{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:6PFCVHCQWK4YHCKWMZ32YNETMT","short_pith_number":"pith:6PFCVHCQ","canonical_record":{"source":{"id":"2002.04055","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-02-10T19:18:14Z","cross_cats_sorted":["astro-ph.HE","hep-ph","hep-th"],"title_canon_sha256":"a7264b532917e26563ccebb2217327417c1e5297f806c101b15a407f27f44dd1","abstract_canon_sha256":"6b8c6520533476f051fd2d557b2574b827ca4827ac01b5eed8081fe357a523a6"},"schema_version":"1.0"},"canonical_sha256":"f3ca2a9c50b2b98389566677ac349364e676bc1df28487ef27b173e5fa169051","source":{"kind":"arxiv","id":"2002.04055","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.04055","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"arxiv_version","alias_value":"2002.04055v3","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.04055","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"pith_short_12","alias_value":"6PFCVHCQWK4Y","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"pith_short_16","alias_value":"6PFCVHCQWK4YHCKW","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"pith_short_8","alias_value":"6PFCVHCQ","created_at":"2026-07-05T01:07:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:6PFCVHCQWK4YHCKWMZ32YNETMT","target":"record","payload":{"canonical_record":{"source":{"id":"2002.04055","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-02-10T19:18:14Z","cross_cats_sorted":["astro-ph.HE","hep-ph","hep-th"],"title_canon_sha256":"a7264b532917e26563ccebb2217327417c1e5297f806c101b15a407f27f44dd1","abstract_canon_sha256":"6b8c6520533476f051fd2d557b2574b827ca4827ac01b5eed8081fe357a523a6"},"schema_version":"1.0"},"canonical_sha256":"f3ca2a9c50b2b98389566677ac349364e676bc1df28487ef27b173e5fa169051","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:07:39.779832Z","signature_b64":"uAhGXFwGm4a8k3DzvYSzInxYNTfqvLL9Bi/o+Q9h9S4f0i1G7/tsBoHYzhzwWWzZ9+nynveFeGVZY78B2CpOAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3ca2a9c50b2b98389566677ac349364e676bc1df28487ef27b173e5fa169051","last_reissued_at":"2026-07-05T01:07:39.779357Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:07:39.779357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.04055","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:07:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4phMMApjDk7Y/axUwHzYF/0RrzdcIQGrrHPeBoMAKxnxPI+MW4aXEe+/iJddbkodWQ0+Kk4qdAzf/SgzdENnCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T04:51:35.383666Z"},"content_sha256":"ef474243f32878955124964b289dd4d352a8c21b5918f6afcd2abd1bdf63f622","schema_version":"1.0","event_id":"sha256:ef474243f32878955124964b289dd4d352a8c21b5918f6afcd2abd1bdf63f622"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:6PFCVHCQWK4YHCKWMZ32YNETMT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Black hole superradiant instability from ultralight spin-2 fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-ph","hep-th"],"primary_cat":"gr-qc","authors_text":"Paolo Pani, Richard Brito, Sara Grillo","submitted_at":"2020-02-10T19:18:14Z","abstract_excerpt":"Ultralight bosonic fields are compelling dark-matter candidates and arise in a variety of beyond-Standard-Model scenarios. These fields can tap energy and angular momentum from spinning black holes through superradiant instabilities, during which a macroscopic bosonic condensate develops around the black hole. Striking features of this phenomenon include gaps in the spin-mass distribution of astrophysical black holes and a continuous gravitational-wave~(GW) signal emitted by the condensate. So far these processes have been studied in great detail for scalar fields and, more recently, for vecto"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.04055","kind":"arxiv","version":3},"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/2002.04055/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":"2026-07-05T01:07:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hMFKp8PTaDw8pQzrao4N3pD//5EzMDrRk9TzhggsO/r/qeg7r6cjE3LwQy90kZzIQV983fjUwGqbBUvZHNfgCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T04:51:35.384035Z"},"content_sha256":"455cd812d461dcf0282ff21ea71d642ab111463d6a5771cc3b21a56d240f3559","schema_version":"1.0","event_id":"sha256:455cd812d461dcf0282ff21ea71d642ab111463d6a5771cc3b21a56d240f3559"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6PFCVHCQWK4YHCKWMZ32YNETMT/bundle.json","state_url":"https://pith