{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:EHROOKUF2YCNGV72BWBPOVVCMP","short_pith_number":"pith:EHROOKUF","canonical_record":{"source":{"id":"1608.06684","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-24T01:53:20Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"bbd5572c296a8ddc1cdc35a793b11ddfcf705ce8a6758da140d08cff85861393","abstract_canon_sha256":"e876a869c9cf68849856a374953d54b92467146ab6eecd955b7aeacd499697e0"},"schema_version":"1.0"},"canonical_sha256":"21e2e72a85d604d357fa0d82f756a263ecdbb9ba7d254c81be649e467d454055","source":{"kind":"arxiv","id":"1608.06684","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.06684","created_at":"2026-05-18T01:07:20Z"},{"alias_kind":"arxiv_version","alias_value":"1608.06684v1","created_at":"2026-05-18T01:07:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.06684","created_at":"2026-05-18T01:07:20Z"},{"alias_kind":"pith_short_12","alias_value":"EHROOKUF2YCN","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"EHROOKUF2YCNGV72","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"EHROOKUF","created_at":"2026-05-18T12:30:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:EHROOKUF2YCNGV72BWBPOVVCMP","target":"record","payload":{"canonical_record":{"source":{"id":"1608.06684","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-24T01:53:20Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"bbd5572c296a8ddc1cdc35a793b11ddfcf705ce8a6758da140d08cff85861393","abstract_canon_sha256":"e876a869c9cf68849856a374953d54b92467146ab6eecd955b7aeacd499697e0"},"schema_version":"1.0"},"canonical_sha256":"21e2e72a85d604d357fa0d82f756a263ecdbb9ba7d254c81be649e467d454055","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:20.023416Z","signature_b64":"hIJ+tq4JUBNY0q27zkY+2ybTbq0LZRC0t1tv2VaPZPnkwdIPu7j76j4u/TMoVxHT63c3MRuAAPfgm+cghWJBCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21e2e72a85d604d357fa0d82f756a263ecdbb9ba7d254c81be649e467d454055","last_reissued_at":"2026-05-18T01:07:20.023040Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:20.023040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.06684","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":"2026-05-18T01:07:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yo0ceYkBu/6GyJOH5Pdv2Y+KmFQIHFklIX/GySf8ubgy+E6BBFG+/c1MskoEOcTPABdMDVuv5piaI6d/Ku5AAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T01:51:50.144085Z"},"content_sha256":"bb1caf83bf437a3c87480b91c575326db1c295c9b0de1284421c5410cfe49e97","schema_version":"1.0","event_id":"sha256:bb1caf83bf437a3c87480b91c575326db1c295c9b0de1284421c5410cfe49e97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:EHROOKUF2YCNGV72BWBPOVVCMP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Parsec-scale jet properties of the quasar PG 1302$-$102","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"A. Mangalam, E. Kun, K. E. Gabanyi, P. Mohan, S. Frey, T. An","submitted_at":"2016-08-24T01:53:20Z","abstract_excerpt":"The quasar PG 1302$-$102 is believed to harbour a supermassive binary black hole (SMBBH) system. Using the available 15 GHz and $2-8$ GHz, multi-epoch Very Long Baseline Array data, we constrain the pc-scale jet properties based on the inferred mean proper motion, including a bulk Lorentz factor $\\geq 5.1 \\pm 0.8$, jet inclination angle $\\leq (11.4 \\pm 1.7)$ degrees, projected position angle $= 31.8$ degrees, intrinsic half opening angle $\\leq (0.9 \\pm 0.1)$ degrees and a mean $2-8$ GHz spectral index of 0.31. A general relativistic helical jet model is presented and applied to predict quasi-p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.06684","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":"2026-05-18T01:07:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ro99ehCIlQ/NSKAFkqiy26zHd7fsloqsVToSs6L4CuQfomuX0o9uBtRjojtqraUOyMVo+dfR4SUHqotM2IEICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T01:51:50.144751Z"},"content_sha256":"0b1b71906ce69f2966e2efb6e92064ca0bffd87ebd47f691fa5bfa3f9240db23","schema_version":"1.0","event_id":"sha256:0b1b71906ce69f2966e2efb6e92064ca0bffd87ebd47f691fa5bfa3f9240db23"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EHROOKUF2YCNGV72BWBPOVVCMP/bundle.json","state