{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SWC4BPPEZO27OCAZHYXVMIC5KR","short_pith_number":"pith:SWC4BPPE","canonical_record":{"source":{"id":"1909.05256","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-11T18:00:00Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"b06d0c7e82e0935b794bf6acd0d8f71e513e7a5f4cce14d4af92d705f0a1a648","abstract_canon_sha256":"f11931e8d03a4c2824431b7a21bc3848a99c44fdc19d973de7c14588e5b36c0e"},"schema_version":"1.0"},"canonical_sha256":"9585c0bde4cbb5f708193e2f56205d5468b1534d2c208cc76acd1d10a1e46c2c","source":{"kind":"arxiv","id":"1909.05256","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.05256","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"1909.05256v2","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.05256","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"SWC4BPPEZO27","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"pith_short_16","alias_value":"SWC4BPPEZO27OCAZ","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"pith_short_8","alias_value":"SWC4BPPE","created_at":"2026-07-05T01:23:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SWC4BPPEZO27OCAZHYXVMIC5KR","target":"record","payload":{"canonical_record":{"source":{"id":"1909.05256","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-11T18:00:00Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"b06d0c7e82e0935b794bf6acd0d8f71e513e7a5f4cce14d4af92d705f0a1a648","abstract_canon_sha256":"f11931e8d03a4c2824431b7a21bc3848a99c44fdc19d973de7c14588e5b36c0e"},"schema_version":"1.0"},"canonical_sha256":"9585c0bde4cbb5f708193e2f56205d5468b1534d2c208cc76acd1d10a1e46c2c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:23:22.255592Z","signature_b64":"rn7W7FIcPKFui6wKHemVBX9lxlohYQUOHafOiNOXE9sMllQKZnNuEsTA1AWGh6PGpfC2TWp9pLDruie148kpAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9585c0bde4cbb5f708193e2f56205d5468b1534d2c208cc76acd1d10a1e46c2c","last_reissued_at":"2026-07-05T01:23:22.255170Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:23:22.255170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.05256","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":"2026-07-05T01:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IwQmWJZT04GWuOsB5Mk4AKPnO7lbm0NRXPmazIWIsZNmjjM4zxj7ufpYmxO+dHbWpvAnwDILkux84WOHPTK0Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:06:00.436207Z"},"content_sha256":"dc37b7cae482c99682c1f71f0620a0e46b6700375b3ca50c482440d2bfb1c36d","schema_version":"1.0","event_id":"sha256:dc37b7cae482c99682c1f71f0620a0e46b6700375b3ca50c482440d2bfb1c36d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SWC4BPPEZO27OCAZHYXVMIC5KR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical analogues to the Kerr-Newman black hole","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"gr-qc","authors_text":"Andrew P. Turner, R. A. Tinguely","submitted_at":"2019-09-11T18:00:00Z","abstract_excerpt":"Optical analogues to black holes allow the investigation of general relativity in a laboratory setting. Previous works have considered analogues to Schwarzschild black holes in an isotropic coordinate system; the major drawback is that required material properties diverge at the horizon. We present the dielectric permittivity and permeability tensors that exactly reproduce the equatorial Kerr-Newman metric, as well as the gradient-index material that reproduces equatorial Kerr-Newman null geodesics. Importantly, the radial profile of the scalar refractive index is finite along all trajectories"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.05256","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/1909.05256/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":"2026-07-05T01:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5PoqfLiTOIBlKiCMnspZmm8t96hirqrYx8nimgHmdlCJRtwjnKdkoc+XdRzPtewctUE8quto23/TpM7UG/GvAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T12:06:00.436754Z"},"content_sha256":"22e6118f8916c6d29f76423a337701fb8def0acfada33b6fda3c65f9af66499b","schema_version":"1.0","event_id":"sha256:22e6118f8916c6d29f76423a337701fb8def0acfada33b6fda3c65f9af66499b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SWC4BPPEZO27OCAZHYXVMIC5KR/bundle.json","state_url":