{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:NKNSX2FR6EPUTVUQDV4USNRFYI","short_pith_number":"pith:NKNSX2FR","canonical_record":{"source":{"id":"2306.00669","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-01T13:39:56Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"627667414abf0365c52633076db644a97c4be4e015a9938f572626f0638b1450","abstract_canon_sha256":"bd623b6775186382ce0d59f680b86a7df7d98dd9398567d768ae3aada9f1b54e"},"schema_version":"1.0"},"canonical_sha256":"6a9b2be8b1f11f49d6901d79493625c22e8bbbc1281900de4e625c89abde787e","source":{"kind":"arxiv","id":"2306.00669","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.00669","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"arxiv_version","alias_value":"2306.00669v1","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.00669","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"pith_short_12","alias_value":"NKNSX2FR6EPU","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"pith_short_16","alias_value":"NKNSX2FR6EPUTVUQ","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"pith_short_8","alias_value":"NKNSX2FR","created_at":"2026-07-05T06:32:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:NKNSX2FR6EPUTVUQDV4USNRFYI","target":"record","payload":{"canonical_record":{"source":{"id":"2306.00669","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-01T13:39:56Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"627667414abf0365c52633076db644a97c4be4e015a9938f572626f0638b1450","abstract_canon_sha256":"bd623b6775186382ce0d59f680b86a7df7d98dd9398567d768ae3aada9f1b54e"},"schema_version":"1.0"},"canonical_sha256":"6a9b2be8b1f11f49d6901d79493625c22e8bbbc1281900de4e625c89abde787e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:32:29.080531Z","signature_b64":"Gfm/cZY/o/zcm3fcdXyevITdImq8zuHXcluw+9j3G9BFLuoY4/tYPYB1FvqdA9yFExFF9zrH8IvxaQWlfY/iDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a9b2be8b1f11f49d6901d79493625c22e8bbbc1281900de4e625c89abde787e","last_reissued_at":"2026-07-05T06:32:29.078645Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:32:29.078645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2306.00669","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":"2026-07-05T06:32:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d1OLc8yxhjGS8S12QPwfdpfnTZjbrVlGvOP7BuFCEDId/76Mu9ylvN0JiQvdDl5EBzoKVWBVl4TD/NrK6M1NDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T16:13:01.938866Z"},"content_sha256":"19128771d2435ac42d86526544e7d738bbb309073117e26759a07f6a4e2f1f5b","schema_version":"1.0","event_id":"sha256:19128771d2435ac42d86526544e7d738bbb309073117e26759a07f6a4e2f1f5b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:NKNSX2FR6EPUTVUQDV4USNRFYI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Long-term optical spectral monitoring of a changing-look active galactic nucleus NGC 3516 -- II. Broad-line profile variability","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Alexander Burenkov, Andjelka B. Kovacevi\\'c, Dragana Ili\\'c, Elena Shablovinskaya, Evencio G. Mediavilla, Jelena Kovacevi\\'c - Dojcinovi\\'c, Jian-Min Wang, Luka C. Popovi\\'c, Paola Marziani, Sladjana Marceta-Mandi\\'c, Vahram Chavushyan, Victor Manuel Pati\\~no \\'Alvarez, Yan-Rong Li","submitted_at":"2023-06-01T13:39:56Z","abstract_excerpt":"We analyze the broad H$\\beta$ line profile variability of the \"changing look\" active galactic nucleus (CL-AGN) NGC 3516 over a long period of 25 years. The observed change in the broad line profile may indicate a change in the geometry of the broad line region (BLR). Using spectral line profiles, we aim to explore changes in the kinematics and dimensions of the BLR in NGC 3516. We consider two possible scenarios, i.e. changes in the broad-line emission are caused by a decrease of ionization continuum emission or by the BLR obscuration by outer dusty regions. With this investigation we aim to c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.00669","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2306.00669/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T06:32:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wmf9uLRrWZWW+EXNRgR7w4Re2OUcfCp+Xmuq7J4pVqU71xFIr7N8fzjGEXo1tLDpoGIfjwmsNjinxGkFgXJNDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T16:13:01.940119Z"},"content_sha256":"7f5b33b3be0a86e36b852879dbae0a335060c31e279a40033dfc60ffb438f5ac","schema_version":"1.0","event_id":"sha256:7f5b33b3be0a86e36b852879dbae0a335060c31e279a40033dfc60ffb438f5ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NKNSX2FR6EPUTVUQDV4USNRFYI/bundle.json","state_url":"https://pith.science/pith/NKNSX2FR6EPUTVUQDV