.science/pith/6PFCVHCQWK4YHCKWMZ32YNETMT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6PFCVHCQWK4YHCKWMZ32YNETMT/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":"2026-07-09T04:51:35Z","links":{"resolver":"https://pith.science/pith/6PFCVHCQWK4YHCKWMZ32YNETMT","bundle":"https://pith.science/pith/6PFCVHCQWK4YHCKWMZ32YNETMT/bundle.json","state":"https://pith.science/pith/6PFCVHCQWK4YHCKWMZ32YNETMT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6PFCVHCQWK4YHCKWMZ32YNETMT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:6PFCVHCQWK4YHCKWMZ32YNETMT","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":"6b8c6520533476f051fd2d557b2574b827ca4827ac01b5eed8081fe357a523a6","cross_cats_sorted":["astro-ph.HE","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-02-10T19:18:14Z","title_canon_sha256":"a7264b532917e26563ccebb2217327417c1e5297f806c101b15a407f27f44dd1"},"schema_version":"1.0","source":{"id":"2002.04055","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.04055","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"arxiv_version","alias_value":"2002.04055v3","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.04055","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"pith_short_12","alias_value":"6PFCVHCQWK4Y","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"pith_short_16","alias_value":"6PFCVHCQWK4YHCKW","created_at":"2026-07-05T01:07:39Z"},{"alias_kind":"pith_short_8","alias_value":"6PFCVHCQ","created_at":"2026-07-05T01:07:39Z"}],"graph_snapshots":[{"event_id":"sha256:455cd812d461dcf0282ff21ea71d642ab111463d6a5771cc3b21a56d240f3559","target":"graph","created_at":"2026-07-05T01:07:39Z","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/2002.04055/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultralight bosonic fields are compelling dark-matter candidates and arise in a variety of beyond-Standard-Model scenarios. These fields can tap energy and angular momentum from spinning black holes through superradiant instabilities, during which a macroscopic bosonic condensate develops around the black hole. Striking features of this phenomenon include gaps in the spin-mass distribution of astrophysical black holes and a continuous gravitational-wave~(GW) signal emitted by the condensate. So far these processes have been studied in great detail for scalar fields and, more recently, for vecto","authors_text":"Paolo Pani, Richard Brito, Sara Grillo","cross_cats":["astro-ph.HE","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-02-10T19:18:14Z","title":"Black hole superradiant instability from ultralight spin-2 fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.04055","kind":"arxiv","version":3},"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:ef474243f32878955124964b289dd4d352a8c21b5918f6afcd2abd1bdf63f622","target":"record","created_at":"2026-07-05T01:07:39Z","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":"6b8c6520533476f051fd2d557b2574b827ca4827ac01b5eed8081fe357a523a6","cross_cats_sorted":["astro-ph.HE","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-02-10T19:18:14Z","title_canon_sha256":"a7264b532917e26563ccebb2217327417c1e5297f806c101b15a407f27f44dd1"},"schema_version":"1.0","source":{"id":"2002.04055","kind":"arxiv","version":3}},"canonical_sha256":"f3ca2a9c50b2b98389566677ac349364e676bc1df28487ef27b173e5fa169051","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3ca2a9c50b2b98389566677ac349364e676bc1df28487ef27b173e5fa169051","first_computed_at":"2026-07-05T01:07:39.779357Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:07:39.779357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uAhGXFwGm4a8k3DzvYSzInxYNTfqvLL9Bi/o+Q9h9S4f0i1G7/tsBoHYzhzwWWzZ9+nynveFeGVZY78B2CpOAg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:07:39.779832Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.04055","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ef474243f32878955124964b289dd4d352a8c21b5918f6afcd2abd1bdf63f622","sha256:455cd812d461dcf0282ff21ea71d642ab111463d6a5771cc3b21a56d240f3559"],"state_sha256":"ed9f065e73e703f7964ef3713064a9cf7a27407e5d43155768723c4a90c6d889"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MIvY9Sjp0V7rFNxDGLpqWvGMISSr9lrUEz7pMUXbr2n5FGKnuZzz4J5cQxRaRXkDQ30Wwd1GD8/NKYH6kjHLCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T04:51:35.386009Z","bundle_sha256":"0e7de34a27d2cac8d8494cf71b5a5d4b7705b686b8ad10ffc62332b35272f554"}}