{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:KEG6K67HUGQO3DXP7MNCPW4SHC","short_pith_number":"pith:KEG6K67H","canonical_record":{"source":{"id":"1105.3653","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-05-18T14:45:21Z","cross_cats_sorted":[],"title_canon_sha256":"65cd6911dbd8e8ca313f520fc263dd30045f21d28fdafb48337d5b0c6f47b13d","abstract_canon_sha256":"eafcce6852f29d94d0b4b16efe2e09146e72e7a612c3349d746707c4285f3fc8"},"schema_version":"1.0"},"canonical_sha256":"510de57be7a1a0ed8eeffb1a27db9238b4cd4a3052568b803b9251e87a824ca2","source":{"kind":"arxiv","id":"1105.3653","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.3653","created_at":"2026-05-18T02:01:56Z"},{"alias_kind":"arxiv_version","alias_value":"1105.3653v1","created_at":"2026-05-18T02:01:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.3653","created_at":"2026-05-18T02:01:56Z"},{"alias_kind":"pith_short_12","alias_value":"KEG6K67HUGQO","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"KEG6K67HUGQO3DXP","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"KEG6K67H","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:KEG6K67HUGQO3DXP7MNCPW4SHC","target":"record","payload":{"canonical_record":{"source":{"id":"1105.3653","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-05-18T14:45:21Z","cross_cats_sorted":[],"title_canon_sha256":"65cd6911dbd8e8ca313f520fc263dd30045f21d28fdafb48337d5b0c6f47b13d","abstract_canon_sha256":"eafcce6852f29d94d0b4b16efe2e09146e72e7a612c3349d746707c4285f3fc8"},"schema_version":"1.0"},"canonical_sha256":"510de57be7a1a0ed8eeffb1a27db9238b4cd4a3052568b803b9251e87a824ca2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:56.529656Z","signature_b64":"NBr9aNbICtiKQPmXwOdXDO/NXS53UWhE+6QeT9BZWsoSkDhyJKkzTg4uz7u3lnknHoAZ4Ox89l46ofnfjPN4DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"510de57be7a1a0ed8eeffb1a27db9238b4cd4a3052568b803b9251e87a824ca2","last_reissued_at":"2026-05-18T02:01:56.528996Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:56.528996Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1105.3653","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":"2026-05-18T02:01:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GT0KEcCPQ+NQRvuWZ8KMimZj0HxbU5vIErPteeAS5WaUAsvPQdg0H5EqdBpHprNyrb4apNIuvcvtGumhNdL6BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:04:55.525788Z"},"content_sha256":"ee0f8637cbf8fe05fe9eec83681d7c87b01f71d6b4b4952a783e13ae8fe28818","schema_version":"1.0","event_id":"sha256:ee0f8637cbf8fe05fe9eec83681d7c87b01f71d6b4b4952a783e13ae8fe28818"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:KEG6K67HUGQO3DXP7MNCPW4SHC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Blindly Detecting Merging Supermassive Black Holes with Radio Surveys","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alberto Sesana, David L. Kaplan, Marta Volonteri, Richard O'Shaughnessy","submitted_at":"2011-05-18T14:45:21Z","abstract_excerpt":"Supermassive black holes presumably grow through numerous mergers throughout cosmic time. During each merger, supermassive black hole binaries are surrounded by a circumbinary accretion disk that imposes a significant (~1e4 G for a binary of 1e8 Msun) magnetic field. The motion of the binary through that field will convert the field energy to Poynting flux, with a luminosity ~1e43 erg/s (B/1e4 G)^2 (M/1e8 Msun)^2, some of which may emerge as synchrotron emission at frequencies near 1 GHz where current and planned wide-field radio surveys will operate. We find that the short timescales of many "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.3653","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":"2026-05-18T02:01:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LH8tjJCPGuNl3fqB52TsnMeFXqtucEsSxU0LhggnxjcNCQNqpUy7Jv5mXfjVAx5t1X6m3VNnLO7rGNz2j4IfDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:04:55.526132Z"},"content_sha256":"b81b29052f16a66d18b6695b622a0ede81bd10e47f213cd905e1f361d126e911","schema_version":"1.0","event_id":"sha256:b81b29052f16a66d18b6695b622a0ede81bd10e47f213cd905e1f361d126e911"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KEG6K67HUGQO3DXP7MNCPW4SHC/bundle.json","state_url":"https://pith