{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:PVS6D4IEQWO2TI4HUAQSYLDZ5F","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":"bafe5571a4e7ccf0cc7d1e06466c1b87310d9e8ba65578f8579e9e6f4315ba05","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-01-20T21:00:00Z","title_canon_sha256":"cbd7ecfd8533956a0e5abef99cd1cd9257ea7b8cb7402e4b53084b73d8b1caca"},"schema_version":"1.0","source":{"id":"1601.06029","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06029","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06029v1","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06029","created_at":"2026-05-18T01:19:05Z"},{"alias_kind":"pith_short_12","alias_value":"PVS6D4IEQWO2","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"PVS6D4IEQWO2TI4H","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"PVS6D4IE","created_at":"2026-05-18T12:30:39Z"}],"graph_snapshots":[{"event_id":"sha256:f61fc925c9f9fa75c0cfa17169d631e6a65069de9eeb2b034b6abb37f6b950e6","target":"graph","created_at":"2026-05-18T01:19:05Z","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 present deep LOFAR observations between 120-181 MHz of the \"Toothbrush\" (RX J0603.3+4214), a cluster that contains one of the brightest radio relic sources known. Our LOFAR observations exploit a new and novel calibration scheme to probe 10 times deeper than any previous study in this relatively unexplored part of the spectrum. The LOFAR observations, when combined with VLA, GMRT, and Chandra X-ray data, provide new information about the nature of cluster merger shocks and their role in re-accelerating relativistic particles. We derive a spectral index of $\\alpha = -0.8 \\pm 0.1$ at the nort","authors_text":"A. Bonafede, A. Simionescu, A. Stroe, C. Ferrari, C. Horellou, C. Jones, C. L. Sarazin, D. A. Rafferty, E. Orr\\'u, F. Andrade-Santos, F. De Gasperin, G. A. Ogrean, G. Brunetti, G. Heald, G. J. White, G. K. Miley, H. J. A. R\\\"ottgering, H. T. Intema, J. H. Croston, J. Sabater, K. T. Chy\\.zy, L. B\\^irzan, L. Rudnick, M. Br\\\"uggen, M. Hoeft, M. J. Hardcastle, M. J. Jarvis, M. Mevius, P. N. Best, R. Cassano, R. J. van Weeren, R. Pizzo, R. P. Kraft, S. S. Murray, S. S. Sridhar, S. van der Tol, T. Ensslin, T. J. Dijkema, T. W. Shimwell, W. A. Dawson, W. L. Williams, W. R. Forman","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-01-20T21:00:00Z","title":"LOFAR, VLA, and Chandra observations of the Toothbrush galaxy cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06029","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":"sha256:83e459bc616bd016aa1f14eab7b58c3cdb3309d27d9909ce05a0ec6c8427290a","target":"record","created_at":"2026-05-18T01:19:05Z","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":"bafe5571a4e7ccf0cc7d1e06466c1b87310d9e8ba65578f8579e9e6f4315ba05","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-01-20T21:00:00Z","title_canon_sha256":"cbd7ecfd8533956a0e5abef99cd1cd9257ea7b8cb7402e4b53084b73d8b1caca"},"schema_version":"1.0","source":{"id":"1601.06029","kind":"arxiv","version":1}},"canonical_sha256":"7d65e1f104859da9a387a0212c2c79e9650b1381cf0e960d73e2d97f3d5a0ac4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7d65e1f104859da9a387a0212c2c79e9650b1381cf0e960d73e2d97f3d5a0ac4","first_computed_at":"2026-05-18T01:19:05.299545Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:05.299545Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xckiufKNkqNbf5xdzhwLNQvyocjKcfIXIHGXG4w7FjxkxZmL8LY/k0eJZ0MT2n3sS11o84vvfStKavFpecSpDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:05.300259Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06029","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:83e459bc616bd016aa1f14eab7b58c3cdb3309d27d9909ce05a0ec6c8427290a","sha256:f61fc925c9f9fa75c0cfa17169d631e6a65069de9eeb2b034b6abb37f6b950e6"],"state_sha256":"a16f88506399c317b4b3dfee35f1edea9737f06dc6eccae76037c28273c58145"}