{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:AYA3AET53QFPQLWMNP3RMSHAHV","short_pith_number":"pith:AYA3AET5","canonical_record":{"source":{"id":"astro-ph/9703114","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-18T15:52:02Z","cross_cats_sorted":[],"title_canon_sha256":"5eb902755706549b80029c60cb3a5078246b20f8336753186f67e9deb512a120","abstract_canon_sha256":"cef1a014585c6307aa94ee4088ed31f470c58b8e79d238ee4279244b3d02451b"},"schema_version":"1.0"},"canonical_sha256":"0601b0127ddc0af82ecc6bf71648e03d5f8d1deac5ad8e93bf0872bddad0a0a8","source":{"kind":"arxiv","id":"astro-ph/9703114","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9703114","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9703114v1","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9703114","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"pith_short_12","alias_value":"AYA3AET53QFP","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"AYA3AET53QFPQLWM","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"AYA3AET5","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:AYA3AET53QFPQLWMNP3RMSHAHV","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9703114","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-18T15:52:02Z","cross_cats_sorted":[],"title_canon_sha256":"5eb902755706549b80029c60cb3a5078246b20f8336753186f67e9deb512a120","abstract_canon_sha256":"cef1a014585c6307aa94ee4088ed31f470c58b8e79d238ee4279244b3d02451b"},"schema_version":"1.0"},"canonical_sha256":"0601b0127ddc0af82ecc6bf71648e03d5f8d1deac5ad8e93bf0872bddad0a0a8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:17.980172Z","signature_b64":"1oH6PUmIoFLQjfpm/Sok2UchzhjE1DN8gooPG/sPB7n6WyHdjfOhaQa2Sdc8idC33SyXfHuYaGb3Wpv9eLNGBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0601b0127ddc0af82ecc6bf71648e03d5f8d1deac5ad8e93bf0872bddad0a0a8","last_reissued_at":"2026-05-18T01:40:17.979488Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:17.979488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9703114","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":"2026-05-18T01:40:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XRzMw/uDS1cg3qHNf326HOr62A09J5u5la2tZTnHVDTRe66BkFuOINnfdsjqzb0sqQlAnrgwQLZenqlPd8a5BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:23:34.849828Z"},"content_sha256":"dbc50d849467ce7ace724ff5301a5771e080a955af4b0b3d997c8b72e84b7aed","schema_version":"1.0","event_id":"sha256:dbc50d849467ce7ace724ff5301a5771e080a955af4b0b3d997c8b72e84b7aed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:AYA3AET53QFPQLWMNP3RMSHAHV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ROSAT monitoring of persistent giant and rapid variability in the narrow-line Seyfert 1 galaxy IRAS 13224-3809","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.C. Fabian, H.H. Fink, Th. Boller, W.N. Brandt","submitted_at":"1997-03-18T15:52:02Z","abstract_excerpt":"We report evidence for persistent giant and rapid X-ray variability in the radio-quiet, ultrasoft, strong Fe II, narrow-line Seyfert 1 galaxy IRAS 13224-3809. Within a 30 day ROSAT High Resolution Imager (HRI) monitoring observation at least five giant amplitude count rate variations are visible, with the maximum observed amplitude of variability being about a factor of 60. We detect a rise by a factor of about 57 in just two days. IRAS 13224-3809 appears to be the most X-ray variable Seyfert known, and its variability is probably nonlinear. We carefully check the identification of the highly "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9703114","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":"2026-05-18T01:40:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4BlAmCFb6iPqdfqC/q7OZzXx6Y58u3OssVS402mzvp6d22MHMLUveMitO6WnA1USA5npKYjK5UHtA62KsTn7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T16:23:34.850551Z"},"content_sha256":"d6a85ad02df96730991d70a0fe945c7a819edf6ad2410c9ab22c4295d4d7ecc1","schema_version":"1.0","event_id":"sha256:d6a85ad02df96730991d70a0fe945c7a819edf6ad2410c9ab22c4295d4d7ecc1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AYA3AET53QFPQLWMNP3RMSHAHV/bundle.json","state_url":"https://pith.science/pith