{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:5U3SBSQVELYWFFVTV5YSMEM6EN","short_pith_number":"pith:5U3SBSQV","canonical_record":{"source":{"id":"2107.13278","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-07-28T11:20:26Z","cross_cats_sorted":[],"title_canon_sha256":"5add7e5a28d24a68d458d5239c01f13a3b4a1fb73721a4d0b7911af1dcde0228","abstract_canon_sha256":"661f83cf9ba73bec823a5bed6a943edede346ffb3b2003c4ecfd459ae5164198"},"schema_version":"1.0"},"canonical_sha256":"ed3720ca1522f16296b3af7126119e234d6c575699647a88ad45dc98654cc92d","source":{"kind":"arxiv","id":"2107.13278","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.13278","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"arxiv_version","alias_value":"2107.13278v1","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.13278","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"pith_short_12","alias_value":"5U3SBSQVELYW","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"pith_short_16","alias_value":"5U3SBSQVELYWFFVT","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"pith_short_8","alias_value":"5U3SBSQV","created_at":"2026-07-05T03:01:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:5U3SBSQVELYWFFVTV5YSMEM6EN","target":"record","payload":{"canonical_record":{"source":{"id":"2107.13278","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-07-28T11:20:26Z","cross_cats_sorted":[],"title_canon_sha256":"5add7e5a28d24a68d458d5239c01f13a3b4a1fb73721a4d0b7911af1dcde0228","abstract_canon_sha256":"661f83cf9ba73bec823a5bed6a943edede346ffb3b2003c4ecfd459ae5164198"},"schema_version":"1.0"},"canonical_sha256":"ed3720ca1522f16296b3af7126119e234d6c575699647a88ad45dc98654cc92d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:01:28.590237Z","signature_b64":"NuRJ/HHjZ9JbutS3piKdlrz/mNODPvkg8vDBRd1tJYTnYnacubNN184ci4KuiGQUh4cttv+8TCzaWHWrSO84BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed3720ca1522f16296b3af7126119e234d6c575699647a88ad45dc98654cc92d","last_reissued_at":"2026-07-05T03:01:28.589840Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:01:28.589840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.13278","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":"2026-07-05T03:01:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9yQAqxCrDBwd1W2xYgMOb4f5RTfLhO6NHWeOvImdwbVTPkDVcU2EJWSqkHiNr8UIrOh+IvUx4DikMHiihBCWDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:37:57.730787Z"},"content_sha256":"5bc214405712eeea5d752eb91aa36f02076aa8c2f42fc194cf59f706da47d16c","schema_version":"1.0","event_id":"sha256:5bc214405712eeea5d752eb91aa36f02076aa8c2f42fc194cf59f706da47d16c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:5U3SBSQVELYWFFVTV5YSMEM6EN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FR-0 jetted active galaxies: extending the zoo of candidate sites for UHECR acceleration","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Anita Reimer, Chiara Righi, Fabrizio Tavecchio, Giacomo Bonnoli, Jon Paul Lundquist, Lukas Merten, Margot Boughelilba, Paolo Da Vela, Serguei Vorobiov","submitted_at":"2021-07-28T11:20:26Z","abstract_excerpt":"Fanaroff-Riley (FR) 0 radio galaxies form a low-luminosity extension to the well-established ultra-high-energy cosmic-ray (UHECR) candidate accelerators FR-1 and FR-2 galaxies. Their much higher number density -- up to a factor five times more numerous than FR-1 with $z\\leq 0.05$ -- makes them good candidate sources for an isotropic contribution to the observed UHECR flux. Here, the acceleration and survival of UHECR in prevailing conditions of the FR-0 environment are discussed.\n  First, an average spectral energy distribution (SED) is compiled based on the \\textit{FR0CAT}. These photon field"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.13278","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.13278/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":"2026-07-05T03:01:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B4MdRK+Nnvh2ZqauxU4wPnHmGc6xaAaNto58T+fNzHAlf00zhqWYaXrxOGLzYupCZojhF/e/804tZ0LguqoNAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:37:57.731616Z"},"content_sha256":"543b4ea0b02b26f81e5f6fdf768cb8c349d7df135fcb803851409ef05b9c3a2b","schema_version":"1.0","event_id":"sha256:543b4ea0b02b26f81e5f6fdf768cb8c349d7df135fcb803851409ef05b9c3a2b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5U3SBSQVELYWFFVTV5YSMEM6EN/bundle.json","state_url":"https://pith.science