4USNRFYI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NKNSX2FR6EPUTVUQDV4USNRFYI/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":"2026-08-11T16:13:01Z","links":{"resolver":"https://pith.science/pith/NKNSX2FR6EPUTVUQDV4USNRFYI","bundle":"https://pith.science/pith/NKNSX2FR6EPUTVUQDV4USNRFYI/bundle.json","state":"https://pith.science/pith/NKNSX2FR6EPUTVUQDV4USNRFYI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NKNSX2FR6EPUTVUQDV4USNRFYI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:NKNSX2FR6EPUTVUQDV4USNRFYI","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":"bd623b6775186382ce0d59f680b86a7df7d98dd9398567d768ae3aada9f1b54e","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-01T13:39:56Z","title_canon_sha256":"627667414abf0365c52633076db644a97c4be4e015a9938f572626f0638b1450"},"schema_version":"1.0","source":{"id":"2306.00669","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.00669","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"arxiv_version","alias_value":"2306.00669v1","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.00669","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"pith_short_12","alias_value":"NKNSX2FR6EPU","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"pith_short_16","alias_value":"NKNSX2FR6EPUTVUQ","created_at":"2026-07-05T06:32:29Z"},{"alias_kind":"pith_short_8","alias_value":"NKNSX2FR","created_at":"2026-07-05T06:32:29Z"}],"graph_snapshots":[{"event_id":"sha256:7f5b33b3be0a86e36b852879dbae0a335060c31e279a40033dfc60ffb438f5ac","target":"graph","created_at":"2026-07-05T06:32:29Z","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/2306.00669/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We analyze the broad H$\\beta$ line profile variability of the \"changing look\" active galactic nucleus (CL-AGN) NGC 3516 over a long period of 25 years. The observed change in the broad line profile may indicate a change in the geometry of the broad line region (BLR). Using spectral line profiles, we aim to explore changes in the kinematics and dimensions of the BLR in NGC 3516. We consider two possible scenarios, i.e. changes in the broad-line emission are caused by a decrease of ionization continuum emission or by the BLR obscuration by outer dusty regions. With this investigation we aim to c","authors_text":"Alexander Burenkov, Andjelka B. Kovacevi\\'c, Dragana Ili\\'c, Elena Shablovinskaya, Evencio G. Mediavilla, Jelena Kovacevi\\'c - Dojcinovi\\'c, Jian-Min Wang, Luka C. Popovi\\'c, Paola Marziani, Sladjana Marceta-Mandi\\'c, Vahram Chavushyan, Victor Manuel Pati\\~no \\'Alvarez, Yan-Rong Li","cross_cats":["astro-ph.CO"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-01T13:39:56Z","title":"Long-term optical spectral monitoring of a changing-look active galactic nucleus NGC 3516 -- II. Broad-line profile variability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.00669","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":"sha256:19128771d2435ac42d86526544e7d738bbb309073117e26759a07f6a4e2f1f5b","target":"record","created_at":"2026-07-05T06:32:29Z","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":"bd623b6775186382ce0d59f680b86a7df7d98dd9398567d768ae3aada9f1b54e","cross_cats_sorted":["astro-ph.CO"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-01T13:39:56Z","title_canon_sha256":"627667414abf0365c52633076db644a97c4be4e015a9938f572626f0638b1450"},"schema_version":"1.0","source":{"id":"2306.00669","kind":"arxiv","version":1}},"canonical_sha256":"6a9b2be8b1f11f49d6901d79493625c22e8bbbc1281900de4e625c89abde787e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a9b2be8b1f11f49d6901d79493625c22e8bbbc1281900de4e625c89abde787e","first_computed_at":"2026-07-05T06:32:29.078645Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:32:29.078645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gfm/cZY/o/zcm3fcdXyevITdImq8zuHXcluw+9j3G9BFLuoY4/tYPYB1FvqdA9yFExFF9zrH8IvxaQWlfY/iDA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:32:29.080531Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.00669","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:19128771d2435ac42d86526544e7d738bbb309073117e26759a07f6a4e2f1f5b","sha256:7f5b33b3be0a86e36b852879dbae0a335060c31e279a40033dfc60ffb438f5ac"],"state_sha256":"63993392107c1001a8176983ea1a5ffb7df5893d76d7f2ba053c1237b0793898"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6YmHQsdNGn5C1nwxVScP9N4KtInowTtIMs2mkCk/s60Jeqh3KezJnTUzzGMbdTmcQ8tAhHBXjj/1oMK6n61WAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T16:13:01.946838Z","bundle_sha256":"97700c608dd85870263983ad0c0178cf369682cb8c062b4a85d4a7355cfef54a"}}