{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:RLFWLUOG5IWWS4Q4T4QLSQW3EW","short_pith_number":"pith:RLFWLUOG","canonical_record":{"source":{"id":"1205.3524","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-05-15T22:57:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"0598b6d09f2c980aa4d92a8de144e4213651581708b485f0bf349a79c0edff0c","abstract_canon_sha256":"51a744bebadae459ca4e3d393eda070037f896a3b0a5ba2e5debc5b6dd6a0c31"},"schema_version":"1.0"},"canonical_sha256":"8acb65d1c6ea2d69721c9f20b942db259b459ebe354cba35a337eeddfd15c404","source":{"kind":"arxiv","id":"1205.3524","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.3524","created_at":"2026-05-18T01:57:31Z"},{"alias_kind":"arxiv_version","alias_value":"1205.3524v1","created_at":"2026-05-18T01:57:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.3524","created_at":"2026-05-18T01:57:31Z"},{"alias_kind":"pith_short_12","alias_value":"RLFWLUOG5IWW","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RLFWLUOG5IWWS4Q4","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RLFWLUOG","created_at":"2026-05-18T12:27:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:RLFWLUOG5IWWS4Q4T4QLSQW3EW","target":"record","payload":{"canonical_record":{"source":{"id":"1205.3524","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-05-15T22:57:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"0598b6d09f2c980aa4d92a8de144e4213651581708b485f0bf349a79c0edff0c","abstract_canon_sha256":"51a744bebadae459ca4e3d393eda070037f896a3b0a5ba2e5debc5b6dd6a0c31"},"schema_version":"1.0"},"canonical_sha256":"8acb65d1c6ea2d69721c9f20b942db259b459ebe354cba35a337eeddfd15c404","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:31.748523Z","signature_b64":"eiCZiC+JTChn6IOQndoH/zln8TXUtHi0iFS7VUM1ePgr18vFVQCekUzd2Y1VVcoWr2zhTJh86QGjLA52zfEzBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8acb65d1c6ea2d69721c9f20b942db259b459ebe354cba35a337eeddfd15c404","last_reissued_at":"2026-05-18T01:57:31.747913Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:31.747913Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1205.3524","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":"2026-05-18T01:57:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e8yGYcETuBtupTC6sGnq7rNWlLogAptVvV3gIIlHiKb3Q7FC/HbAfl/Yhdx0qYwXc6kvMindFHZgmqmYrKpJDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:37:25.420132Z"},"content_sha256":"7570fb22a9dfab0beb3c682ab3e4f1462b58867c484ee20f3f83187e76141e5c","schema_version":"1.0","event_id":"sha256:7570fb22a9dfab0beb3c682ab3e4f1462b58867c484ee20f3f83187e76141e5c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:RLFWLUOG5IWWS4Q4T4QLSQW3EW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The `harder when brighter' X-ray behaviour of the low luminosity active galactic nucleus NGC 7213","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"D. E. Calvelo, D. Emmanoulopoulos, I. E. Papadakis, I. M. McHardy, P. Arevalo, P.Uttley","submitted_at":"2012-05-15T22:57:18Z","abstract_excerpt":"We present the first robust evidence of an anti-correlation between the X-ray photon index, \\Gamma, and the X-ray luminosity in a single low luminosity active galactic nuclei (LLAGN), NGC 7213. Up to now, such anti-correlation trends have been seen only in large samples of LLAGN that span a wide range of X-ray fluxes, although the opposite behaviour (i.e. a positive correlation between \\Gamma and X-ray luminosity) has been extensively studied for individual X-ray bright active galactic nuclei. For NGC 7213, we use the long-term X-ray monitoring data of Rossi X-ray Timing Explorer (RXTE), regul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.3524","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":"2026-05-18T01:57:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g099GmYRSfF64EfPtPD16LsIUL66lSzgm5A8qvB83pvx3JYthQGE3vGRoD2TSf2d/+YLcuRve7Q5k6cp+dMDDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:37:25.420780Z"},"content_sha256":"1ba5737b2e881760556af4328a5d1990a7efee84512143474f201197a90a728b","schema_version":"1.0","event_id":"sha256:1ba5737b2e881760556af4328a5d1990a7efee84512143474f201197a90a728b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RLFWLUOG5IWWS4Q4T4QLSQW3EW/bundle.json","state_url":