{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:WWWRCZ57DJRYU4RFM73EXSVQCJ","short_pith_number":"pith:WWWRCZ57","canonical_record":{"source":{"id":"1204.4500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-19T23:41:11Z","cross_cats_sorted":[],"title_canon_sha256":"c08a33fe9df7c517499be6c18886ee8384044ac52abcebe42781cfb5a6298a48","abstract_canon_sha256":"1836ea68075023dd5a61c5f5487922d9c4254ac3cb94e28d78f29a5eb7d52dd1"},"schema_version":"1.0"},"canonical_sha256":"b5ad1167bf1a638a722567f64bcab01272d73df2247594fa002ae078f7faa47a","source":{"kind":"arxiv","id":"1204.4500","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.4500","created_at":"2026-05-18T01:57:48Z"},{"alias_kind":"arxiv_version","alias_value":"1204.4500v1","created_at":"2026-05-18T01:57:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.4500","created_at":"2026-05-18T01:57:48Z"},{"alias_kind":"pith_short_12","alias_value":"WWWRCZ57DJRY","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"WWWRCZ57DJRYU4RF","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"WWWRCZ57","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:WWWRCZ57DJRYU4RFM73EXSVQCJ","target":"record","payload":{"canonical_record":{"source":{"id":"1204.4500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-19T23:41:11Z","cross_cats_sorted":[],"title_canon_sha256":"c08a33fe9df7c517499be6c18886ee8384044ac52abcebe42781cfb5a6298a48","abstract_canon_sha256":"1836ea68075023dd5a61c5f5487922d9c4254ac3cb94e28d78f29a5eb7d52dd1"},"schema_version":"1.0"},"canonical_sha256":"b5ad1167bf1a638a722567f64bcab01272d73df2247594fa002ae078f7faa47a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:48.382651Z","signature_b64":"ECfjAg6907wvVonC9zOLwy3rJBkN3e3wNZkW5FP1KolCJHFPOVA7ii7YB20WgqFpxZILlWFzNZ/ESPGDNe4ECw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b5ad1167bf1a638a722567f64bcab01272d73df2247594fa002ae078f7faa47a","last_reissued_at":"2026-05-18T01:57:48.381999Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:48.381999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.4500","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:57:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PanQCOyom/BMYhmjlwngKUTp6oi92yir6YM84LDiHGBQjxjE8B/wdDyi7JLKBWMuqphKPD4YahR6GIIJBcjXAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T21:02:00.836437Z"},"content_sha256":"181557a627294e5d8f1ad388802452d72c3dd325c8d62b6828c2cd3b7890a0d1","schema_version":"1.0","event_id":"sha256:181557a627294e5d8f1ad388802452d72c3dd325c8d62b6828c2cd3b7890a0d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:WWWRCZ57DJRYU4RFM73EXSVQCJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How many Ultra High Energy Cosmic Rays could we expect from Centaurus A?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Marinelli, M. M. Gonzalez, M. Perez, Nissim Fraija","submitted_at":"2012-04-19T23:41:11Z","abstract_excerpt":"The Pierre Auger Observatory has associated a few ultra high energy cosmic rays with the direction of Centaurus A. This source has been deeply studied in radio, infrared, X-ray and $\\gamma$-rays (MeV-TeV) because it is the nearest radio-loud active galactic nuclei.\n  Its spectral energy distribution or spectrum shows two main peaks, the low energy peak, at an energy of $10^{-2}$ eV, and the high energy peak, at about 150 keV.\n  There is also a faint very high energy (E $\\geq$ 100 GeV) $\\gamma$-ray emission fully detected by the High Energy Stereoscopic System experiment. In this work we descri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.4500","kind":"arxiv","version":1},"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":"2026-05-18T01:57:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2f5WK6dc7MDxfRlNMRNpkdI2Zz3LM8MpyYTsryNXWRZqq4Kcwc4AX6o4bfzF3vUIENhnnfLgdrzvMat77iGABQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T21:02:00.836789Z"},"content_sha256":"1292de3177d91d037feec77541d1c2e3ecbc7cf838e7275a2b3bd7004c74bbd7","schema_version":"1.0","event_id":"sha256:1292de3177d91d037feec77541d1c2e3ecbc7cf838e7275a2b3bd7004c74bbd7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WWWRCZ57DJRYU4RFM73EXSVQCJ/bundle.json","state_url":"https://pith.science