{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:NTEQ3RGD5QTOVSJC4Y55HWO67S","short_pith_number":"pith:NTEQ3RGD","canonical_record":{"source":{"id":"2501.07637","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-13T19:01:03Z","cross_cats_sorted":[],"title_canon_sha256":"4bdb839f31d2b3b2d6c35425611386363543548da5cb3198d6b807d6b00f54ce","abstract_canon_sha256":"39706745634ee9f592416394655c1bd860ebe6f6809f3eeb357413f0546127af"},"schema_version":"1.0"},"canonical_sha256":"6cc90dc4c3ec26eac922e63bd3d9defcab1a2d51d7890200d218bd91f1f32eb0","source":{"kind":"arxiv","id":"2501.07637","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.07637","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"arxiv_version","alias_value":"2501.07637v1","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.07637","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"pith_short_12","alias_value":"NTEQ3RGD5QTO","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"pith_short_16","alias_value":"NTEQ3RGD5QTOVSJC","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"pith_short_8","alias_value":"NTEQ3RGD","created_at":"2026-07-05T10:00:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:NTEQ3RGD5QTOVSJC4Y55HWO67S","target":"record","payload":{"canonical_record":{"source":{"id":"2501.07637","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-13T19:01:03Z","cross_cats_sorted":[],"title_canon_sha256":"4bdb839f31d2b3b2d6c35425611386363543548da5cb3198d6b807d6b00f54ce","abstract_canon_sha256":"39706745634ee9f592416394655c1bd860ebe6f6809f3eeb357413f0546127af"},"schema_version":"1.0"},"canonical_sha256":"6cc90dc4c3ec26eac922e63bd3d9defcab1a2d51d7890200d218bd91f1f32eb0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:00:48.014365Z","signature_b64":"L41ejH7MzkNgDdh0EozsHGnQhYItWn7g3vDSCQFc4r8ipfSupQgWxUwVtKxPvCF2FGhGGDCBmyix710YotQ0CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cc90dc4c3ec26eac922e63bd3d9defcab1a2d51d7890200d218bd91f1f32eb0","last_reissued_at":"2026-07-05T10:00:48.013919Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:00:48.013919Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.07637","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":"2026-07-05T10:00:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cTmfjluDiFiv63b/9tA4zCtu6POvNk+D5MJRJrktG5wiKvTVu4LMhJhm3TQKNK/m73P151AENTUHOzOkMw3IBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:48:16.768441Z"},"content_sha256":"1848ebb70820a046957d470860d81d17fba888457c3fdface58df336a8c9dc5a","schema_version":"1.0","event_id":"sha256:1848ebb70820a046957d470860d81d17fba888457c3fdface58df336a8c9dc5a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:NTEQ3RGD5QTOVSJC4Y55HWO67S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NuSTAR observations of a varying-flux quasar in the Epoch of Reionization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Andrew Fabian, Aneta Siemiginowska, Brian W. Grefenstette, C. C. Cheung, Chiara Mazzucchelli, C. Megan Urry, Daniel Stern, Eduardo Ba\\~nados, Emmanuel Momjian, Giulia Migliori, Lea Marcotulli, Peter G. Boorman, Silvia Belladitta, Sof\\'ia Rojas-Ruiz, Thomas Connor, Yana Khusanova","submitted_at":"2025-01-13T19:01:03Z","abstract_excerpt":"With enough X-ray flux to be detected in a 160s scan by SRG/eROSITA, the $z = 6.19$ quasar CFHQS J142952+544717 is, by far, the most luminous X-ray source known at $z > 6$. We present deep (245 ks) NuSTAR observations of this source; with $\\sim180$ net counts in the combined observations, CFHQS J142952+544717 is the most distant object ever observed by the observatory. Fortuitously, this source was independently observed by Chandra $\\sim110$ days earlier, enabling the identification of two nearby (30'' and 45'' away), fainter X-ray sources. We jointly fit both Chandra and NuSTAR observations--"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.07637","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.07637/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":"2026-07-05T10:00:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yWEy6lli3vAbcS335dQ9iVX9H9o6/WtjuZ+sr8dDttf9rrlnP/Nm8qQwks5aN17P8aaOfi5iL1dH8WzG8RXxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:48:16.768814Z"},"content_sha256":"39c6b2b187b91f2972d8add5e75f66610d22d7a59005c56589cfd519728c0c8c","schema_version":"1.0","event_id":"sha256:39c6b2b187b91f2972d8add5e75f66610d22d7a59005c56589cfd519728c0c8c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NTEQ3RGD5QTOVSJC4Y55HWO67S/bundle.json","state_url":"https://pith.science