{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:5TGG4JDBFKE5E7YL22ZIBC3CIE","short_pith_number":"pith:5TGG4JDB","canonical_record":{"source":{"id":"0810.4288","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-23T14:27:35Z","cross_cats_sorted":[],"title_canon_sha256":"f304242e2fe49ddc6a0648c9533e34cd208b9c2d626ce03a8aa624a45935c84f","abstract_canon_sha256":"e0a8cf6b308436318020c3e5d7e0cc4e71ba8ab13eb83e007c590be3a26f7367"},"schema_version":"1.0"},"canonical_sha256":"eccc6e24612a89d27f0bd6b2808b62412d490059b9185e193a572989a1058002","source":{"kind":"arxiv","id":"0810.4288","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.4288","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"arxiv_version","alias_value":"0810.4288v1","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.4288","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"pith_short_12","alias_value":"5TGG4JDBFKE5","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"pith_short_16","alias_value":"5TGG4JDBFKE5E7YL","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"pith_short_8","alias_value":"5TGG4JDB","created_at":"2026-07-04T17:13:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:5TGG4JDBFKE5E7YL22ZIBC3CIE","target":"record","payload":{"canonical_record":{"source":{"id":"0810.4288","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-23T14:27:35Z","cross_cats_sorted":[],"title_canon_sha256":"f304242e2fe49ddc6a0648c9533e34cd208b9c2d626ce03a8aa624a45935c84f","abstract_canon_sha256":"e0a8cf6b308436318020c3e5d7e0cc4e71ba8ab13eb83e007c590be3a26f7367"},"schema_version":"1.0"},"canonical_sha256":"eccc6e24612a89d27f0bd6b2808b62412d490059b9185e193a572989a1058002","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:13:19.185173Z","signature_b64":"99Bm94tzuFxtAEZhm19C74LlBS2tsCldeNTkCXXvo5xhBHKfJ4BLdk9BmMtM1pc5j8Zb3aQorOWSVSrnIVL9DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eccc6e24612a89d27f0bd6b2808b62412d490059b9185e193a572989a1058002","last_reissued_at":"2026-07-04T17:13:19.184804Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:13:19.184804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.4288","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":"2026-07-04T17:13:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hg7NV7LunhS7KwFRk+4wS/LgA5otMXtEKS3dgWGe5MFW1xp3mVP3KTl/teCSPdm9oAJxywskQ6bsEcT6A6hDDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T13:24:57.708263Z"},"content_sha256":"0c8e5eb04a5210edfa29ce03d98ebb09d7b75654c4a01f5d7fce41695d8a4dd8","schema_version":"1.0","event_id":"sha256:0c8e5eb04a5210edfa29ce03d98ebb09d7b75654c4a01f5d7fce41695d8a4dd8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:5TGG4JDBFKE5E7YL22ZIBC3CIE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A low-frequency radio halo associated with a cluster of galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Dallacasa, G. Brunetti, G. Setti, M. Markevitch, N. Kassim, R. Cassano, S. Giacintucci, T. Venturi, W.D. Cotton, W. Lane","submitted_at":"2008-10-23T14:27:35Z","abstract_excerpt":"Clusters of galaxies are the largest gravitationally bound objects in the Universe, containing about 10^15 solar masses of hot (10^8 K) gas, galaxies and dark matter in a typical volume of about 10 Mpc^3. Magnetic fields and relativistic particles are mixed with the gas as revealed by giant radio haloes, which arise from diffuse, megaparsec-scale synchrotron radiation at cluster center. Radio haloes require that the emitting electrons are accelerated in situ (by turbulence), or are injected (as secondary particles) by proton collisions into the intergalactic medium. They are found only in a fr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.4288","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/0810.4288/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":"2026-07-04T17:13:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GkuGPeaiROGzdz+yeO245ml6dVaLa8MNJIi+xmlNLzeFYn3qxL9MkWUsQvorR4wS5UZWHDosJZFRc/iR6TkJDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T13:24:57.708597Z"},"content_sha256":"c94c2bebf34dbb1fa1ea953228a2289401401e32fa4b3daa1811134406fc0181","schema_version":"1.0","event_id":"sha256:c94c2bebf34dbb1fa1ea953228a2289401401e32fa4b3daa1811134406fc0181"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5TGG4JDBFKE5E7YL22ZIBC3CIE/bundle.json","state_url":"https://pith.science