{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ZR2ZXTMYKNH3TUZ3ERCXHUKK6E","short_pith_number":"pith:ZR2ZXTMY","canonical_record":{"source":{"id":"1801.03965","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-11T19:50:20Z","cross_cats_sorted":[],"title_canon_sha256":"8d0c3672a01bdf95b1ecd87f6f66129c066b2605fde0682e33723e563405e382","abstract_canon_sha256":"e84d089e18c73d542f29ac3fec7b84602d1bd53cf994a08cf543d451b459f104"},"schema_version":"1.0"},"canonical_sha256":"cc759bcd98534fb9d33b244573d14af1169984dd2fb79aca69d63c18755365ae","source":{"kind":"arxiv","id":"1801.03965","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03965","created_at":"2026-05-18T00:24:11Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03965v1","created_at":"2026-05-18T00:24:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03965","created_at":"2026-05-18T00:24:11Z"},{"alias_kind":"pith_short_12","alias_value":"ZR2ZXTMYKNH3","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZR2ZXTMYKNH3TUZ3","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZR2ZXTMY","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ZR2ZXTMYKNH3TUZ3ERCXHUKK6E","target":"record","payload":{"canonical_record":{"source":{"id":"1801.03965","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-11T19:50:20Z","cross_cats_sorted":[],"title_canon_sha256":"8d0c3672a01bdf95b1ecd87f6f66129c066b2605fde0682e33723e563405e382","abstract_canon_sha256":"e84d089e18c73d542f29ac3fec7b84602d1bd53cf994a08cf543d451b459f104"},"schema_version":"1.0"},"canonical_sha256":"cc759bcd98534fb9d33b244573d14af1169984dd2fb79aca69d63c18755365ae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:11.543517Z","signature_b64":"p75l4QhTUVmdGm0bQwCM6UARA7DJG4XrZyRDz3WkpHefyb8OkNXX5Mb88Tvkk45VYcuSnIcXx8U9HSG3LqpDDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc759bcd98534fb9d33b244573d14af1169984dd2fb79aca69d63c18755365ae","last_reissued_at":"2026-05-18T00:24:11.542871Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:11.542871Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.03965","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":"2026-05-18T00:24:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wlNeextcx8PjyPaO5rtFYLosNgqZyNxLxn0GS/GQARBrhHHL8drKcbLTRl9GVOQMoCSE/M5wxp5ziPjWzExUBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:14:03.008384Z"},"content_sha256":"7dfaf10303706872c0c7cedd2c29948f63b9458e0520dbaec5400030c260490c","schema_version":"1.0","event_id":"sha256:7dfaf10303706872c0c7cedd2c29948f63b9458e0520dbaec5400030c260490c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ZR2ZXTMYKNH3TUZ3ERCXHUKK6E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An extreme magneto-ionic environment associated with the fast radio burst source FRB 121102","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. M. Archibald, A. P. V. Siemion, A. Seymour, B. Marcote, C. Brinkman, C. G. Bassa, C. J. Law, C. Sobey, D. Michilli, D. Whitlow, E. A. K. Adams, F. Fernandez, G. C. Bower, G. Hellbourg, G. H. Heald, J. M. Cordes, J. W. T. Hessels, K. Gourdji, L. G. Spitler, M. A. McLaughlin, N. Maddox, P. Demorest, P. Scholz, P. Van Rooy, R. S. Lynch, R. S. Wharton, S. Bogdanov, S. Chatterjee, S. M. Ransom, S. P. Tendulkar, T. J. W. Lazio, V. Gajjar, V. M. Kaspi, Z. Paragi","submitted_at":"2018-01-11T19:50:20Z","abstract_excerpt":"Fast radio bursts (FRBs) are millisecond-duration, extragalactic radio flashes of unknown physical origin. FRB 121102, the only known repeating FRB source, has been localized to a star-forming region in a dwarf galaxy at redshift z = 0.193, and is spatially coincident with a compact, persistent radio source. The origin of the bursts, the nature of the persistent source, and the properties of the local environment are still debated. Here we present bursts that show ~100% linearly polarized emission at a very high and variable Faraday rotation measure in the source frame: RM_src = +1.46 x 10^5 