546b014ce"],"state_sha256":"8e652e6dbb2917703ad3d2541034d93e8587b402f1601c1c9e4de227b894f973"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yc10HVMqWYXJt1IixsqKdw5Xrzmj7lHkOlF/NJxNGzNOnb7/ph5j29ml8WhHNDmffiVuahIinACp6ENAR/enBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T23:17:33.904186Z","bundle_sha256":"b8f86b3add5ba5ec368afbf80eb4ce4ad461a01e6b0206fc2c4d25383f5fa963"}}