.science/pith/KEG6K67HUGQO3DXP7MNCPW4SHC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KEG6K67HUGQO3DXP7MNCPW4SHC/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":"2026-06-02T02:04:55Z","links":{"resolver":"https://pith.science/pith/KEG6K67HUGQO3DXP7MNCPW4SHC","bundle":"https://pith.science/pith/KEG6K67HUGQO3DXP7MNCPW4SHC/bundle.json","state":"https://pith.science/pith/KEG6K67HUGQO3DXP7MNCPW4SHC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KEG6K67HUGQO3DXP7MNCPW4SHC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:KEG6K67HUGQO3DXP7MNCPW4SHC","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":"eafcce6852f29d94d0b4b16efe2e09146e72e7a612c3349d746707c4285f3fc8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-05-18T14:45:21Z","title_canon_sha256":"65cd6911dbd8e8ca313f520fc263dd30045f21d28fdafb48337d5b0c6f47b13d"},"schema_version":"1.0","source":{"id":"1105.3653","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.3653","created_at":"2026-05-18T02:01:56Z"},{"alias_kind":"arxiv_version","alias_value":"1105.3653v1","created_at":"2026-05-18T02:01:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.3653","created_at":"2026-05-18T02:01:56Z"},{"alias_kind":"pith_short_12","alias_value":"KEG6K67HUGQO","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"KEG6K67HUGQO3DXP","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"KEG6K67H","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:b81b29052f16a66d18b6695b622a0ede81bd10e47f213cd905e1f361d126e911","target":"graph","created_at":"2026-05-18T02:01:56Z","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":"Supermassive black holes presumably grow through numerous mergers throughout cosmic time. During each merger, supermassive black hole binaries are surrounded by a circumbinary accretion disk that imposes a significant (~1e4 G for a binary of 1e8 Msun) magnetic field. The motion of the binary through that field will convert the field energy to Poynting flux, with a luminosity ~1e43 erg/s (B/1e4 G)^2 (M/1e8 Msun)^2, some of which may emerge as synchrotron emission at frequencies near 1 GHz where current and planned wide-field radio surveys will operate. We find that the short timescales of many ","authors_text":"Alberto Sesana, David L. Kaplan, Marta Volonteri, Richard O'Shaughnessy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-05-18T14:45:21Z","title":"Blindly Detecting Merging Supermassive Black Holes with Radio Surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.3653","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:ee0f8637cbf8fe05fe9eec83681d7c87b01f71d6b4b4952a783e13ae8fe28818","target":"record","created_at":"2026-05-18T02:01:56Z","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":"eafcce6852f29d94d0b4b16efe2e09146e72e7a612c3349d746707c4285f3fc8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-05-18T14:45:21Z","title_canon_sha256":"65cd6911dbd8e8ca313f520fc263dd30045f21d28fdafb48337d5b0c6f47b13d"},"schema_version":"1.0","source":{"id":"1105.3653","kind":"arxiv","version":1}},"canonical_sha256":"510de57be7a1a0ed8eeffb1a27db9238b4cd4a3052568b803b9251e87a824ca2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"510de57be7a1a0ed8eeffb1a27db9238b4cd4a3052568b803b9251e87a824ca2","first_computed_at":"2026-05-18T02:01:56.528996Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:56.528996Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NBr9aNbICtiKQPmXwOdXDO/NXS53UWhE+6QeT9BZWsoSkDhyJKkzTg4uz7u3lnknHoAZ4Ox89l46ofnfjPN4DA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:56.529656Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.3653","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee0f8637cbf8fe05fe9eec83681d7c87b01f71d6b4b4952a783e13ae8fe28818","sha256:b81b29052f16a66d18b6695b622a0ede81bd10e47f213cd905e1f361d126e911"],"state_sha256":"44b2c3112d34016c7c2ac993d2aa50f22de86be88ec7246ea7021d272a3cc952"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KcMzVQiCyG7iGyvAkblKuSn0F4VVeuSdbuMYqVhbtqWTjOzOePmDEOVzWt4X2+YbG7QxE0fHNbDRzUBm5h0BBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T02:04:55.528018Z","bundle_sha256":"224d2ca7970d23d18b319469a464f459bfe52b5d2052639ab5a5cc37c15bb821"}}