r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03965","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":"2026-05-18T00:24:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M5bOWoBPJo7x7Y7AGZffrW+4Ks64/vEWnIRF9FvTZfCS1oOrrTOxVg7sat3vfZXAP5eOd9zO5Is7lr2gNHj8Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T15:14:03.008754Z"},"content_sha256":"c932af952654419c964f3fd3cb8e5efe9444ea35e8002bdb7088496e1e8a4197","schema_version":"1.0","event_id":"sha256:c932af952654419c964f3fd3cb8e5efe9444ea35e8002bdb7088496e1e8a4197"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZR2ZXTMYKNH3TUZ3ERCXHUKK6E/bundle.json","state_url":"https://pith.science/pith/ZR2ZXTMYKNH3TUZ3ERCXHUKK6E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZR2ZXTMYKNH3TUZ3ERCXHUKK6E/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":"2026-06-03T15:14:03Z","links":{"resolver":"https://pith.science/pith/ZR2ZXTMYKNH3TUZ3ERCXHUKK6E","bundle":"https://pith.science/pith/ZR2ZXTMYKNH3TUZ3ERCXHUKK6E/bundle.json","state":"https://pith.science/pith/ZR2ZXTMYKNH3TUZ3ERCXHUKK6E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZR2ZXTMYKNH3TUZ3ERCXHUKK6E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZR2ZXTMYKNH3TUZ3ERCXHUKK6E","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":"e84d089e18c73d542f29ac3fec7b84602d1bd53cf994a08cf543d451b459f104","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-11T19:50:20Z","title_canon_sha256":"8d0c3672a01bdf95b1ecd87f6f66129c066b2605fde0682e33723e563405e382"},"schema_version":"1.0","source":{"id":"1801.03965","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03965","created_at":"2026-05-18T00:24:11Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03965v1","created_at":"2026-05-18T00:24:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03965","created_at":"2026-05-18T00:24:11Z"},{"alias_kind":"pith_short_12","alias_value":"ZR2ZXTMYKNH3","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZR2ZXTMYKNH3TUZ3","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZR2ZXTMY","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:c932af952654419c964f3fd3cb8e5efe9444ea35e8002bdb7088496e1e8a4197","target":"graph","created_at":"2026-05-18T00:24:11Z","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":"Fast radio bursts (FRBs) are millisecond-duration, extragalactic radio flashes of unknown physical origin. FRB 121102, the only known repeating FRB source, has been localized to a star-forming region in a dwarf galaxy at redshift z = 0.193, and is spatially coincident with a compact, persistent radio source. The origin of the bursts, the nature of the persistent source, and the properties of the local environment are still debated. Here we present bursts that show ~100% linearly polarized emission at a very high and variable Faraday rotation measure in the source frame: RM_src = +1.46 x 10^5 r","authors_text":"A. M. Archibald, A. P. V. Siemion, A. Seymour, B. Marcote, C. Brinkman, C. G. Bassa, C. J. Law, C. Sobey, D. Michilli, D. Whitlow, E. A. K. Adams, F. Fernandez, G. C. Bower, G. Hellbourg, G. H. Heald, J. M. Cordes, J. W. T. Hessels, K. Gourdji, L. G. Spitler, M. A. McLaughlin, N. Maddox, P. Demorest, P. Scholz, P. Van Rooy, R. S. Lynch, R. S. Wharton, S. Bogdanov, S. Chatterjee, S. M. Ransom, S. P. Tendulkar, T. J. W. Lazio, V. Gajjar, V. M. Kaspi, Z. Paragi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-11T19:50:20Z","title":"An extreme magneto-ionic environment associated with the fast radio burst source FRB 121102"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03965","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":"sha256:7dfaf10303706872c0c7cedd2c29948f63b9458e0520dbaec5400030c260490c","target":"record","created_at":"2026-05-18T00:24:11Z","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":"e84d089e18c73d542f29ac3fec7b84602d1bd53cf994a08cf543d451b459f104","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-11T19:50:20Z","title_canon_sha256":"8d0c3672a01bdf95b1ecd87f6f66129c066b2605fde0682e33723e563405e382"},"schema_version":"1.0","source":{"id":"1801.03965","kind":"arxiv","version":1}},"canonical_sha256":"cc759bcd98534fb9d33b244573d14af1169984dd2fb79aca69d63c18755365ae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc759bcd98534fb9d33b244573d14af1169984dd2fb79aca69d63c18755365ae","first_computed_at":"2026-05-18T00:24:11.542871Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:11.542871Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p75l4QhTUVmdGm0bQwCM6UARA7DJG4XrZyRDz3WkpHefyb8OkNXX5Mb88Tvkk45VYcuSnIcXx8U9HSG3LqpDDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:11.543517Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.03965","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7dfaf10303706872c0c7cedd2c29948f63b9458e0520dbaec5400030c260490c","sha256:c932af952654419c964f3fd3cb8e5efe9444ea35e8002bdb7088496e1e8a4197"],"state_sha256":"5338b126099fe67dfa6a7897baa6db766148e46ce5a652c7c2ceb929978c18f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vau8Rox3a3cBLX5X02KyMsXPTbSRxbeyWZ8CA09fjTOpTcct/C1aDVQf0hECbCcf27RZK7hvZ2fyKhtuXcReCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T15:14:03.010964Z","bundle_sha256":"aecd508ee8bed877233776a445485903d094acf32106e3512f8b3edf02c1ccac"}}