{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:T3ZB7DUH7FO6DULUIAG3OSPHRN","short_pith_number":"pith:T3ZB7DUH","canonical_record":{"source":{"id":"2111.02439","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-03T18:01:15Z","cross_cats_sorted":[],"title_canon_sha256":"bc0abc2f76350987b66d661fd396e0dba548f74363964a7a3057d9f85ecb06d2","abstract_canon_sha256":"1062055e4159461e04bb9af43d195297f9791bc06571185155ee47b3c9a9a5c4"},"schema_version":"1.0"},"canonical_sha256":"9ef21f8e87f95de1d174400db749e78b68a56afb1ef252eb8491be4d708458a6","source":{"kind":"arxiv","id":"2111.02439","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.02439","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"arxiv_version","alias_value":"2111.02439v2","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.02439","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"pith_short_12","alias_value":"T3ZB7DUH7FO6","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"pith_short_16","alias_value":"T3ZB7DUH7FO6DULU","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"pith_short_8","alias_value":"T3ZB7DUH","created_at":"2026-07-05T03:56:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:T3ZB7DUH7FO6DULUIAG3OSPHRN","target":"record","payload":{"canonical_record":{"source":{"id":"2111.02439","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-03T18:01:15Z","cross_cats_sorted":[],"title_canon_sha256":"bc0abc2f76350987b66d661fd396e0dba548f74363964a7a3057d9f85ecb06d2","abstract_canon_sha256":"1062055e4159461e04bb9af43d195297f9791bc06571185155ee47b3c9a9a5c4"},"schema_version":"1.0"},"canonical_sha256":"9ef21f8e87f95de1d174400db749e78b68a56afb1ef252eb8491be4d708458a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:56:51.801092Z","signature_b64":"27sSS9aOGDZph/Kzk93LVXD3INIHpj4TGSJWnI6G4h6zRRdjesYVnkncb3D4Rw7V1coItwFe3vMaFFMkaz7yCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ef21f8e87f95de1d174400db749e78b68a56afb1ef252eb8491be4d708458a6","last_reissued_at":"2026-07-05T03:56:51.800586Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:56:51.800586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.02439","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":"2026-07-05T03:56:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1v3/NzyGBlt86iH0VSrHVIJXJkFq99LJxm/gbZwjtE06k+c0B6D5HWbhS4nwhs+vUL3F4B9+FjM1O7JpDwvsAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:11:13.670849Z"},"content_sha256":"eac3a4ab67d0151a5d448aa7116a171511ab1394d50162eaabdcdc4ac59ba049","schema_version":"1.0","event_id":"sha256:eac3a4ab67d0151a5d448aa7116a171511ab1394d50162eaabdcdc4ac59ba049"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:T3ZB7DUH7FO6DULUIAG3OSPHRN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"What really makes an accretion disc MAD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Jason Dexter, Mitchell C. Begelman, Nicolas Scepi","submitted_at":"2021-11-03T18:01:15Z","abstract_excerpt":"Magnetically arrested accretion discs (MADs) around black holes (BH) have the potential to stimulate the production of powerful jets and account for recent ultra-high-resolution observations of BH environments. Their main properties are usually attributed to the accumulation of dynamically significant net magnetic (vertical) flux throughout the arrested region, which is then regulated by interchange instabilities. Here we propose instead that it is mainly a dynamically important {\\it toroidal} field -- the result of dynamo action triggered by the significant but still relatively weak vertical "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.02439","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2111.02439/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:56:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xjCKswavmRxV9KmYzQdFuYKMK8m8gilzPbnAa+qmLIiLMx3lm+a+3QaIkwQlTKV/vTtklt9VcNrMTMHQM6L7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:11:13.671330Z"},"content_sha256":"aeba859fcd73f3d6a2291124e5a08b39247f2f5302ae82134ab7e25e88c7e19c","schema_version":"1.0","event_id":"sha256:aeba859fcd73f3d6a2291124e5a08b39247f2f5302ae82134ab7e25e88c7e19c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T3ZB7DUH7FO6DULUIAG3OSPHRN/bundle.json","state_url":"https://pith.science