{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:62WA6OSNOKPSBL5QDX2TJFOAHJ","short_pith_number":"pith:62WA6OSN","canonical_record":{"source":{"id":"1807.04762","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-07-12T18:00:07Z","cross_cats_sorted":[],"title_canon_sha256":"f1ffa220c0d0567cec4c242aec2976bcf6502af07d9cf59c8a0bbf24921af061","abstract_canon_sha256":"d95ed723352537b6b851a477cfbd101d641d4683322572ddbaf456051b1b1fcb"},"schema_version":"1.0"},"canonical_sha256":"f6ac0f3a4d729f20afb01df53495c03a68b639c2bd4140773711b2fb8afed5b5","source":{"kind":"arxiv","id":"1807.04762","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.04762","created_at":"2026-05-17T23:59:52Z"},{"alias_kind":"arxiv_version","alias_value":"1807.04762v2","created_at":"2026-05-17T23:59:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.04762","created_at":"2026-05-17T23:59:52Z"},{"alias_kind":"pith_short_12","alias_value":"62WA6OSNOKPS","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"62WA6OSNOKPSBL5Q","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"62WA6OSN","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:62WA6OSNOKPSBL5QDX2TJFOAHJ","target":"record","payload":{"canonical_record":{"source":{"id":"1807.04762","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-07-12T18:00:07Z","cross_cats_sorted":[],"title_canon_sha256":"f1ffa220c0d0567cec4c242aec2976bcf6502af07d9cf59c8a0bbf24921af061","abstract_canon_sha256":"d95ed723352537b6b851a477cfbd101d641d4683322572ddbaf456051b1b1fcb"},"schema_version":"1.0"},"canonical_sha256":"f6ac0f3a4d729f20afb01df53495c03a68b639c2bd4140773711b2fb8afed5b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:52.267716Z","signature_b64":"ycs82ecQINVFiR4H3d57WuzUV6h3YkxhxNT3ZNMLn/AEo08ov/ifUEqrR3QI7ztHLp4+NjpfHYSCEDGPJBpmBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6ac0f3a4d729f20afb01df53495c03a68b639c2bd4140773711b2fb8afed5b5","last_reissued_at":"2026-05-17T23:59:52.267168Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:52.267168Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.04762","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":"2026-05-17T23:59:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hcGe26xrI4fXQlsN/TNyyFwntxcuXQR1FbA54PK5dRgaMJe7Y9JcOgvyaVXb7XmL38FAnupFmcRwHxnP/pk1DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T07:05:15.864759Z"},"content_sha256":"d960c2c15758fb34fbbac0024674d494326be8652120068042528ba8479b25b3","schema_version":"1.0","event_id":"sha256:d960c2c15758fb34fbbac0024674d494326be8652120068042528ba8479b25b3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:62WA6OSNOKPSBL5QDX2TJFOAHJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral lines of extreme compact objects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Caio F. B. Macedo, Lu\\'is C. B. Crispino, Sam Dolan, Tom Stratton","submitted_at":"2018-07-12T18:00:07Z","abstract_excerpt":"We study the absorption of scalar fields by extreme/exotic compact objects (ECOs) -- horizonless alternatives to black holes -- via a simple model in which dissipative mechanisms are encapsulated in a single parameter. Trapped modes, localized between the ECO core and the potential barrier at the photosphere, generate Breit-Wigner-type spectral lines in the absorption cross section. Absorption is enhanced whenever the wave frequency resonates with a trapped mode, leading to a spectral profile which differs qualitatively from that of a black hole. We introduce a model based on Nariai spacetime,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.04762","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":""},"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":"2026-05-17T23:59:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mEnx33LYNLqlDd1qKRGqGfKe7RZzdU7lpy23j9HV/ARy/tJVxnt4rIKTOKkLrO1qCqpbzN4Hij9w5kqOGSUZDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T07:05:15.865442Z"},"content_sha256":"a6adc234739230824e3a2d5d29bd1be04b63f3fab6f53cf2c4f5248a1a0bcef7","schema_version":"1.0","event_id":"sha256:a6adc234739230824e3a2d5d29bd1be04b63f3fab6f53cf2c4f5248a1a0bcef7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/62WA6OSNOKPSBL5QDX2TJFOAHJ/bundle.json","state