_url":"https://pith.science/pith/EHROOKUF2YCNGV72BWBPOVVCMP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EHROOKUF2YCNGV72BWBPOVVCMP/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":"2026-05-19T01:51:50Z","links":{"resolver":"https://pith.science/pith/EHROOKUF2YCNGV72BWBPOVVCMP","bundle":"https://pith.science/pith/EHROOKUF2YCNGV72BWBPOVVCMP/bundle.json","state":"https://pith.science/pith/EHROOKUF2YCNGV72BWBPOVVCMP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EHROOKUF2YCNGV72BWBPOVVCMP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:EHROOKUF2YCNGV72BWBPOVVCMP","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":"e876a869c9cf68849856a374953d54b92467146ab6eecd955b7aeacd499697e0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-24T01:53:20Z","title_canon_sha256":"bbd5572c296a8ddc1cdc35a793b11ddfcf705ce8a6758da140d08cff85861393"},"schema_version":"1.0","source":{"id":"1608.06684","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.06684","created_at":"2026-05-18T01:07:20Z"},{"alias_kind":"arxiv_version","alias_value":"1608.06684v1","created_at":"2026-05-18T01:07:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.06684","created_at":"2026-05-18T01:07:20Z"},{"alias_kind":"pith_short_12","alias_value":"EHROOKUF2YCN","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"EHROOKUF2YCNGV72","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"EHROOKUF","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:0b1b71906ce69f2966e2efb6e92064ca0bffd87ebd47f691fa5bfa3f9240db23","target":"graph","created_at":"2026-05-18T01:07:20Z","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 quasar PG 1302$-$102 is believed to harbour a supermassive binary black hole (SMBBH) system. Using the available 15 GHz and $2-8$ GHz, multi-epoch Very Long Baseline Array data, we constrain the pc-scale jet properties based on the inferred mean proper motion, including a bulk Lorentz factor $\\geq 5.1 \\pm 0.8$, jet inclination angle $\\leq (11.4 \\pm 1.7)$ degrees, projected position angle $= 31.8$ degrees, intrinsic half opening angle $\\leq (0.9 \\pm 0.1)$ degrees and a mean $2-8$ GHz spectral index of 0.31. A general relativistic helical jet model is presented and applied to predict quasi-p","authors_text":"A. Mangalam, E. Kun, K. E. Gabanyi, P. Mohan, S. Frey, T. An","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-24T01:53:20Z","title":"Parsec-scale jet properties of the quasar PG 1302$-$102"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.06684","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:bb1caf83bf437a3c87480b91c575326db1c295c9b0de1284421c5410cfe49e97","target":"record","created_at":"2026-05-18T01:07:20Z","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":"e876a869c9cf68849856a374953d54b92467146ab6eecd955b7aeacd499697e0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-08-24T01:53:20Z","title_canon_sha256":"bbd5572c296a8ddc1cdc35a793b11ddfcf705ce8a6758da140d08cff85861393"},"schema_version":"1.0","source":{"id":"1608.06684","kind":"arxiv","version":1}},"canonical_sha256":"21e2e72a85d604d357fa0d82f756a263ecdbb9ba7d254c81be649e467d454055","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"21e2e72a85d604d357fa0d82f756a263ecdbb9ba7d254c81be649e467d454055","first_computed_at":"2026-05-18T01:07:20.023040Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:20.023040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hIJ+tq4JUBNY0q27zkY+2ybTbq0LZRC0t1tv2VaPZPnkwdIPu7j76j4u/TMoVxHT63c3MRuAAPfgm+cghWJBCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:20.023416Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.06684","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb1caf83bf437a3c87480b91c575326db1c295c9b0de1284421c5410cfe49e97","sha256:0b1b71906ce69f2966e2efb6e92064ca0bffd87ebd47f691fa5bfa3f9240db23"],"state_sha256":"83f6c601a5e7f17e365afd0ec4d3d953ec3616197c993b746d86db0d9f2be394"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aclUNBLBd0oy0aKtxnnO5knLhfB5RyG17z9mb410emuUyOYDe1h9bZy3qdnPkNvwALanidNysLTPdqwngwTSCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T01:51:50.146523Z","bundle_sha256":"0fca5b6ca4e77dbaf9e55591aedbf68db40b047a6091736c217e4e2055d78876"}}