{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:JNDIDYW5SLECBGBNVPDBPXI67Q","short_pith_number":"pith:JNDIDYW5","canonical_record":{"source":{"id":"2506.03540","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-04T03:49:43Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"20bf0dfedc6c6a65002b532f2de97b255de9da2da09ffde9499afe2deb653d5f","abstract_canon_sha256":"81b331f452f73dee533228ac09909402210fe4e59df704995f79840dd385f766"},"schema_version":"1.0"},"canonical_sha256":"4b4681e2dd92c820982dabc617dd1efc323e58c27a035047b58c2f3b25de709b","source":{"kind":"arxiv","id":"2506.03540","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.03540","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"arxiv_version","alias_value":"2506.03540v1","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.03540","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"pith_short_12","alias_value":"JNDIDYW5SLEC","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"pith_short_16","alias_value":"JNDIDYW5SLECBGBN","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"pith_short_8","alias_value":"JNDIDYW5","created_at":"2026-07-05T11:40:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:JNDIDYW5SLECBGBNVPDBPXI67Q","target":"record","payload":{"canonical_record":{"source":{"id":"2506.03540","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-04T03:49:43Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"20bf0dfedc6c6a65002b532f2de97b255de9da2da09ffde9499afe2deb653d5f","abstract_canon_sha256":"81b331f452f73dee533228ac09909402210fe4e59df704995f79840dd385f766"},"schema_version":"1.0"},"canonical_sha256":"4b4681e2dd92c820982dabc617dd1efc323e58c27a035047b58c2f3b25de709b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:40:34.518482Z","signature_b64":"mKAQmc8a8hoefi1jiTLp75kVuzEyQMXLYuLlLBZk2vDzTaULO8dbtvsbm/Imk1TQ/57SuouTaJOMmvBMgE1WAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4b4681e2dd92c820982dabc617dd1efc323e58c27a035047b58c2f3b25de709b","last_reissued_at":"2026-07-05T11:40:34.518000Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:40:34.518000Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.03540","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":"2026-07-05T11:40:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UMXKAsb/akfpSaoZzFFhQWqDn7zLkP6kVgJMJXfybrfvC+nS9pyJ/OW/UAiHd6pAYZ01U2x9LgKTmC6QhvtuAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T03:44:48.275772Z"},"content_sha256":"e3d8abee9e49fcba9679369df2a09f9b8ab3317559f459f7ba6a1fc462ce2e6b","schema_version":"1.0","event_id":"sha256:e3d8abee9e49fcba9679369df2a09f9b8ab3317559f459f7ba6a1fc462ce2e6b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:JNDIDYW5SLECBGBNVPDBPXI67Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Changing Look AGN: A study of Optical/UV and the Highly Ionized Fe K$\\alpha$ X-ray Line Flux Variations Using Photo-Ionization Simulations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Agata Rozanska, Krzysztof Hryniewicz, Santanu Mondal, Tek P. Adhikari, Zhicheng He","submitted_at":"2025-06-04T03:49:43Z","abstract_excerpt":"Significant variability in broad emission line strengths of active galactic nuclei (AGN) over months to years has been observed, often accompanied by intrinsic continuum changes. Such spectral variability challenges the traditional AGN classification scheme, which attributes differences between Type 1 and Type 2 to geometrical effects, as transitions between these types occur on timescales shorter than viscous ones. In this work, using the {\\sc cloudy} photo-ionization simulations, we investigated the response of the major emission line fluxes, in the optical/UV and hard X-ray bands, to change"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.03540","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/2506.03540/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":"2026-07-05T11:40:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XsasA88GR2bLdK+0AOhJYAumCZDCzl9mNWGzn+SO1skOij+NUmA/864SKe8GlE8annCcLjvVc5YhmMI5u8uACQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T03:44:48.276263Z"},"content_sha256":"1afd7c86012c84da16a87d6ecb67cb0e01df4ac44d384f8f1d6386b9cebf75c6","schema_version":"1.0","event_id":"sha256:1afd7c86012c84da16a87d6ecb67cb0e01df4ac44d384f8f1d6386b9cebf75c6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JNDIDYW5SLECBGBNVPDBPXI67Q/bundle.json","state_url