/pith/T3ZB7DUH7FO6DULUIAG3OSPHRN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T3ZB7DUH7FO6DULUIAG3OSPHRN/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":"2026-08-04T09:11:13Z","links":{"resolver":"https://pith.science/pith/T3ZB7DUH7FO6DULUIAG3OSPHRN","bundle":"https://pith.science/pith/T3ZB7DUH7FO6DULUIAG3OSPHRN/bundle.json","state":"https://pith.science/pith/T3ZB7DUH7FO6DULUIAG3OSPHRN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T3ZB7DUH7FO6DULUIAG3OSPHRN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:T3ZB7DUH7FO6DULUIAG3OSPHRN","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":"1062055e4159461e04bb9af43d195297f9791bc06571185155ee47b3c9a9a5c4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-03T18:01:15Z","title_canon_sha256":"bc0abc2f76350987b66d661fd396e0dba548f74363964a7a3057d9f85ecb06d2"},"schema_version":"1.0","source":{"id":"2111.02439","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.02439","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"arxiv_version","alias_value":"2111.02439v2","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.02439","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"pith_short_12","alias_value":"T3ZB7DUH7FO6","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"pith_short_16","alias_value":"T3ZB7DUH7FO6DULU","created_at":"2026-07-05T03:56:51Z"},{"alias_kind":"pith_short_8","alias_value":"T3ZB7DUH","created_at":"2026-07-05T03:56:51Z"}],"graph_snapshots":[{"event_id":"sha256:aeba859fcd73f3d6a2291124e5a08b39247f2f5302ae82134ab7e25e88c7e19c","target":"graph","created_at":"2026-07-05T03:56:51Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2111.02439/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Magnetically arrested accretion discs (MADs) around black holes (BH) have the potential to stimulate the production of powerful jets and account for recent ultra-high-resolution observations of BH environments. Their main properties are usually attributed to the accumulation of dynamically significant net magnetic (vertical) flux throughout the arrested region, which is then regulated by interchange instabilities. Here we propose instead that it is mainly a dynamically important {\\it toroidal} field -- the result of dynamo action triggered by the significant but still relatively weak vertical ","authors_text":"Jason Dexter, Mitchell C. Begelman, Nicolas Scepi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-03T18:01:15Z","title":"What really makes an accretion disc MAD"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.02439","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:eac3a4ab67d0151a5d448aa7116a171511ab1394d50162eaabdcdc4ac59ba049","target":"record","created_at":"2026-07-05T03:56:51Z","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":"1062055e4159461e04bb9af43d195297f9791bc06571185155ee47b3c9a9a5c4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-03T18:01:15Z","title_canon_sha256":"bc0abc2f76350987b66d661fd396e0dba548f74363964a7a3057d9f85ecb06d2"},"schema_version":"1.0","source":{"id":"2111.02439","kind":"arxiv","version":2}},"canonical_sha256":"9ef21f8e87f95de1d174400db749e78b68a56afb1ef252eb8491be4d708458a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ef21f8e87f95de1d174400db749e78b68a56afb1ef252eb8491be4d708458a6","first_computed_at":"2026-07-05T03:56:51.800586Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:56:51.800586Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"27sSS9aOGDZph/Kzk93LVXD3INIHpj4TGSJWnI6G4h6zRRdjesYVnkncb3D4Rw7V1coItwFe3vMaFFMkaz7yCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:56:51.801092Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.02439","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eac3a4ab67d0151a5d448aa7116a171511ab1394d50162eaabdcdc4ac59ba049","sha256:aeba859fcd73f3d6a2291124e5a08b39247f2f5302ae82134ab7e25e88c7e19c"],"state_sha256":"74274011dd2b11f16a8980ae5e458c6b7d3c85f2d0f9c0845663bc829dc2a95c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6s69J59UxPFD4/8nTeuQVNHUSqdfJYmTmHVtz3LD0p778hIki5kE+l48ADb5igdAaKlvBZ7y3mnMxZdhWllTCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T09:11:13.676187Z","bundle_sha256":"146a9d7adf392dbf03b33a6238d0dd5326079c3ce101f77c412c25b4ca0888fd"}}