/pith/NTEQ3RGD5QTOVSJC4Y55HWO67S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NTEQ3RGD5QTOVSJC4Y55HWO67S/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":"2026-07-07T14:48:16Z","links":{"resolver":"https://pith.science/pith/NTEQ3RGD5QTOVSJC4Y55HWO67S","bundle":"https://pith.science/pith/NTEQ3RGD5QTOVSJC4Y55HWO67S/bundle.json","state":"https://pith.science/pith/NTEQ3RGD5QTOVSJC4Y55HWO67S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NTEQ3RGD5QTOVSJC4Y55HWO67S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:NTEQ3RGD5QTOVSJC4Y55HWO67S","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":"39706745634ee9f592416394655c1bd860ebe6f6809f3eeb357413f0546127af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-13T19:01:03Z","title_canon_sha256":"4bdb839f31d2b3b2d6c35425611386363543548da5cb3198d6b807d6b00f54ce"},"schema_version":"1.0","source":{"id":"2501.07637","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.07637","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"arxiv_version","alias_value":"2501.07637v1","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.07637","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"pith_short_12","alias_value":"NTEQ3RGD5QTO","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"pith_short_16","alias_value":"NTEQ3RGD5QTOVSJC","created_at":"2026-07-05T10:00:48Z"},{"alias_kind":"pith_short_8","alias_value":"NTEQ3RGD","created_at":"2026-07-05T10:00:48Z"}],"graph_snapshots":[{"event_id":"sha256:39c6b2b187b91f2972d8add5e75f66610d22d7a59005c56589cfd519728c0c8c","target":"graph","created_at":"2026-07-05T10:00:48Z","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/2501.07637/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"With enough X-ray flux to be detected in a 160s scan by SRG/eROSITA, the $z = 6.19$ quasar CFHQS J142952+544717 is, by far, the most luminous X-ray source known at $z > 6$. We present deep (245 ks) NuSTAR observations of this source; with $\\sim180$ net counts in the combined observations, CFHQS J142952+544717 is the most distant object ever observed by the observatory. Fortuitously, this source was independently observed by Chandra $\\sim110$ days earlier, enabling the identification of two nearby (30'' and 45'' away), fainter X-ray sources. We jointly fit both Chandra and NuSTAR observations--","authors_text":"Andrew Fabian, Aneta Siemiginowska, Brian W. Grefenstette, C. C. Cheung, Chiara Mazzucchelli, C. Megan Urry, Daniel Stern, Eduardo Ba\\~nados, Emmanuel Momjian, Giulia Migliori, Lea Marcotulli, Peter G. Boorman, Silvia Belladitta, Sof\\'ia Rojas-Ruiz, Thomas Connor, Yana Khusanova","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-13T19:01:03Z","title":"NuSTAR observations of a varying-flux quasar in the Epoch of Reionization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.07637","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":"sha256:1848ebb70820a046957d470860d81d17fba888457c3fdface58df336a8c9dc5a","target":"record","created_at":"2026-07-05T10:00:48Z","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":"39706745634ee9f592416394655c1bd860ebe6f6809f3eeb357413f0546127af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-13T19:01:03Z","title_canon_sha256":"4bdb839f31d2b3b2d6c35425611386363543548da5cb3198d6b807d6b00f54ce"},"schema_version":"1.0","source":{"id":"2501.07637","kind":"arxiv","version":1}},"canonical_sha256":"6cc90dc4c3ec26eac922e63bd3d9defcab1a2d51d7890200d218bd91f1f32eb0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6cc90dc4c3ec26eac922e63bd3d9defcab1a2d51d7890200d218bd91f1f32eb0","first_computed_at":"2026-07-05T10:00:48.013919Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:00:48.013919Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"L41ejH7MzkNgDdh0EozsHGnQhYItWn7g3vDSCQFc4r8ipfSupQgWxUwVtKxPvCF2FGhGGDCBmyix710YotQ0CA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:00:48.014365Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.07637","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1848ebb70820a046957d470860d81d17fba888457c3fdface58df336a8c9dc5a","sha256:39c6b2b187b91f2972d8add5e75f66610d22d7a59005c56589cfd519728c0c8c"],"state_sha256":"9dc6943cdb7a61dcc1c692f7f658b5946fa616e39490341b7348f8c69bd5f9ac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fVx5wwwAqyf7TxC/oG7I3Gh1g+GEKij5aCcinOCt0C6ZN6sgPCgdkiK13USxOO17Mm6miHoDWLFkNwashSgFAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T14:48:16.772957Z","bundle_sha256":"9e9922355bf01a6fb2148bb2f3a5286f6ee281af6cad06438d7a2113d313ca12"}}