"https://pith.science/pith/RLFWLUOG5IWWS4Q4T4QLSQW3EW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RLFWLUOG5IWWS4Q4T4QLSQW3EW/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":"2026-05-26T16:37:25Z","links":{"resolver":"https://pith.science/pith/RLFWLUOG5IWWS4Q4T4QLSQW3EW","bundle":"https://pith.science/pith/RLFWLUOG5IWWS4Q4T4QLSQW3EW/bundle.json","state":"https://pith.science/pith/RLFWLUOG5IWWS4Q4T4QLSQW3EW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RLFWLUOG5IWWS4Q4T4QLSQW3EW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:RLFWLUOG5IWWS4Q4T4QLSQW3EW","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":"51a744bebadae459ca4e3d393eda070037f896a3b0a5ba2e5debc5b6dd6a0c31","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-05-15T22:57:18Z","title_canon_sha256":"0598b6d09f2c980aa4d92a8de144e4213651581708b485f0bf349a79c0edff0c"},"schema_version":"1.0","source":{"id":"1205.3524","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.3524","created_at":"2026-05-18T01:57:31Z"},{"alias_kind":"arxiv_version","alias_value":"1205.3524v1","created_at":"2026-05-18T01:57:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.3524","created_at":"2026-05-18T01:57:31Z"},{"alias_kind":"pith_short_12","alias_value":"RLFWLUOG5IWW","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RLFWLUOG5IWWS4Q4","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RLFWLUOG","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:1ba5737b2e881760556af4328a5d1990a7efee84512143474f201197a90a728b","target":"graph","created_at":"2026-05-18T01:57:31Z","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 present the first robust evidence of an anti-correlation between the X-ray photon index, \\Gamma, and the X-ray luminosity in a single low luminosity active galactic nuclei (LLAGN), NGC 7213. Up to now, such anti-correlation trends have been seen only in large samples of LLAGN that span a wide range of X-ray fluxes, although the opposite behaviour (i.e. a positive correlation between \\Gamma and X-ray luminosity) has been extensively studied for individual X-ray bright active galactic nuclei. For NGC 7213, we use the long-term X-ray monitoring data of Rossi X-ray Timing Explorer (RXTE), regul","authors_text":"D. E. Calvelo, D. Emmanoulopoulos, I. E. Papadakis, I. M. McHardy, P. Arevalo, P.Uttley","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-05-15T22:57:18Z","title":"The `harder when brighter' X-ray behaviour of the low luminosity active galactic nucleus NGC 7213"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.3524","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":"sha256:7570fb22a9dfab0beb3c682ab3e4f1462b58867c484ee20f3f83187e76141e5c","target":"record","created_at":"2026-05-18T01:57:31Z","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":"51a744bebadae459ca4e3d393eda070037f896a3b0a5ba2e5debc5b6dd6a0c31","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-05-15T22:57:18Z","title_canon_sha256":"0598b6d09f2c980aa4d92a8de144e4213651581708b485f0bf349a79c0edff0c"},"schema_version":"1.0","source":{"id":"1205.3524","kind":"arxiv","version":1}},"canonical_sha256":"8acb65d1c6ea2d69721c9f20b942db259b459ebe354cba35a337eeddfd15c404","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8acb65d1c6ea2d69721c9f20b942db259b459ebe354cba35a337eeddfd15c404","first_computed_at":"2026-05-18T01:57:31.747913Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:31.747913Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eiCZiC+JTChn6IOQndoH/zln8TXUtHi0iFS7VUM1ePgr18vFVQCekUzd2Y1VVcoWr2zhTJh86QGjLA52zfEzBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:31.748523Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.3524","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7570fb22a9dfab0beb3c682ab3e4f1462b58867c484ee20f3f83187e76141e5c","sha256:1ba5737b2e881760556af4328a5d1990a7efee84512143474f201197a90a728b"],"state_sha256":"1105a0d2389f2123d2854696597c83f8a87168e00a1b736776981802198f84b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FAyI1DYSPX7OhcNftdRfjIWWw552ekuQ60n7sHt+n6tYE9KyV/9EZbVdhT/yLR24EilapwAhJAApLS6iNQ8uBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:37:25.423493Z","bundle_sha256":"0ff596c3f89ffb693447768fe20db9c7551e1aa21c1f144328d84aca92761143"}}