{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ZW7SOUX2H73ODORKRGMYT5CFJT","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":"9077241e184ff39dd2e3dd1bb1d737cda2f081d98b42fdfe27b5d44e18655c6a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-18T13:52:30Z","title_canon_sha256":"e420f60e240cbf97783620fbb6314b8b63c3f49f556106e1c9944d1595037558"},"schema_version":"1.0","source":{"id":"1906.07584","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.07584","created_at":"2026-05-17T23:43:07Z"},{"alias_kind":"arxiv_version","alias_value":"1906.07584v1","created_at":"2026-05-17T23:43:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.07584","created_at":"2026-05-17T23:43:07Z"},{"alias_kind":"pith_short_12","alias_value":"ZW7SOUX2H73O","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZW7SOUX2H73ODORK","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZW7SOUX2","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:49d72d7b8da86771a047f2cead7fadbf0544523736c21157a456121fca2a7338","target":"graph","created_at":"2026-05-17T23:43:07Z","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":"Galaxy clusters are the most massive gravitationally bound structures in the Universe. They grow by accreting smaller structures in a merging process that produces shocks and turbulence in the intra-cluster gas. We observed a ridge of radio emission connecting the merging galaxy clusters Abell 0399 and Abell 0401 with the Low Frequency Array (LOFAR) at 140 MHz. This emission requires a population of relativistic electrons and a magnetic field located in a filament between the two galaxy clusters. We performed simulations to show that a volume-filling distribution of weak shocks may re-accelera","authors_text":"A. Bonafede, A.M.M. Scaife, C. Ferrari, C. Gheller, C. Horellou, E. Orr\\`u, F. De Gasperin, F. Govoni, F. Loi, F. Vazza, G. Bernardi, G. Brunetti, G. Giovannini, H.J.A. R\\\"ottgering, H. Junklewitz, L. Feretti, M. Br\\\"uggen, M. Hoeft, M. Iacobelli, M. Murgia, M. Wise, R. Cassano, R.F. Pizzo, R.J. van Weeren, R. Paladino, S. Manti, T.A. En{\\ss}lin, T.W. Shimwell, V. Vacca","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-18T13:52:30Z","title":"A radio ridge connecting two galaxy clusters in a filament of the cosmic web"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.07584","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":"sha256:69dca00bddaf4e5dfd546e4616ddbc56f954cfce81acaa426a6d68c03fa2c9d4","target":"record","created_at":"2026-05-17T23:43:07Z","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":"9077241e184ff39dd2e3dd1bb1d737cda2f081d98b42fdfe27b5d44e18655c6a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-06-18T13:52:30Z","title_canon_sha256":"e420f60e240cbf97783620fbb6314b8b63c3f49f556106e1c9944d1595037558"},"schema_version":"1.0","source":{"id":"1906.07584","kind":"arxiv","version":1}},"canonical_sha256":"cdbf2752fa3ff6e1ba2a899989f4454cebb1bb68e19a1b8eaf1a0cf90f56fbf6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdbf2752fa3ff6e1ba2a899989f4454cebb1bb68e19a1b8eaf1a0cf90f56fbf6","first_computed_at":"2026-05-17T23:43:07.431771Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:07.431771Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IZOEeYwtDBd1RYCiGcMItvRBE2LdVX/tQ97Ays5duf6YbdtMLrdIYwv3H++hMkVJ7m4YVI2Bm7DIuoYj1YlHBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:07.432526Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.07584","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:69dca00bddaf4e5dfd546e4616ddbc56f954cfce81acaa426a6d68c03fa2c9d4","sha256:49d72d7b8da86771a047f2cead7fadbf0544523736c21157a456121fca2a7338"],"state_sha256":"a0e9ef5a9fd42ebcdddb969b0e0711f60f66f84464858a2752a1150a2efd5f91"}