{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:6RJNGJ5SWAHQPODC6NDVYIFGIO","short_pith_number":"pith:6RJNGJ5S","canonical_record":{"source":{"id":"1109.3762","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-17T09:24:32Z","cross_cats_sorted":[],"title_canon_sha256":"803a4c47a889fb74767388efa73fcd5833b3ddb2cb9eef26671b6f34396b8b31","abstract_canon_sha256":"404cb055b6f5787a0f78f4c6362c3f96a431513d9cd06827cc0eb2b46cfb706a"},"schema_version":"1.0"},"canonical_sha256":"f452d327b2b00f07b862f3475c20a6439f1cb6870d305f7172c8fe05d15ec5d7","source":{"kind":"arxiv","id":"1109.3762","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.3762","created_at":"2026-05-18T02:00:31Z"},{"alias_kind":"arxiv_version","alias_value":"1109.3762v1","created_at":"2026-05-18T02:00:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.3762","created_at":"2026-05-18T02:00:31Z"},{"alias_kind":"pith_short_12","alias_value":"6RJNGJ5SWAHQ","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6RJNGJ5SWAHQPODC","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6RJNGJ5S","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:6RJNGJ5SWAHQPODC6NDVYIFGIO","target":"record","payload":{"canonical_record":{"source":{"id":"1109.3762","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-17T09:24:32Z","cross_cats_sorted":[],"title_canon_sha256":"803a4c47a889fb74767388efa73fcd5833b3ddb2cb9eef26671b6f34396b8b31","abstract_canon_sha256":"404cb055b6f5787a0f78f4c6362c3f96a431513d9cd06827cc0eb2b46cfb706a"},"schema_version":"1.0"},"canonical_sha256":"f452d327b2b00f07b862f3475c20a6439f1cb6870d305f7172c8fe05d15ec5d7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:31.492783Z","signature_b64":"AAFW/sXUWRd/xLz+ay8x+KKXzAXjvmvGlCKYadoFpA/czFdE9Cyqzm1Msp1/oqnux9PiEeOJ1nS7o1SM8+X3Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f452d327b2b00f07b862f3475c20a6439f1cb6870d305f7172c8fe05d15ec5d7","last_reissued_at":"2026-05-18T02:00:31.492204Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:31.492204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.3762","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":"2026-05-18T02:00:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3AoKmJsQhM5yNCF6zWoU+1lMqyOdvX/RzWh3WaLRJ3Z8yr9Oto1pxsG0YtJj85p3IZDpsOiqzFG9e/LjuEtMBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:45:06.624594Z"},"content_sha256":"ab347a2ce3f2e5c795649136675ca2e1b27ce8078db4f861c64e16b8b4d678de","schema_version":"1.0","event_id":"sha256:ab347a2ce3f2e5c795649136675ca2e1b27ce8078db4f861c64e16b8b4d678de"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:6RJNGJ5SWAHQPODC6NDVYIFGIO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Suzaku view of X-ray Spectral Variability of the Radio Galaxy Centaurus A : Partial Covering Absorber, Reflector, and Possible Jet Component","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"H. Takahashi, K. Hayashi, K. Hiragi, M. Mizuno, M. Ohno, S. Nishino, S. Yamazaki, Y. Fukazawa","submitted_at":"2011-09-17T09:24:32Z","abstract_excerpt":"We observed a nearby radio galaxy, the Centaurus A (Cen A), three times with Suzaku in 2009, and measured the wide-band X-ray spectral variability more accurately than the previous measurements. The Cen A was in the active phase in 2009, and the flux became higher by a factor of 1.5--2.0 and the spectrum became harder than that in 2005. The Fe-K line intensity increased by 20--30% from 2005 to 2009. The correlation of the count rate between the XIS 3--8 keV and PIN 15--40 keV band showed a complex behavior with a deviation from a linear relation. The wide-band X-ray continuum in 2--200 keV can"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.3762","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":"2026-05-18T02:00:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"61mY7ZU8f25tJUmsaIACKndSJZOkxeSIVfZsHse7bBiJzAZbQiEo9OqPZzVbYxZ3CTwFtmFkhQrn8pqx1qDxAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T23:45:06.625240Z"},"content_sha256":"5c0f9f7223399424b96bf06210175fc77897a6d74773d1f3746255e15cc8452a","schema_version":"1.0","event_id":"sha256:5c0f9f7223399424b96bf06210175fc77897a6d74773d1f3746255e15cc8452a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6RJNGJ5SWAHQPODC6NDVYIFGIO/bundle.json","state_url":"https://