"https://pith.science/pith/SWC4BPPEZO27OCAZHYXVMIC5KR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SWC4BPPEZO27OCAZHYXVMIC5KR/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":"2026-08-01T12:06:00Z","links":{"resolver":"https://pith.science/pith/SWC4BPPEZO27OCAZHYXVMIC5KR","bundle":"https://pith.science/pith/SWC4BPPEZO27OCAZHYXVMIC5KR/bundle.json","state":"https://pith.science/pith/SWC4BPPEZO27OCAZHYXVMIC5KR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SWC4BPPEZO27OCAZHYXVMIC5KR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SWC4BPPEZO27OCAZHYXVMIC5KR","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":"f11931e8d03a4c2824431b7a21bc3848a99c44fdc19d973de7c14588e5b36c0e","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-11T18:00:00Z","title_canon_sha256":"b06d0c7e82e0935b794bf6acd0d8f71e513e7a5f4cce14d4af92d705f0a1a648"},"schema_version":"1.0","source":{"id":"1909.05256","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.05256","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"1909.05256v2","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.05256","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"SWC4BPPEZO27","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"pith_short_16","alias_value":"SWC4BPPEZO27OCAZ","created_at":"2026-07-05T01:23:22Z"},{"alias_kind":"pith_short_8","alias_value":"SWC4BPPE","created_at":"2026-07-05T01:23:22Z"}],"graph_snapshots":[{"event_id":"sha256:22e6118f8916c6d29f76423a337701fb8def0acfada33b6fda3c65f9af66499b","target":"graph","created_at":"2026-07-05T01:23:22Z","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/1909.05256/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Optical analogues to black holes allow the investigation of general relativity in a laboratory setting. Previous works have considered analogues to Schwarzschild black holes in an isotropic coordinate system; the major drawback is that required material properties diverge at the horizon. We present the dielectric permittivity and permeability tensors that exactly reproduce the equatorial Kerr-Newman metric, as well as the gradient-index material that reproduces equatorial Kerr-Newman null geodesics. Importantly, the radial profile of the scalar refractive index is finite along all trajectories","authors_text":"Andrew P. Turner, R. A. Tinguely","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-11T18:00:00Z","title":"Optical analogues to the Kerr-Newman black hole"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.05256","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:dc37b7cae482c99682c1f71f0620a0e46b6700375b3ca50c482440d2bfb1c36d","target":"record","created_at":"2026-07-05T01:23:22Z","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":"f11931e8d03a4c2824431b7a21bc3848a99c44fdc19d973de7c14588e5b36c0e","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-09-11T18:00:00Z","title_canon_sha256":"b06d0c7e82e0935b794bf6acd0d8f71e513e7a5f4cce14d4af92d705f0a1a648"},"schema_version":"1.0","source":{"id":"1909.05256","kind":"arxiv","version":2}},"canonical_sha256":"9585c0bde4cbb5f708193e2f56205d5468b1534d2c208cc76acd1d10a1e46c2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9585c0bde4cbb5f708193e2f56205d5468b1534d2c208cc76acd1d10a1e46c2c","first_computed_at":"2026-07-05T01:23:22.255170Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:23:22.255170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rn7W7FIcPKFui6wKHemVBX9lxlohYQUOHafOiNOXE9sMllQKZnNuEsTA1AWGh6PGpfC2TWp9pLDruie148kpAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:23:22.255592Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.05256","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc37b7cae482c99682c1f71f0620a0e46b6700375b3ca50c482440d2bfb1c36d","sha256:22e6118f8916c6d29f76423a337701fb8def0acfada33b6fda3c65f9af66499b"],"state_sha256":"a5a955a6eb1681ad5602198d5cb998084cedd102ef15158cc02fe9287a91beca"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UI6S8qULx7afNvOVpC/UZc+Y4dxIy0bgw3fKHixXe+2BvFuZRVFLBZd8j9tBa23efXa5td9QK7aWam+AgnPUBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T12:06:00.445726Z","bundle_sha256":"7012b4e33baf62dffa0988cf6e1e01d67e33153f433390ece6a9bb0ce76f656e"}}