{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:HT3QK6DVWRX5RIP6LO64HHI7SK","short_pith_number":"pith:HT3QK6DV","canonical_record":{"source":{"id":"1809.00010","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-31T18:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"24eba94972eff750f9990811118727ba6094ba77e2b800bb32b0f7087ff2fe3d","abstract_canon_sha256":"02029a4628ce76e77ee81223cad93f1b19dce58aa4bec60de6b356caab006af8"},"schema_version":"1.0"},"canonical_sha256":"3cf7057875b46fd8a1fe5bbdc39d1f92bb2761ce8c23ceadc6873b87c582bdee","source":{"kind":"arxiv","id":"1809.00010","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.00010","created_at":"2026-05-17T23:46:19Z"},{"alias_kind":"arxiv_version","alias_value":"1809.00010v2","created_at":"2026-05-17T23:46:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.00010","created_at":"2026-05-17T23:46:19Z"},{"alias_kind":"pith_short_12","alias_value":"HT3QK6DVWRX5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HT3QK6DVWRX5RIP6","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HT3QK6DV","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:HT3QK6DVWRX5RIP6LO64HHI7SK","target":"record","payload":{"canonical_record":{"source":{"id":"1809.00010","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-31T18:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"24eba94972eff750f9990811118727ba6094ba77e2b800bb32b0f7087ff2fe3d","abstract_canon_sha256":"02029a4628ce76e77ee81223cad93f1b19dce58aa4bec60de6b356caab006af8"},"schema_version":"1.0"},"canonical_sha256":"3cf7057875b46fd8a1fe5bbdc39d1f92bb2761ce8c23ceadc6873b87c582bdee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:19.448114Z","signature_b64":"Is9m2VIoGlCERpxeHjFaKnmXli21UNXDm4C2b9degKCTf1nF5IqIYtK0SmIrgw/xjZLJSdxI9DKG/LsZvrZaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3cf7057875b46fd8a1fe5bbdc39d1f92bb2761ce8c23ceadc6873b87c582bdee","last_reissued_at":"2026-05-17T23:46:19.447310Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:19.447310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.00010","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:46:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FCah7TI46oRMRKbfD8BZdeeFawsVBsn/jJX+LcbtYiKR4W+xLItxVdkw1RzB56cY89khWKwtCYpU3ZJkWxY9DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T06:42:20.523740Z"},"content_sha256":"5d92bda809308cffd38c12798b98c6b1910d39a8e5f57910e3709bb1f6c785ef","schema_version":"1.0","event_id":"sha256:5d92bda809308cffd38c12798b98c6b1910d39a8e5f57910e3709bb1f6c785ef"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:HT3QK6DVWRX5RIP6LO64HHI7SK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Black hole mass and spin estimates of the most distant quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Annalisa Celotti, Gabriele Ghisellini, Samuele Campitiello, Tullia Sbarrato","submitted_at":"2018-08-31T18:00:02Z","abstract_excerpt":"We investigate the properties of the most distant quasars ULASJ134208.10+092838.61 ($z = 7.54$), ULASJ112001.48+064124.3 ($z = 7.08$) and DELSJ003836.10-152723.6 ($z = 7.02$) studying their Optical-UV emission that shows clear evidence of the presence of an accretion disk. We model such emission applying the relativistic disk models KERRBB and SLIMBH for which we have derived some analytical approximations to describe the observed emission as a function of the black hole mass, accretion rate, spin and the viewing angle. We found that: 1] our black hole mass estimates are compatible with the on"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.00010","kind":"arxiv","version":2},"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":"2026-05-17T23:46:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N/gHU9DSWB7AT3qZgIPze3vKv52OqDdPW7BICNaEebTw30TVuk31SysqlaWuLLtnhJqucJHjiWdP/dsDpHFDAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T06:42:20.524402Z"},"content_sha256":"a8a0ddf089235921693af0c917a19fcad747435a77420c010929a0ad4f4ec336","schema_version":"1.0","event_id":"sha256:a8a0ddf089235921693af0c917a19fcad747435a77420c010929a0ad4f4ec336"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HT3QK6DVWRX5RIP6LO64HHI7SK/bundle.json","state_url":"https://pith.science/pith