pith.science/pith/6RJNGJ5SWAHQPODC6NDVYIFGIO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6RJNGJ5SWAHQPODC6NDVYIFGIO/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":"2026-05-27T23:45:06Z","links":{"resolver":"https://pith.science/pith/6RJNGJ5SWAHQPODC6NDVYIFGIO","bundle":"https://pith.science/pith/6RJNGJ5SWAHQPODC6NDVYIFGIO/bundle.json","state":"https://pith.science/pith/6RJNGJ5SWAHQPODC6NDVYIFGIO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6RJNGJ5SWAHQPODC6NDVYIFGIO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:6RJNGJ5SWAHQPODC6NDVYIFGIO","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":"404cb055b6f5787a0f78f4c6362c3f96a431513d9cd06827cc0eb2b46cfb706a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-17T09:24:32Z","title_canon_sha256":"803a4c47a889fb74767388efa73fcd5833b3ddb2cb9eef26671b6f34396b8b31"},"schema_version":"1.0","source":{"id":"1109.3762","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.3762","created_at":"2026-05-18T02:00:31Z"},{"alias_kind":"arxiv_version","alias_value":"1109.3762v1","created_at":"2026-05-18T02:00:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.3762","created_at":"2026-05-18T02:00:31Z"},{"alias_kind":"pith_short_12","alias_value":"6RJNGJ5SWAHQ","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6RJNGJ5SWAHQPODC","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6RJNGJ5S","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:5c0f9f7223399424b96bf06210175fc77897a6d74773d1f3746255e15cc8452a","target":"graph","created_at":"2026-05-18T02:00:31Z","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 observed a nearby radio galaxy, the Centaurus A (Cen A), three times with Suzaku in 2009, and measured the wide-band X-ray spectral variability more accurately than the previous measurements. The Cen A was in the active phase in 2009, and the flux became higher by a factor of 1.5--2.0 and the spectrum became harder than that in 2005. The Fe-K line intensity increased by 20--30% from 2005 to 2009. The correlation of the count rate between the XIS 3--8 keV and PIN 15--40 keV band showed a complex behavior with a deviation from a linear relation. The wide-band X-ray continuum in 2--200 keV can","authors_text":"H. Takahashi, K. Hayashi, K. Hiragi, M. Mizuno, M. Ohno, S. Nishino, S. Yamazaki, Y. Fukazawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-17T09:24:32Z","title":"Suzaku view of X-ray Spectral Variability of the Radio Galaxy Centaurus A : Partial Covering Absorber, Reflector, and Possible Jet Component"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.3762","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:ab347a2ce3f2e5c795649136675ca2e1b27ce8078db4f861c64e16b8b4d678de","target":"record","created_at":"2026-05-18T02:00:31Z","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":"404cb055b6f5787a0f78f4c6362c3f96a431513d9cd06827cc0eb2b46cfb706a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-17T09:24:32Z","title_canon_sha256":"803a4c47a889fb74767388efa73fcd5833b3ddb2cb9eef26671b6f34396b8b31"},"schema_version":"1.0","source":{"id":"1109.3762","kind":"arxiv","version":1}},"canonical_sha256":"f452d327b2b00f07b862f3475c20a6439f1cb6870d305f7172c8fe05d15ec5d7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f452d327b2b00f07b862f3475c20a6439f1cb6870d305f7172c8fe05d15ec5d7","first_computed_at":"2026-05-18T02:00:31.492204Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:31.492204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AAFW/sXUWRd/xLz+ay8x+KKXzAXjvmvGlCKYadoFpA/czFdE9Cyqzm1Msp1/oqnux9PiEeOJ1nS7o1SM8+X3Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:31.492783Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.3762","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ab347a2ce3f2e5c795649136675ca2e1b27ce8078db4f861c64e16b8b4d678de","sha256:5c0f9f7223399424b96bf06210175fc77897a6d74773d1f3746255e15cc8452a"],"state_sha256":"e958928db8bce0260b12e4306fd9830566f1847d0c530354616b3fcc78383f4f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1Wf7Oh2TIglQstV02nk5bZrnjsVgx+ltP+2v1JJiTtvVIfsrrriaN6KMwoflJE/XYIgJ/wKHjTXxEcW9CIhsAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T23:45:06.628349Z","bundle_sha256":"1302be2c5dea596f4b962f6b751131ae2cd1a1761374c21d41bb7a4a60f3820f"}}