/pith/WWWRCZ57DJRYU4RFM73EXSVQCJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WWWRCZ57DJRYU4RFM73EXSVQCJ/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":"2026-06-24T21:02:00Z","links":{"resolver":"https://pith.science/pith/WWWRCZ57DJRYU4RFM73EXSVQCJ","bundle":"https://pith.science/pith/WWWRCZ57DJRYU4RFM73EXSVQCJ/bundle.json","state":"https://pith.science/pith/WWWRCZ57DJRYU4RFM73EXSVQCJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WWWRCZ57DJRYU4RFM73EXSVQCJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:WWWRCZ57DJRYU4RFM73EXSVQCJ","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":"1836ea68075023dd5a61c5f5487922d9c4254ac3cb94e28d78f29a5eb7d52dd1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-19T23:41:11Z","title_canon_sha256":"c08a33fe9df7c517499be6c18886ee8384044ac52abcebe42781cfb5a6298a48"},"schema_version":"1.0","source":{"id":"1204.4500","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.4500","created_at":"2026-05-18T01:57:48Z"},{"alias_kind":"arxiv_version","alias_value":"1204.4500v1","created_at":"2026-05-18T01:57:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.4500","created_at":"2026-05-18T01:57:48Z"},{"alias_kind":"pith_short_12","alias_value":"WWWRCZ57DJRY","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"WWWRCZ57DJRYU4RF","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"WWWRCZ57","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:1292de3177d91d037feec77541d1c2e3ecbc7cf838e7275a2b3bd7004c74bbd7","target":"graph","created_at":"2026-05-18T01:57:48Z","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 Pierre Auger Observatory has associated a few ultra high energy cosmic rays with the direction of Centaurus A. This source has been deeply studied in radio, infrared, X-ray and $\\gamma$-rays (MeV-TeV) because it is the nearest radio-loud active galactic nuclei.\n  Its spectral energy distribution or spectrum shows two main peaks, the low energy peak, at an energy of $10^{-2}$ eV, and the high energy peak, at about 150 keV.\n  There is also a faint very high energy (E $\\geq$ 100 GeV) $\\gamma$-ray emission fully detected by the High Energy Stereoscopic System experiment. In this work we descri","authors_text":"A. Marinelli, M. M. Gonzalez, M. Perez, Nissim Fraija","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-19T23:41:11Z","title":"How many Ultra High Energy Cosmic Rays could we expect from Centaurus A?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.4500","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":"sha256:181557a627294e5d8f1ad388802452d72c3dd325c8d62b6828c2cd3b7890a0d1","target":"record","created_at":"2026-05-18T01:57:48Z","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":"1836ea68075023dd5a61c5f5487922d9c4254ac3cb94e28d78f29a5eb7d52dd1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-19T23:41:11Z","title_canon_sha256":"c08a33fe9df7c517499be6c18886ee8384044ac52abcebe42781cfb5a6298a48"},"schema_version":"1.0","source":{"id":"1204.4500","kind":"arxiv","version":1}},"canonical_sha256":"b5ad1167bf1a638a722567f64bcab01272d73df2247594fa002ae078f7faa47a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b5ad1167bf1a638a722567f64bcab01272d73df2247594fa002ae078f7faa47a","first_computed_at":"2026-05-18T01:57:48.381999Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:48.381999Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ECfjAg6907wvVonC9zOLwy3rJBkN3e3wNZkW5FP1KolCJHFPOVA7ii7YB20WgqFpxZILlWFzNZ/ESPGDNe4ECw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:48.382651Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.4500","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:181557a627294e5d8f1ad388802452d72c3dd325c8d62b6828c2cd3b7890a0d1","sha256:1292de3177d91d037feec77541d1c2e3ecbc7cf838e7275a2b3bd7004c74bbd7"],"state_sha256":"e18560fa9d039ee3bfb0d99dd02e1b80d7dcb65e7f950491fd7c2de8266c1e98"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2a7uWP294EJBTHtbNPWXIk5S+6bV5BUwqUu/lgbKCyU44RaG3NhYaEZ9yEGSCzg8USEWT9qwBa36EVuNX4SDDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T21:02:00.838821Z","bundle_sha256":"9fd7b13d09ef49923a2356e6cfad15de4eb1e318258588be597d591b19932c2e"}}