{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:OZEXEIGVA2FP3TTDUO6LXBIXKZ","short_pith_number":"pith:OZEXEIGV","canonical_record":{"source":{"id":"2208.04067","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-08T11:39:56Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"fb487b0d06f5ea17074d68a0d733fef4e57f5b866df51de44c4dd570e9b19a5a","abstract_canon_sha256":"02eae9256608193e0769bfeaad5f347bb5ec7e28b099bf14f449ffda9519805b"},"schema_version":"1.0"},"canonical_sha256":"76497220d5068afdce63a3bcbb85175668701b1b72c6378b762dde2d1ad75592","source":{"kind":"arxiv","id":"2208.04067","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.04067","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"arxiv_version","alias_value":"2208.04067v2","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.04067","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"pith_short_12","alias_value":"OZEXEIGVA2FP","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"pith_short_16","alias_value":"OZEXEIGVA2FP3TTD","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"pith_short_8","alias_value":"OZEXEIGV","created_at":"2026-07-05T05:02:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:OZEXEIGVA2FP3TTDUO6LXBIXKZ","target":"record","payload":{"canonical_record":{"source":{"id":"2208.04067","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-08T11:39:56Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"fb487b0d06f5ea17074d68a0d733fef4e57f5b866df51de44c4dd570e9b19a5a","abstract_canon_sha256":"02eae9256608193e0769bfeaad5f347bb5ec7e28b099bf14f449ffda9519805b"},"schema_version":"1.0"},"canonical_sha256":"76497220d5068afdce63a3bcbb85175668701b1b72c6378b762dde2d1ad75592","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:02:02.393259Z","signature_b64":"DXbotrws/JnRplWXQC//io27aKT/1HCqjTbSLhU7MLnrYB+UyK7glx3YnQcoDZ11acKNLXYiZbyy6rQHOVpIDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"76497220d5068afdce63a3bcbb85175668701b1b72c6378b762dde2d1ad75592","last_reissued_at":"2026-07-05T05:02:02.392848Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:02:02.392848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2208.04067","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:02:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P72b+OWXbANYXuzzv4F/pQY/e4PffTNoHpK7nUmo9/z7NeQbmIGfCYDSpF0zmYMfMNHmmfGwCms4OrKgey4sAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-24T05:11:45.213087Z"},"content_sha256":"c1f46b5d0b9acf383430c197d619964f676615d3417bcebc254792fb68364362","schema_version":"1.0","event_id":"sha256:c1f46b5d0b9acf383430c197d619964f676615d3417bcebc254792fb68364362"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:OZEXEIGVA2FP3TTDUO6LXBIXKZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The origin of the vanishing soft X-ray excess in the changing-look Active Galactic Nucleus Mrk 590","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Gulab C. Dewangan, Kunal Deshmukh, Ritaban Chatterjee, Ritesh Ghosh (IUCAA), Sibasish Laha (NASA-GSFC), Varun Bhalerao","submitted_at":"2022-08-08T11:39:56Z","abstract_excerpt":"We have studied the nature and origin of the soft X-ray excess detected in the interesting changing-look AGN (CLAGN) Mrk~590 using two decades of multi-wavelength observations from \\xmm{}, \\suzaku{}, \\swift{} and \\nustar{}. In the light of vanishing soft excess in this CLAGN, we test two models, \"the warm Comptonization\" and \"the ionized disk reflection\" using extensive UV/X-ray spectral analysis. Our main findings are: (1) the soft X-ray excess emission, last observed in 2004, vanished in 2011, and never reappeared in any of the later observations, (2) we detected a significant variability ($"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.04067","kind":"arxiv","version":2},"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/2208.04067/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":"2026-07-05T05:02:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+9NV5R+wY79FQaMVqVtNd4qz1OVuikHAMVVtCNOpwNir23e9oyGChzch67qwW5KV+6D/AbGtGCpmNnODtcPVAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-24T05:11:45.213484Z"},"content_sha256":"82788b1ce0c86818c5eaec0f8db367b07bb67a9c20eb2581fe1324451149a83c","schema_version":"1.0","event_id":"sha256:82788b1ce0c86818c5eaec0f8db367b07bb67a9c20eb2581fe1324451149a83c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OZEXEIGVA2FP3TTDUO6LXBIXKZ/bundle.json","state_url":"https://