":"https://pith.science/pith/JNDIDYW5SLECBGBNVPDBPXI67Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JNDIDYW5SLECBGBNVPDBPXI67Q/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":"2026-08-09T03:44:48Z","links":{"resolver":"https://pith.science/pith/JNDIDYW5SLECBGBNVPDBPXI67Q","bundle":"https://pith.science/pith/JNDIDYW5SLECBGBNVPDBPXI67Q/bundle.json","state":"https://pith.science/pith/JNDIDYW5SLECBGBNVPDBPXI67Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JNDIDYW5SLECBGBNVPDBPXI67Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:JNDIDYW5SLECBGBNVPDBPXI67Q","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":"81b331f452f73dee533228ac09909402210fe4e59df704995f79840dd385f766","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-04T03:49:43Z","title_canon_sha256":"20bf0dfedc6c6a65002b532f2de97b255de9da2da09ffde9499afe2deb653d5f"},"schema_version":"1.0","source":{"id":"2506.03540","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.03540","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"arxiv_version","alias_value":"2506.03540v1","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.03540","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"pith_short_12","alias_value":"JNDIDYW5SLEC","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"pith_short_16","alias_value":"JNDIDYW5SLECBGBN","created_at":"2026-07-05T11:40:34Z"},{"alias_kind":"pith_short_8","alias_value":"JNDIDYW5","created_at":"2026-07-05T11:40:34Z"}],"graph_snapshots":[{"event_id":"sha256:1afd7c86012c84da16a87d6ecb67cb0e01df4ac44d384f8f1d6386b9cebf75c6","target":"graph","created_at":"2026-07-05T11:40:34Z","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/2506.03540/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Significant variability in broad emission line strengths of active galactic nuclei (AGN) over months to years has been observed, often accompanied by intrinsic continuum changes. Such spectral variability challenges the traditional AGN classification scheme, which attributes differences between Type 1 and Type 2 to geometrical effects, as transitions between these types occur on timescales shorter than viscous ones. In this work, using the {\\sc cloudy} photo-ionization simulations, we investigated the response of the major emission line fluxes, in the optical/UV and hard X-ray bands, to change","authors_text":"Agata Rozanska, Krzysztof Hryniewicz, Santanu Mondal, Tek P. Adhikari, Zhicheng He","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-04T03:49:43Z","title":"Changing Look AGN: A study of Optical/UV and the Highly Ionized Fe K$\\alpha$ X-ray Line Flux Variations Using Photo-Ionization Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.03540","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:e3d8abee9e49fcba9679369df2a09f9b8ab3317559f459f7ba6a1fc462ce2e6b","target":"record","created_at":"2026-07-05T11:40:34Z","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":"81b331f452f73dee533228ac09909402210fe4e59df704995f79840dd385f766","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-04T03:49:43Z","title_canon_sha256":"20bf0dfedc6c6a65002b532f2de97b255de9da2da09ffde9499afe2deb653d5f"},"schema_version":"1.0","source":{"id":"2506.03540","kind":"arxiv","version":1}},"canonical_sha256":"4b4681e2dd92c820982dabc617dd1efc323e58c27a035047b58c2f3b25de709b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4b4681e2dd92c820982dabc617dd1efc323e58c27a035047b58c2f3b25de709b","first_computed_at":"2026-07-05T11:40:34.518000Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:40:34.518000Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mKAQmc8a8hoefi1jiTLp75kVuzEyQMXLYuLlLBZk2vDzTaULO8dbtvsbm/Imk1TQ/57SuouTaJOMmvBMgE1WAA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:40:34.518482Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.03540","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3d8abee9e49fcba9679369df2a09f9b8ab3317559f459f7ba6a1fc462ce2e6b","sha256:1afd7c86012c84da16a87d6ecb67cb0e01df4ac44d384f8f1d6386b9cebf75c6"],"state_sha256":"c37622d04f7570b73b8a88cc86b593c398931f964e2f57a2fee72d4fddc2b7e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fZmordr3nhK2P0g+SI0jWtlDlOWvLg+ZB/+4XxHZl9yQA+oVFZ57s6brGU2AtuTxBAaKr48Hs3EkLKw+l7OvDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T03:44:48.279959Z","bundle_sha256":"f47930de47cc8d57bed359e3d25f8d43c8509af1ada31e84c93ce3279c2bf1e5"}}