{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:TONEVI2YX5UP5SCSZTG6ZYVWDK","short_pith_number":"pith:TONEVI2Y","canonical_record":{"source":{"id":"astro-ph/0504351","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-15T14:44:36Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"cd155fcec0d640c75be41d81824b4c658d49f6a6a51bf18dcd3767d338554cab","abstract_canon_sha256":"5315a5b225e90a6b1a735ea21cf6769ce5bc91358a7168bdcb931f7047aad2b3"},"schema_version":"1.0"},"canonical_sha256":"9b9a4aa358bf68fec852cccdece2b61abc6fbfb678bc6c2a1b8d692bfb08f43a","source":{"kind":"arxiv","id":"astro-ph/0504351","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0504351","created_at":"2026-05-18T00:42:24Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0504351v3","created_at":"2026-05-18T00:42:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0504351","created_at":"2026-05-18T00:42:24Z"},{"alias_kind":"pith_short_12","alias_value":"TONEVI2YX5UP","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"TONEVI2YX5UP5SCS","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"TONEVI2Y","created_at":"2026-05-18T12:25:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:TONEVI2YX5UP5SCSZTG6ZYVWDK","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0504351","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-15T14:44:36Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"cd155fcec0d640c75be41d81824b4c658d49f6a6a51bf18dcd3767d338554cab","abstract_canon_sha256":"5315a5b225e90a6b1a735ea21cf6769ce5bc91358a7168bdcb931f7047aad2b3"},"schema_version":"1.0"},"canonical_sha256":"9b9a4aa358bf68fec852cccdece2b61abc6fbfb678bc6c2a1b8d692bfb08f43a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:24.292781Z","signature_b64":"s5AobHRHWiRCJFQesvZHv0FjTxZOdPVLkNeTmRPf8mts1wOuPjs+H1Dw/l/SWwfuuqXz6yyLkgYdxu8mCnxdDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9b9a4aa358bf68fec852cccdece2b61abc6fbfb678bc6c2a1b8d692bfb08f43a","last_reissued_at":"2026-05-18T00:42:24.292392Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:24.292392Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0504351","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":"2026-05-18T00:42:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JaSKJGrm7fxL0PSD/7ymcv/mJIdTdRjIwV8e3fMFXh879Rh1GcRyh/iigbadiyQpCeBVMwZ4O5JJPeBPLwIYAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T11:00:31.958129Z"},"content_sha256":"4f74bcd7f5a0eace299962a544b83bea3cb14735949344f4ec7b5199cc87c213","schema_version":"1.0","event_id":"sha256:4f74bcd7f5a0eace299962a544b83bea3cb14735949344f4ec7b5199cc87c213"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:TONEVI2YX5UP5SCSZTG6ZYVWDK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A comparison of superradiance and negative-phase-velocity phenomenons in the ergosphere of a rotating black hole","license":"","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph","authors_text":"Akhlesh Lakhtakia (Pennsylvania State University), Sandi Setiawan (University of Edinburgh), Tom G. Mackay (University of Edinburgh)","submitted_at":"2005-04-15T14:44:36Z","abstract_excerpt":"The propagation of electromagnetic plane waves with negative phase velocity (NPV) in the ergosphere of a rotating black hole has recently been reported. A comparison of NPV propagation and superradiance is presented. We show that, although both phenomenons involve negative energy densities, there are two significant differences between them."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0504351","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":""},"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":"2026-05-18T00:42:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M/blSUyt0bAZXzRancdRnx14MPIwQ3Kis2jFbtRmT8II6PLAxmleSJ0GzpbRJsgFklDqSybdp7G/YIgRPmDQCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T11:00:31.958719Z"},"content_sha256":"fcef526e0f284217a1e523308541a6932348a03066176e6eb52a8595f35db34e","schema_version":"1.0","event_id":"sha256:fcef526e0f284217a1e523308541a6932348a03066176e6eb52a8595f35db34e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TONEVI2YX5UP5SCSZTG6ZYVWDK/bundle.json","state_url":"https://