/AYA3AET53QFPQLWMNP3RMSHAHV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AYA3AET53QFPQLWMNP3RMSHAHV/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":"2026-06-06T16:23:34Z","links":{"resolver":"https://pith.science/pith/AYA3AET53QFPQLWMNP3RMSHAHV","bundle":"https://pith.science/pith/AYA3AET53QFPQLWMNP3RMSHAHV/bundle.json","state":"https://pith.science/pith/AYA3AET53QFPQLWMNP3RMSHAHV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AYA3AET53QFPQLWMNP3RMSHAHV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:AYA3AET53QFPQLWMNP3RMSHAHV","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":"cef1a014585c6307aa94ee4088ed31f470c58b8e79d238ee4279244b3d02451b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-18T15:52:02Z","title_canon_sha256":"5eb902755706549b80029c60cb3a5078246b20f8336753186f67e9deb512a120"},"schema_version":"1.0","source":{"id":"astro-ph/9703114","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9703114","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9703114v1","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9703114","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"pith_short_12","alias_value":"AYA3AET53QFP","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"AYA3AET53QFPQLWM","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"AYA3AET5","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:d6a85ad02df96730991d70a0fe945c7a819edf6ad2410c9ab22c4295d4d7ecc1","target":"graph","created_at":"2026-05-18T01:40:17Z","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":"We report evidence for persistent giant and rapid X-ray variability in the radio-quiet, ultrasoft, strong Fe II, narrow-line Seyfert 1 galaxy IRAS 13224-3809. Within a 30 day ROSAT High Resolution Imager (HRI) monitoring observation at least five giant amplitude count rate variations are visible, with the maximum observed amplitude of variability being about a factor of 60. We detect a rise by a factor of about 57 in just two days. IRAS 13224-3809 appears to be the most X-ray variable Seyfert known, and its variability is probably nonlinear. We carefully check the identification of the highly ","authors_text":"A.C. Fabian, H.H. Fink, Th. Boller, W.N. Brandt","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-03-18T15:52:02Z","title":"ROSAT monitoring of persistent giant and rapid variability in the narrow-line Seyfert 1 galaxy IRAS 13224-3809"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9703114","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:dbc50d849467ce7ace724ff5301a5771e080a955af4b0b3d997c8b72e84b7aed","target":"record","created_at":"2026-05-18T01:40:17Z","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":"cef1a014585c6307aa94ee4088ed31f470c58b8e79d238ee4279244b3d02451b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-18T15:52:02Z","title_canon_sha256":"5eb902755706549b80029c60cb3a5078246b20f8336753186f67e9deb512a120"},"schema_version":"1.0","source":{"id":"astro-ph/9703114","kind":"arxiv","version":1}},"canonical_sha256":"0601b0127ddc0af82ecc6bf71648e03d5f8d1deac5ad8e93bf0872bddad0a0a8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0601b0127ddc0af82ecc6bf71648e03d5f8d1deac5ad8e93bf0872bddad0a0a8","first_computed_at":"2026-05-18T01:40:17.979488Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:17.979488Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1oH6PUmIoFLQjfpm/Sok2UchzhjE1DN8gooPG/sPB7n6WyHdjfOhaQa2Sdc8idC33SyXfHuYaGb3Wpv9eLNGBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:17.980172Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9703114","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dbc50d849467ce7ace724ff5301a5771e080a955af4b0b3d997c8b72e84b7aed","sha256:d6a85ad02df96730991d70a0fe945c7a819edf6ad2410c9ab22c4295d4d7ecc1"],"state_sha256":"73b2dd8852585b72fe7e94e46abba75c78c8c13f7ef2b4295a510b802ff603df"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8hgpByXX7q/84+MPvBd2f7B0Yg6GOxhJ/Yv82/C53mpevxztVJ6Ni5s2yUusna25hbbICXN9gOxnL23c3YIaBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T16:23:34.854353Z","bundle_sha256":"a689c026dee51ed993b3fd8a2e5d6d21b6b4a2ff36b1211c232172b5af95c595"}}