pith.science/pith/OZEXEIGVA2FP3TTDUO6LXBIXKZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OZEXEIGVA2FP3TTDUO6LXBIXKZ/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":"2026-07-24T05:11:45Z","links":{"resolver":"https://pith.science/pith/OZEXEIGVA2FP3TTDUO6LXBIXKZ","bundle":"https://pith.science/pith/OZEXEIGVA2FP3TTDUO6LXBIXKZ/bundle.json","state":"https://pith.science/pith/OZEXEIGVA2FP3TTDUO6LXBIXKZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OZEXEIGVA2FP3TTDUO6LXBIXKZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:OZEXEIGVA2FP3TTDUO6LXBIXKZ","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":"02eae9256608193e0769bfeaad5f347bb5ec7e28b099bf14f449ffda9519805b","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-08T11:39:56Z","title_canon_sha256":"fb487b0d06f5ea17074d68a0d733fef4e57f5b866df51de44c4dd570e9b19a5a"},"schema_version":"1.0","source":{"id":"2208.04067","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.04067","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"arxiv_version","alias_value":"2208.04067v2","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.04067","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"pith_short_12","alias_value":"OZEXEIGVA2FP","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"pith_short_16","alias_value":"OZEXEIGVA2FP3TTD","created_at":"2026-07-05T05:02:02Z"},{"alias_kind":"pith_short_8","alias_value":"OZEXEIGV","created_at":"2026-07-05T05:02:02Z"}],"graph_snapshots":[{"event_id":"sha256:82788b1ce0c86818c5eaec0f8db367b07bb67a9c20eb2581fe1324451149a83c","target":"graph","created_at":"2026-07-05T05:02:02Z","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/2208.04067/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have studied the nature and origin of the soft X-ray excess detected in the interesting changing-look AGN (CLAGN) Mrk~590 using two decades of multi-wavelength observations from \\xmm{}, \\suzaku{}, \\swift{} and \\nustar{}. In the light of vanishing soft excess in this CLAGN, we test two models, \"the warm Comptonization\" and \"the ionized disk reflection\" using extensive UV/X-ray spectral analysis. Our main findings are: (1) the soft X-ray excess emission, last observed in 2004, vanished in 2011, and never reappeared in any of the later observations, (2) we detected a significant variability ($","authors_text":"Gulab C. Dewangan, Kunal Deshmukh, Ritaban Chatterjee, Ritesh Ghosh (IUCAA), Sibasish Laha (NASA-GSFC), Varun Bhalerao","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-08T11:39:56Z","title":"The origin of the vanishing soft X-ray excess in the changing-look Active Galactic Nucleus Mrk 590"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.04067","kind":"arxiv","version":2},"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:c1f46b5d0b9acf383430c197d619964f676615d3417bcebc254792fb68364362","target":"record","created_at":"2026-07-05T05:02:02Z","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":"02eae9256608193e0769bfeaad5f347bb5ec7e28b099bf14f449ffda9519805b","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-08-08T11:39:56Z","title_canon_sha256":"fb487b0d06f5ea17074d68a0d733fef4e57f5b866df51de44c4dd570e9b19a5a"},"schema_version":"1.0","source":{"id":"2208.04067","kind":"arxiv","version":2}},"canonical_sha256":"76497220d5068afdce63a3bcbb85175668701b1b72c6378b762dde2d1ad75592","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76497220d5068afdce63a3bcbb85175668701b1b72c6378b762dde2d1ad75592","first_computed_at":"2026-07-05T05:02:02.392848Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:02:02.392848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DXbotrws/JnRplWXQC//io27aKT/1HCqjTbSLhU7MLnrYB+UyK7glx3YnQcoDZ11acKNLXYiZbyy6rQHOVpIDw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:02:02.393259Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.04067","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c1f46b5d0b9acf383430c197d619964f676615d3417bcebc254792fb68364362","sha256:82788b1ce0c86818c5eaec0f8db367b07bb67a9c20eb2581fe1324451149a83c"],"state_sha256":"739e13e0dc759f378eea001c9c4d252e8427f199a835486651958fc08a190473"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7uGVGMDfSFmxQDG6PgZ9rF9X+m/w5E6zLz57P9KdH5uSZv3uDi7CkKfcU0olldDbi7cksJjS2hhIJ70KAJk0AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-24T05:11:45.215937Z","bundle_sha256":"3bb40c937a5f457ca96c8e7baf5a7c301386d2f7ec84bab015653b310944c551"}}