/pith/5TGG4JDBFKE5E7YL22ZIBC3CIE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5TGG4JDBFKE5E7YL22ZIBC3CIE/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":"2026-07-31T13:24:57Z","links":{"resolver":"https://pith.science/pith/5TGG4JDBFKE5E7YL22ZIBC3CIE","bundle":"https://pith.science/pith/5TGG4JDBFKE5E7YL22ZIBC3CIE/bundle.json","state":"https://pith.science/pith/5TGG4JDBFKE5E7YL22ZIBC3CIE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5TGG4JDBFKE5E7YL22ZIBC3CIE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:5TGG4JDBFKE5E7YL22ZIBC3CIE","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":"e0a8cf6b308436318020c3e5d7e0cc4e71ba8ab13eb83e007c590be3a26f7367","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-23T14:27:35Z","title_canon_sha256":"f304242e2fe49ddc6a0648c9533e34cd208b9c2d626ce03a8aa624a45935c84f"},"schema_version":"1.0","source":{"id":"0810.4288","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.4288","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"arxiv_version","alias_value":"0810.4288v1","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.4288","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"pith_short_12","alias_value":"5TGG4JDBFKE5","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"pith_short_16","alias_value":"5TGG4JDBFKE5E7YL","created_at":"2026-07-04T17:13:19Z"},{"alias_kind":"pith_short_8","alias_value":"5TGG4JDB","created_at":"2026-07-04T17:13:19Z"}],"graph_snapshots":[{"event_id":"sha256:c94c2bebf34dbb1fa1ea953228a2289401401e32fa4b3daa1811134406fc0181","target":"graph","created_at":"2026-07-04T17:13:19Z","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/0810.4288/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Clusters of galaxies are the largest gravitationally bound objects in the Universe, containing about 10^15 solar masses of hot (10^8 K) gas, galaxies and dark matter in a typical volume of about 10 Mpc^3. Magnetic fields and relativistic particles are mixed with the gas as revealed by giant radio haloes, which arise from diffuse, megaparsec-scale synchrotron radiation at cluster center. Radio haloes require that the emitting electrons are accelerated in situ (by turbulence), or are injected (as secondary particles) by proton collisions into the intergalactic medium. They are found only in a fr","authors_text":"D. Dallacasa, G. Brunetti, G. Setti, M. Markevitch, N. Kassim, R. Cassano, S. Giacintucci, T. Venturi, W.D. Cotton, W. Lane","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-23T14:27:35Z","title":"A low-frequency radio halo associated with a cluster of galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.4288","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":"sha256:0c8e5eb04a5210edfa29ce03d98ebb09d7b75654c4a01f5d7fce41695d8a4dd8","target":"record","created_at":"2026-07-04T17:13:19Z","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":"e0a8cf6b308436318020c3e5d7e0cc4e71ba8ab13eb83e007c590be3a26f7367","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-23T14:27:35Z","title_canon_sha256":"f304242e2fe49ddc6a0648c9533e34cd208b9c2d626ce03a8aa624a45935c84f"},"schema_version":"1.0","source":{"id":"0810.4288","kind":"arxiv","version":1}},"canonical_sha256":"eccc6e24612a89d27f0bd6b2808b62412d490059b9185e193a572989a1058002","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eccc6e24612a89d27f0bd6b2808b62412d490059b9185e193a572989a1058002","first_computed_at":"2026-07-04T17:13:19.184804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:13:19.184804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"99Bm94tzuFxtAEZhm19C74LlBS2tsCldeNTkCXXvo5xhBHKfJ4BLdk9BmMtM1pc5j8Zb3aQorOWSVSrnIVL9DQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:13:19.185173Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.4288","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c8e5eb04a5210edfa29ce03d98ebb09d7b75654c4a01f5d7fce41695d8a4dd8","sha256:c94c2bebf34dbb1fa1ea953228a2289401401e32fa4b3daa1811134406fc0181"],"state_sha256":"8a29c47905fb3383e894b3fcea6d0ac29073562edf870859235921a9f6df1531"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uQxDvz8n7oFXgDloNJMdi/obLYMXOe3mg/wpjY7lD++Ns/sNuiHPmzC+yMcTm9XIpinpAb/dimEjOkVJK7CgBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T13:24:57.710831Z","bundle_sha256":"b755caa2a03bef5346975501cc24924f19702bf754045931c290635a7419d32b"}}