/HT3QK6DVWRX5RIP6LO64HHI7SK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HT3QK6DVWRX5RIP6LO64HHI7SK/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":"2026-06-06T06:42:20Z","links":{"resolver":"https://pith.science/pith/HT3QK6DVWRX5RIP6LO64HHI7SK","bundle":"https://pith.science/pith/HT3QK6DVWRX5RIP6LO64HHI7SK/bundle.json","state":"https://pith.science/pith/HT3QK6DVWRX5RIP6LO64HHI7SK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HT3QK6DVWRX5RIP6LO64HHI7SK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:HT3QK6DVWRX5RIP6LO64HHI7SK","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":"02029a4628ce76e77ee81223cad93f1b19dce58aa4bec60de6b356caab006af8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-31T18:00:02Z","title_canon_sha256":"24eba94972eff750f9990811118727ba6094ba77e2b800bb32b0f7087ff2fe3d"},"schema_version":"1.0","source":{"id":"1809.00010","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.00010","created_at":"2026-05-17T23:46:19Z"},{"alias_kind":"arxiv_version","alias_value":"1809.00010v2","created_at":"2026-05-17T23:46:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.00010","created_at":"2026-05-17T23:46:19Z"},{"alias_kind":"pith_short_12","alias_value":"HT3QK6DVWRX5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"HT3QK6DVWRX5RIP6","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"HT3QK6DV","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:a8a0ddf089235921693af0c917a19fcad747435a77420c010929a0ad4f4ec336","target":"graph","created_at":"2026-05-17T23:46:19Z","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 investigate the properties of the most distant quasars ULASJ134208.10+092838.61 ($z = 7.54$), ULASJ112001.48+064124.3 ($z = 7.08$) and DELSJ003836.10-152723.6 ($z = 7.02$) studying their Optical-UV emission that shows clear evidence of the presence of an accretion disk. We model such emission applying the relativistic disk models KERRBB and SLIMBH for which we have derived some analytical approximations to describe the observed emission as a function of the black hole mass, accretion rate, spin and the viewing angle. We found that: 1] our black hole mass estimates are compatible with the on","authors_text":"Annalisa Celotti, Gabriele Ghisellini, Samuele Campitiello, Tullia Sbarrato","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-31T18:00:02Z","title":"Black hole mass and spin estimates of the most distant quasars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.00010","kind":"arxiv","version":2},"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":"sha256:5d92bda809308cffd38c12798b98c6b1910d39a8e5f57910e3709bb1f6c785ef","target":"record","created_at":"2026-05-17T23:46:19Z","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":"02029a4628ce76e77ee81223cad93f1b19dce58aa4bec60de6b356caab006af8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-31T18:00:02Z","title_canon_sha256":"24eba94972eff750f9990811118727ba6094ba77e2b800bb32b0f7087ff2fe3d"},"schema_version":"1.0","source":{"id":"1809.00010","kind":"arxiv","version":2}},"canonical_sha256":"3cf7057875b46fd8a1fe5bbdc39d1f92bb2761ce8c23ceadc6873b87c582bdee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3cf7057875b46fd8a1fe5bbdc39d1f92bb2761ce8c23ceadc6873b87c582bdee","first_computed_at":"2026-05-17T23:46:19.447310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:19.447310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Is9m2VIoGlCERpxeHjFaKnmXli21UNXDm4C2b9degKCTf1nF5IqIYtK0SmIrgw/xjZLJSdxI9DKG/LsZvrZaAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:19.448114Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.00010","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d92bda809308cffd38c12798b98c6b1910d39a8e5f57910e3709bb1f6c785ef","sha256:a8a0ddf089235921693af0c917a19fcad747435a77420c010929a0ad4f4ec336"],"state_sha256":"6f4486e14567e8872042e2c4554dc2cfe837106191b676230ef33f376212332e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z3H1jBMqsmVJiO++1A/zCWc+JOwT84MUib3qcKMleo/iZ0E6fq0vekYNClGqTnIrVAQvErS28o1FXzztWyraCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T06:42:20.528306Z","bundle_sha256":"fc00a3187689805182ac7c79871cba4e8419573b78a29aca19487020af0dfa81"}}