_url":"https://pith.science/pith/62WA6OSNOKPSBL5QDX2TJFOAHJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/62WA6OSNOKPSBL5QDX2TJFOAHJ/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":"2026-05-26T07:05:15Z","links":{"resolver":"https://pith.science/pith/62WA6OSNOKPSBL5QDX2TJFOAHJ","bundle":"https://pith.science/pith/62WA6OSNOKPSBL5QDX2TJFOAHJ/bundle.json","state":"https://pith.science/pith/62WA6OSNOKPSBL5QDX2TJFOAHJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/62WA6OSNOKPSBL5QDX2TJFOAHJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:62WA6OSNOKPSBL5QDX2TJFOAHJ","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":"d95ed723352537b6b851a477cfbd101d641d4683322572ddbaf456051b1b1fcb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-07-12T18:00:07Z","title_canon_sha256":"f1ffa220c0d0567cec4c242aec2976bcf6502af07d9cf59c8a0bbf24921af061"},"schema_version":"1.0","source":{"id":"1807.04762","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.04762","created_at":"2026-05-17T23:59:52Z"},{"alias_kind":"arxiv_version","alias_value":"1807.04762v2","created_at":"2026-05-17T23:59:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.04762","created_at":"2026-05-17T23:59:52Z"},{"alias_kind":"pith_short_12","alias_value":"62WA6OSNOKPS","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"62WA6OSNOKPSBL5Q","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"62WA6OSN","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:a6adc234739230824e3a2d5d29bd1be04b63f3fab6f53cf2c4f5248a1a0bcef7","target":"graph","created_at":"2026-05-17T23:59:52Z","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":"We study the absorption of scalar fields by extreme/exotic compact objects (ECOs) -- horizonless alternatives to black holes -- via a simple model in which dissipative mechanisms are encapsulated in a single parameter. Trapped modes, localized between the ECO core and the potential barrier at the photosphere, generate Breit-Wigner-type spectral lines in the absorption cross section. Absorption is enhanced whenever the wave frequency resonates with a trapped mode, leading to a spectral profile which differs qualitatively from that of a black hole. We introduce a model based on Nariai spacetime,","authors_text":"Caio F. B. Macedo, Lu\\'is C. B. Crispino, Sam Dolan, Tom Stratton","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-07-12T18:00:07Z","title":"Spectral lines of extreme compact objects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.04762","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:d960c2c15758fb34fbbac0024674d494326be8652120068042528ba8479b25b3","target":"record","created_at":"2026-05-17T23:59:52Z","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":"d95ed723352537b6b851a477cfbd101d641d4683322572ddbaf456051b1b1fcb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-07-12T18:00:07Z","title_canon_sha256":"f1ffa220c0d0567cec4c242aec2976bcf6502af07d9cf59c8a0bbf24921af061"},"schema_version":"1.0","source":{"id":"1807.04762","kind":"arxiv","version":2}},"canonical_sha256":"f6ac0f3a4d729f20afb01df53495c03a68b639c2bd4140773711b2fb8afed5b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6ac0f3a4d729f20afb01df53495c03a68b639c2bd4140773711b2fb8afed5b5","first_computed_at":"2026-05-17T23:59:52.267168Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:52.267168Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ycs82ecQINVFiR4H3d57WuzUV6h3YkxhxNT3ZNMLn/AEo08ov/ifUEqrR3QI7ztHLp4+NjpfHYSCEDGPJBpmBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:52.267716Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.04762","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d960c2c15758fb34fbbac0024674d494326be8652120068042528ba8479b25b3","sha256:a6adc234739230824e3a2d5d29bd1be04b63f3fab6f53cf2c4f5248a1a0bcef7"],"state_sha256":"2ff5b15a1ad4b78943a5a20d069c8f20cb890eea08870c6939a8a151da0e2533"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gU24CTF3Edib8XdDF3gZEJ2cCCjk/YH2CeT+kRUGRHD2PuLZLJ5Xwwzy5mufiZXf0pTsMNeCxuY5DKx+lo+VAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T07:05:15.868615Z","bundle_sha256":"a6e4a2dcc3843e61dd4e2357fbd5db2e71346eaa5709d01b2765c3eb451b2a34"}}