{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:D43FUQCUAYWTRE3URM7MXP4FUT","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":"39e7141dc9fdf9f4de40c866d25225f6a1cd59250d01fde09f29938968e542e8","cross_cats_sorted":["hep-th","math.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-26T14:53:25Z","title_canon_sha256":"8728c61b09f8087d209ce033a065174f2b1a75115212ab348c99dd18ae5c9f68"},"schema_version":"1.0","source":{"id":"1809.10037","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.10037","created_at":"2026-05-18T00:04:38Z"},{"alias_kind":"arxiv_version","alias_value":"1809.10037v1","created_at":"2026-05-18T00:04:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.10037","created_at":"2026-05-18T00:04:38Z"},{"alias_kind":"pith_short_12","alias_value":"D43FUQCUAYWT","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"D43FUQCUAYWTRE3U","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"D43FUQCU","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:3d78ce4e529c5b3f7ca68807b557d40e9a6064689d6b69eed91f9ece4b9d877c","target":"graph","created_at":"2026-05-18T00:04:38Z","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":"It is shown that the conserved charges on the event horizon and the Cauchy horizon associated to scalar perturbations on extremal black holes are externally measurable from null infinity. This suggests that these charges have the potential to serve as an observational signature. The proof of this result is based on obtaining precise late-time asymptotics for the radiation field of outgoing perturbations.","authors_text":"Dejan Gajic, Stefanos Aretakis, Yannis Angelopoulos","cross_cats":["hep-th","math.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-26T14:53:25Z","title":"Horizon hair of extremal black holes and measurements at null infinity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.10037","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:f3a261f3adf145b7458b927b23a85426a505eeee5c3ea265c5d7e9e48fd75196","target":"record","created_at":"2026-05-18T00:04:38Z","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":"39e7141dc9fdf9f4de40c866d25225f6a1cd59250d01fde09f29938968e542e8","cross_cats_sorted":["hep-th","math.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-09-26T14:53:25Z","title_canon_sha256":"8728c61b09f8087d209ce033a065174f2b1a75115212ab348c99dd18ae5c9f68"},"schema_version":"1.0","source":{"id":"1809.10037","kind":"arxiv","version":1}},"canonical_sha256":"1f365a4054062d3893748b3ecbbf85a4f6602ad5b4873863673e489f1ec54dbb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f365a4054062d3893748b3ecbbf85a4f6602ad5b4873863673e489f1ec54dbb","first_computed_at":"2026-05-18T00:04:38.964890Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:38.964890Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OVeLbuYLU1fN+TdD9OGo+CD9DWg65CkMNvJ84AuCsYciXEBsFvLzhgY3Vi3qdbguViRVu96KXAcQtCDfls1PDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:38.965346Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.10037","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f3a261f3adf145b7458b927b23a85426a505eeee5c3ea265c5d7e9e48fd75196","sha256:3d78ce4e529c5b3f7ca68807b557d40e9a6064689d6b69eed91f9ece4b9d877c"],"state_sha256":"31aa6de5f1b8477c37f0912dbb112153c0cc38e50d1c9ad205387e795e19960f"}