{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:25RRPDLZ2HQMNXYOR64F4B5HSM","short_pith_number":"pith:25RRPDLZ","canonical_record":{"source":{"id":"1704.03673","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-12T09:45:13Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"0d553b5da087af6865983214a22b5c0a9b74cc382f1c40432d8447f25be4851d","abstract_canon_sha256":"b0594fb8a1172c77c33a35b174221bf0fb74b5142a94a2f2e86ad1ba14f6a322"},"schema_version":"1.0"},"canonical_sha256":"d763178d79d1e0c6df0e8fb85e07a7931637c679fdd3d0c9893420a1ab3a321e","source":{"kind":"arxiv","id":"1704.03673","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.03673","created_at":"2026-05-18T00:42:28Z"},{"alias_kind":"arxiv_version","alias_value":"1704.03673v1","created_at":"2026-05-18T00:42:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.03673","created_at":"2026-05-18T00:42:28Z"},{"alias_kind":"pith_short_12","alias_value":"25RRPDLZ2HQM","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"25RRPDLZ2HQMNXYO","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"25RRPDLZ","created_at":"2026-05-18T12:30:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:25RRPDLZ2HQMNXYOR64F4B5HSM","target":"record","payload":{"canonical_record":{"source":{"id":"1704.03673","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-12T09:45:13Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"0d553b5da087af6865983214a22b5c0a9b74cc382f1c40432d8447f25be4851d","abstract_canon_sha256":"b0594fb8a1172c77c33a35b174221bf0fb74b5142a94a2f2e86ad1ba14f6a322"},"schema_version":"1.0"},"canonical_sha256":"d763178d79d1e0c6df0e8fb85e07a7931637c679fdd3d0c9893420a1ab3a321e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:28.932479Z","signature_b64":"TxTmlL2E6LNbmK20ItVtc/wUrRBxhX4fF5aigToAy/PlW1YcmQ4Zvedc9O/IrKpLRejAQ9n4m1dJNjQ9BjpnAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d763178d79d1e0c6df0e8fb85e07a7931637c679fdd3d0c9893420a1ab3a321e","last_reissued_at":"2026-05-18T00:42:28.931920Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:28.931920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.03673","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":"2026-05-18T00:42:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s7Qry1fiuK9Unu9nnMJrUgi9wsqaVsmyabO+MHgM56BouFWZZFwLnCK0JFWkmZzSzd/F4a62tnjKURJlXPQnBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T09:23:16.176171Z"},"content_sha256":"847c3733da8569548f3bf8e817d91235d1479d54e61dca045d3d2d18b4d69f70","schema_version":"1.0","event_id":"sha256:847c3733da8569548f3bf8e817d91235d1479d54e61dca045d3d2d18b4d69f70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:25RRPDLZ2HQMNXYOR64F4B5HSM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The X-ray reflection spectrum of the radio-loud quasar 4C 74.26","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Andrew Fabian, Anne Lohfink, Charles Hailey, Claudio Ricci, Daniel Stern, David Ballantyne, Duncan Farrah, Finn Christensen, Fiona Harrison, Javier Garcia, Peter Boorman, Steven Boggs, William Craig, William Zhang","submitted_at":"2017-04-12T09:45:13Z","abstract_excerpt":"The relativistic jets created by some active galactic nuclei are important agents of AGN feedback. In spite of this, our understanding of what produces these jets is still incomplete. X-ray observations, which can probe the processes operating in the central regions in immediate vicinity of the supermassive black hole, the presumed jet launching point, are potentially particularly valuable in illuminating the jet formation process. Here, we present the hard X-ray NuSTAR observations of the radio-loud quasar 4C 74.26 in a joint analysis with quasi-simultaneous, soft X-ray Swift observations. Ou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.03673","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":"2026-05-18T00:42:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1zDbbGs+iNB9u+rmBIX4+x9zftfDN1g2K0PlH215db5eHMkSEUZny8udxgQw17x9/YkJKRU4LdxLVS7vvvDFBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T09:23:16.176535Z"},"content_sha256":"583a8e94a72972f2d377d0df073bcfcd7b06711a1b246965461e7239a18eb7c1","schema_version":"1.0","event_id":"sha256:583a8e94a72972f2d377d0df073bcfcd7b06711a1b246965461e7239a18eb7c1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/25RRPDLZ2HQMNXYOR64F4B5HSM/bundle.json","state_url":"