/pith/5U3SBSQVELYWFFVTV5YSMEM6EN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5U3SBSQVELYWFFVTV5YSMEM6EN/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":"2026-07-05T14:37:57Z","links":{"resolver":"https://pith.science/pith/5U3SBSQVELYWFFVTV5YSMEM6EN","bundle":"https://pith.science/pith/5U3SBSQVELYWFFVTV5YSMEM6EN/bundle.json","state":"https://pith.science/pith/5U3SBSQVELYWFFVTV5YSMEM6EN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5U3SBSQVELYWFFVTV5YSMEM6EN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:5U3SBSQVELYWFFVTV5YSMEM6EN","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":"661f83cf9ba73bec823a5bed6a943edede346ffb3b2003c4ecfd459ae5164198","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-07-28T11:20:26Z","title_canon_sha256":"5add7e5a28d24a68d458d5239c01f13a3b4a1fb73721a4d0b7911af1dcde0228"},"schema_version":"1.0","source":{"id":"2107.13278","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.13278","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"arxiv_version","alias_value":"2107.13278v1","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.13278","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"pith_short_12","alias_value":"5U3SBSQVELYW","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"pith_short_16","alias_value":"5U3SBSQVELYWFFVT","created_at":"2026-07-05T03:01:28Z"},{"alias_kind":"pith_short_8","alias_value":"5U3SBSQV","created_at":"2026-07-05T03:01:28Z"}],"graph_snapshots":[{"event_id":"sha256:543b4ea0b02b26f81e5f6fdf768cb8c349d7df135fcb803851409ef05b9c3a2b","target":"graph","created_at":"2026-07-05T03:01:28Z","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/2107.13278/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Fanaroff-Riley (FR) 0 radio galaxies form a low-luminosity extension to the well-established ultra-high-energy cosmic-ray (UHECR) candidate accelerators FR-1 and FR-2 galaxies. Their much higher number density -- up to a factor five times more numerous than FR-1 with $z\\leq 0.05$ -- makes them good candidate sources for an isotropic contribution to the observed UHECR flux. Here, the acceleration and survival of UHECR in prevailing conditions of the FR-0 environment are discussed.\n  First, an average spectral energy distribution (SED) is compiled based on the \\textit{FR0CAT}. These photon field","authors_text":"Anita Reimer, Chiara Righi, Fabrizio Tavecchio, Giacomo Bonnoli, Jon Paul Lundquist, Lukas Merten, Margot Boughelilba, Paolo Da Vela, Serguei Vorobiov","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-07-28T11:20:26Z","title":"FR-0 jetted active galaxies: extending the zoo of candidate sites for UHECR acceleration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.13278","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":"sha256:5bc214405712eeea5d752eb91aa36f02076aa8c2f42fc194cf59f706da47d16c","target":"record","created_at":"2026-07-05T03:01:28Z","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":"661f83cf9ba73bec823a5bed6a943edede346ffb3b2003c4ecfd459ae5164198","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-07-28T11:20:26Z","title_canon_sha256":"5add7e5a28d24a68d458d5239c01f13a3b4a1fb73721a4d0b7911af1dcde0228"},"schema_version":"1.0","source":{"id":"2107.13278","kind":"arxiv","version":1}},"canonical_sha256":"ed3720ca1522f16296b3af7126119e234d6c575699647a88ad45dc98654cc92d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed3720ca1522f16296b3af7126119e234d6c575699647a88ad45dc98654cc92d","first_computed_at":"2026-07-05T03:01:28.589840Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:01:28.589840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NuRJ/HHjZ9JbutS3piKdlrz/mNODPvkg8vDBRd1tJYTnYnacubNN184ci4KuiGQUh4cttv+8TCzaWHWrSO84BA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:01:28.590237Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.13278","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bc214405712eeea5d752eb91aa36f02076aa8c2f42fc194cf59f706da47d16c","sha256:543b4ea0b02b26f81e5f6fdf768cb8c349d7df135fcb803851409ef05b9c3a2b"],"state_sha256":"ee965b86389dcb4fcc99743f960469583e369969f6c19527802f9a24f6fc654c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+JdqQzp8Ef/XOUtmx7roWOx4rZB9wcDHtgp8foh7+020VCy63vvFLZPgxB+DfW5zXZksUm78O/o3kviYb+m5CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T14:37:57.735161Z","bundle_sha256":"eb24319e48ec5c4b787c98703df166d43165392a583441a34c98dfff9cb673fa"}}