pith.science/pith/TONEVI2YX5UP5SCSZTG6ZYVWDK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TONEVI2YX5UP5SCSZTG6ZYVWDK/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":"2026-06-07T11:00:31Z","links":{"resolver":"https://pith.science/pith/TONEVI2YX5UP5SCSZTG6ZYVWDK","bundle":"https://pith.science/pith/TONEVI2YX5UP5SCSZTG6ZYVWDK/bundle.json","state":"https://pith.science/pith/TONEVI2YX5UP5SCSZTG6ZYVWDK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TONEVI2YX5UP5SCSZTG6ZYVWDK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:TONEVI2YX5UP5SCSZTG6ZYVWDK","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":"5315a5b225e90a6b1a735ea21cf6769ce5bc91358a7168bdcb931f7047aad2b3","cross_cats_sorted":["gr-qc","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-15T14:44:36Z","title_canon_sha256":"cd155fcec0d640c75be41d81824b4c658d49f6a6a51bf18dcd3767d338554cab"},"schema_version":"1.0","source":{"id":"astro-ph/0504351","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0504351","created_at":"2026-05-18T00:42:24Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0504351v3","created_at":"2026-05-18T00:42:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0504351","created_at":"2026-05-18T00:42:24Z"},{"alias_kind":"pith_short_12","alias_value":"TONEVI2YX5UP","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"TONEVI2YX5UP5SCS","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"TONEVI2Y","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:fcef526e0f284217a1e523308541a6932348a03066176e6eb52a8595f35db34e","target":"graph","created_at":"2026-05-18T00:42:24Z","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":"The propagation of electromagnetic plane waves with negative phase velocity (NPV) in the ergosphere of a rotating black hole has recently been reported. A comparison of NPV propagation and superradiance is presented. We show that, although both phenomenons involve negative energy densities, there are two significant differences between them.","authors_text":"Akhlesh Lakhtakia (Pennsylvania State University), Sandi Setiawan (University of Edinburgh), Tom G. Mackay (University of Edinburgh)","cross_cats":["gr-qc","hep-th"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-04-15T14:44:36Z","title":"A comparison of superradiance and negative-phase-velocity phenomenons in the ergosphere of a rotating black hole"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0504351","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":"sha256:4f74bcd7f5a0eace299962a544b83bea3cb14735949344f4ec7b5199cc87c213","target":"record","created_at":"2026-05-18T00:42:24Z","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":"5315a5b225e90a6b1a735ea21cf6769ce5bc91358a7168bdcb931f7047aad2b3","cross_cats_sorted":["gr-qc","hep-th"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-04-15T14:44:36Z","title_canon_sha256":"cd155fcec0d640c75be41d81824b4c658d49f6a6a51bf18dcd3767d338554cab"},"schema_version":"1.0","source":{"id":"astro-ph/0504351","kind":"arxiv","version":3}},"canonical_sha256":"9b9a4aa358bf68fec852cccdece2b61abc6fbfb678bc6c2a1b8d692bfb08f43a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9b9a4aa358bf68fec852cccdece2b61abc6fbfb678bc6c2a1b8d692bfb08f43a","first_computed_at":"2026-05-18T00:42:24.292392Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:24.292392Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s5AobHRHWiRCJFQesvZHv0FjTxZOdPVLkNeTmRPf8mts1wOuPjs+H1Dw/l/SWwfuuqXz6yyLkgYdxu8mCnxdDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:24.292781Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0504351","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4f74bcd7f5a0eace299962a544b83bea3cb14735949344f4ec7b5199cc87c213","sha256:fcef526e0f284217a1e523308541a6932348a03066176e6eb52a8595f35db34e"],"state_sha256":"575c03c1dc0b5b44360df044c3ab62a98902bc3eefcea4db989c196d014102c3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JU7RDYrQ783H2WtJA6MJR9cxYzCLXxSRGmLJVOqqyfuAtbo1d6+Jcwes1fl+ax3MMz5uw4FK55gwC4Ok7dqQCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T11:00:31.961604Z","bundle_sha256":"f39c0aad706bf0b7ddc6a6f913846b7a4355d648b9ae263b2d93839f3c5bb605"}}