https://pith.science/pith/25RRPDLZ2HQMNXYOR64F4B5HSM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/25RRPDLZ2HQMNXYOR64F4B5HSM/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":"2026-06-01T09:23:16Z","links":{"resolver":"https://pith.science/pith/25RRPDLZ2HQMNXYOR64F4B5HSM","bundle":"https://pith.science/pith/25RRPDLZ2HQMNXYOR64F4B5HSM/bundle.json","state":"https://pith.science/pith/25RRPDLZ2HQMNXYOR64F4B5HSM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/25RRPDLZ2HQMNXYOR64F4B5HSM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:25RRPDLZ2HQMNXYOR64F4B5HSM","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":"b0594fb8a1172c77c33a35b174221bf0fb74b5142a94a2f2e86ad1ba14f6a322","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-12T09:45:13Z","title_canon_sha256":"0d553b5da087af6865983214a22b5c0a9b74cc382f1c40432d8447f25be4851d"},"schema_version":"1.0","source":{"id":"1704.03673","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.03673","created_at":"2026-05-18T00:42:28Z"},{"alias_kind":"arxiv_version","alias_value":"1704.03673v1","created_at":"2026-05-18T00:42:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.03673","created_at":"2026-05-18T00:42:28Z"},{"alias_kind":"pith_short_12","alias_value":"25RRPDLZ2HQM","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"25RRPDLZ2HQMNXYO","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"25RRPDLZ","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:583a8e94a72972f2d377d0df073bcfcd7b06711a1b246965461e7239a18eb7c1","target":"graph","created_at":"2026-05-18T00:42:28Z","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":"The relativistic jets created by some active galactic nuclei are important agents of AGN feedback. In spite of this, our understanding of what produces these jets is still incomplete. X-ray observations, which can probe the processes operating in the central regions in immediate vicinity of the supermassive black hole, the presumed jet launching point, are potentially particularly valuable in illuminating the jet formation process. Here, we present the hard X-ray NuSTAR observations of the radio-loud quasar 4C 74.26 in a joint analysis with quasi-simultaneous, soft X-ray Swift observations. Ou","authors_text":"Andrew Fabian, Anne Lohfink, Charles Hailey, Claudio Ricci, Daniel Stern, David Ballantyne, Duncan Farrah, Finn Christensen, Fiona Harrison, Javier Garcia, Peter Boorman, Steven Boggs, William Craig, William Zhang","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-12T09:45:13Z","title":"The X-ray reflection spectrum of the radio-loud quasar 4C 74.26"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.03673","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":"sha256:847c3733da8569548f3bf8e817d91235d1479d54e61dca045d3d2d18b4d69f70","target":"record","created_at":"2026-05-18T00:42:28Z","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":"b0594fb8a1172c77c33a35b174221bf0fb74b5142a94a2f2e86ad1ba14f6a322","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-12T09:45:13Z","title_canon_sha256":"0d553b5da087af6865983214a22b5c0a9b74cc382f1c40432d8447f25be4851d"},"schema_version":"1.0","source":{"id":"1704.03673","kind":"arxiv","version":1}},"canonical_sha256":"d763178d79d1e0c6df0e8fb85e07a7931637c679fdd3d0c9893420a1ab3a321e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d763178d79d1e0c6df0e8fb85e07a7931637c679fdd3d0c9893420a1ab3a321e","first_computed_at":"2026-05-18T00:42:28.931920Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:28.931920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TxTmlL2E6LNbmK20ItVtc/wUrRBxhX4fF5aigToAy/PlW1YcmQ4Zvedc9O/IrKpLRejAQ9n4m1dJNjQ9BjpnAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:28.932479Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.03673","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:847c3733da8569548f3bf8e817d91235d1479d54e61dca045d3d2d18b4d69f70","sha256:583a8e94a72972f2d377d0df073bcfcd7b06711a1b246965461e7239a18eb7c1"],"state_sha256":"f20120776c46fa59d7177c77bf01760747fe82fe2b6821743629d2db18c4cbb9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rx0KsF1xy9LER+2iZr5yj2NtE0oGd4W5gnGvcETW9GrqqJI+hAiiI0KrpeOhH/oEXD3gb9jhbmdVfEY/Q3CsBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T09:23:16.178538Z","bundle_sha256":"2db8a281a1c8736f6ebdb6cf67a95698c353b2ca6a86ac012f179b4c46efce98"}}