{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CBBR73ND5KIXPSY2EGZU2GWEVU","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":"52b23e9f540ad4b2dc56bf71a1aa922150e7eaaedd29d024c993e0586b9b709a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-03-05T05:57:57Z","title_canon_sha256":"6812e1dd612d9fe3138f35fc095026f878518443106fd2ec1090dfe66577e36b"},"schema_version":"1.0","source":{"id":"1803.01510","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.01510","created_at":"2026-05-18T00:18:51Z"},{"alias_kind":"arxiv_version","alias_value":"1803.01510v1","created_at":"2026-05-18T00:18:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.01510","created_at":"2026-05-18T00:18:51Z"},{"alias_kind":"pith_short_12","alias_value":"CBBR73ND5KIX","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_16","alias_value":"CBBR73ND5KIXPSY2","created_at":"2026-05-18T12:32:16Z"},{"alias_kind":"pith_short_8","alias_value":"CBBR73ND","created_at":"2026-05-18T12:32:16Z"}],"graph_snapshots":[{"event_id":"sha256:27ab89e7767b0ba77a94b608b9cbb818102e4951335a55737b62bdae656c7139","target":"graph","created_at":"2026-05-18T00:18:51Z","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 on Gemini, NuSTAR and 8-year Fermi observations of the most distant blazar QSO~J0906$+$6930 ($z=5.48$). We construct a broadband spectral energy distribution (SED) and model the SED using a synchro-Compton model. The measurements find a $\\sim 4 \\times 10^9 M_\\odot$ mass for the black hole and a spectral break at $\\sim$4 keV in the combined fit of the new NuSTAR and archival Chandra data. The SED fitting constrains the bulk Doppler factor $\\delta$ of the jet to $9^{+2.5}_{-3}$ for QSO~J0906$+$6930. Similar, but weaker $\\delta$ constraints are derived from SED modeling of the three oth","authors_text":"Hongjun An, Roger W. Romani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-03-05T05:57:57Z","title":"SED constraints on the highest-$z$ blazar jet: QSO J0906+6930"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.01510","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":"sha256:97f3c7cb45d0fabd6c52383c18de37d95d734c8e5377e1abf675dfe02b15ed93","target":"record","created_at":"2026-05-18T00:18:51Z","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":"52b23e9f540ad4b2dc56bf71a1aa922150e7eaaedd29d024c993e0586b9b709a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-03-05T05:57:57Z","title_canon_sha256":"6812e1dd612d9fe3138f35fc095026f878518443106fd2ec1090dfe66577e36b"},"schema_version":"1.0","source":{"id":"1803.01510","kind":"arxiv","version":1}},"canonical_sha256":"10431feda3ea9177cb1a21b34d1ac4ad2e48abffc24c126dc8e72bee7d26c671","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10431feda3ea9177cb1a21b34d1ac4ad2e48abffc24c126dc8e72bee7d26c671","first_computed_at":"2026-05-18T00:18:51.579671Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:51.579671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KCEJgFPJs2IoUT7xwc5ORbT9FrYRhyrkVGetpSAPdUJYVB/06f+DbnghQzo/5M3KDf3LzVD7TIJ3S6OkFrfpBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:51.580122Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.01510","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97f3c7cb45d0fabd6c52383c18de37d95d734c8e5377e1abf675dfe02b15ed93","sha256:27ab89e7767b0ba77a94b608b9cbb818102e4951335a55737b62bdae656c7139"],"state_sha256":"7a8bef7c10b79cd9b2ba2f82fc030826b0c628700bdf55265b2350147a14bcfb"}