{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:SRM5DRRFVLRDZEWUYCAKN3HOWV","short_pith_number":"pith:SRM5DRRF","canonical_record":{"source":{"id":"astro-ph/9907125","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-09T17:31:25Z","cross_cats_sorted":[],"title_canon_sha256":"f660badd11b0d560b1a7e8b7cc2c858cd2548e9b5f3b981855e6179963b3f4a5","abstract_canon_sha256":"d18086d98c1664cf7ca3d1aa7167dcd56964f1598d0169b60acdc83eba19e570"},"schema_version":"1.0"},"canonical_sha256":"9459d1c625aae23c92d4c080a6eceeb563f1f15e27d392f6859882582152f220","source":{"kind":"arxiv","id":"astro-ph/9907125","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9907125","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9907125v2","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9907125","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"pith_short_12","alias_value":"SRM5DRRFVLRD","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"pith_short_16","alias_value":"SRM5DRRFVLRDZEWU","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"pith_short_8","alias_value":"SRM5DRRF","created_at":"2026-07-04T14:16:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:SRM5DRRFVLRDZEWUYCAKN3HOWV","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9907125","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-09T17:31:25Z","cross_cats_sorted":[],"title_canon_sha256":"f660badd11b0d560b1a7e8b7cc2c858cd2548e9b5f3b981855e6179963b3f4a5","abstract_canon_sha256":"d18086d98c1664cf7ca3d1aa7167dcd56964f1598d0169b60acdc83eba19e570"},"schema_version":"1.0"},"canonical_sha256":"9459d1c625aae23c92d4c080a6eceeb563f1f15e27d392f6859882582152f220","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:16:58.708507Z","signature_b64":"vLTXztM6FrHlcK96ZJtCqI5W0UsZTh+jNKgYtwM6tFzr1CDj2twgc18FFQK/WvdCdVGYwlHJ3NhdKLb25PE8BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9459d1c625aae23c92d4c080a6eceeb563f1f15e27d392f6859882582152f220","last_reissued_at":"2026-07-04T14:16:58.708049Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:16:58.708049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9907125","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":"2026-07-04T14:16:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZYpjnoij9vNxSQud7jhratPu3/9hWodaW2uJ2is0ZDfGBtpfduu8KeTEEsJdOScHqdArFjGHouWtoJVKKv7wBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T07:50:35.080324Z"},"content_sha256":"118ef84a773dc5b7048f451f85389d462e29e32e6f0c3f5835b4b5f4059743a2","schema_version":"1.0","event_id":"sha256:118ef84a773dc5b7048f451f85389d462e29e32e6f0c3f5835b4b5f4059743a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:SRM5DRRFVLRDZEWUYCAKN3HOWV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Particle reacceleration in the Coma cluster and the radio, EUV and hard X-ray emissions","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"G. Brunetti, G. Giovannini, G. Setti, L. Feretti","submitted_at":"1999-07-09T17:31:25Z","abstract_excerpt":"The radio spectral index map of the Coma halo shows a progressive steepening of the spectral index with increasing radius. Such a steepening cannot be simply justified by models involving continuous injection of fresh particles in the Coma halo or by models involving diffusion of fresh electrons from the central regions. We propose a scenario in which the relativistic particles injected in the Coma cluster by some processes (merger, accretion shocks, turbulence) are systematically reaccelerated for a relatively long time ($\\sim$ 1Gyr). We show that such a scenario can account for the synchrotr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9907125","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9907125/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":"2026-07-04T14:16:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bpwpqYHVD0Q2i++Jft5pF9DJJRdXpuvxbP3AgYtoa//0j74KXHcu6UndUNK0f/rTRNcwWFM1eQzRQIo0RDqlDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T07:50:35.080835Z"},"content_sha256":"bdf043eee400c7a158060ee7c8e84d227f67ac0542d5639e09ca66ee580d350b","schema_version":"1.0","event_id":"sha256:bdf043eee400c7a158060ee7c8e84d227f67ac0542d5639e09ca66ee580d350b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SRM5DRRFVLRDZEWUYCAKN3HOWV/bundle.json","state_url":"https://pith.science/pith/SRM5DRRFVLRDZEWUYCAKN3HOWV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SRM5DRRFVLRDZEWUYCAKN3HOWV/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":"2026-08-06T07:50:35Z","links":{"resolver":"https://pith.science/pith/SRM5DRRFVLRDZEWUYCAKN3HOWV","bundle":"https://pith.science/pith/SRM5DRRFVLRDZEWUYCAKN3HOWV/bundle.json","state":"https://pith.science/pith/SRM5DRRFVLRDZEWUYCAKN3HOWV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SRM5DRRFVLRDZEWUYCAKN3HOWV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:SRM5DRRFVLRDZEWUYCAKN3HOWV","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":"d18086d98c1664cf7ca3d1aa7167dcd56964f1598d0169b60acdc83eba19e570","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-09T17:31:25Z","title_canon_sha256":"f660badd11b0d560b1a7e8b7cc2c858cd2548e9b5f3b981855e6179963b3f4a5"},"schema_version":"1.0","source":{"id":"astro-ph/9907125","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9907125","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9907125v2","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9907125","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"pith_short_12","alias_value":"SRM5DRRFVLRD","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"pith_short_16","alias_value":"SRM5DRRFVLRDZEWU","created_at":"2026-07-04T14:16:58Z"},{"alias_kind":"pith_short_8","alias_value":"SRM5DRRF","created_at":"2026-07-04T14:16:58Z"}],"graph_snapshots":[{"event_id":"sha256:bdf043eee400c7a158060ee7c8e84d227f67ac0542d5639e09ca66ee580d350b","target":"graph","created_at":"2026-07-04T14:16:58Z","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/astro-ph/9907125/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The radio spectral index map of the Coma halo shows a progressive steepening of the spectral index with increasing radius. Such a steepening cannot be simply justified by models involving continuous injection of fresh particles in the Coma halo or by models involving diffusion of fresh electrons from the central regions. We propose a scenario in which the relativistic particles injected in the Coma cluster by some processes (merger, accretion shocks, turbulence) are systematically reaccelerated for a relatively long time ($\\sim$ 1Gyr). We show that such a scenario can account for the synchrotr","authors_text":"G. Brunetti, G. Giovannini, G. Setti, L. Feretti","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-07-09T17:31:25Z","title":"Particle reacceleration in the Coma cluster and the radio, EUV and hard X-ray emissions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9907125","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":"sha256:118ef84a773dc5b7048f451f85389d462e29e32e6f0c3f5835b4b5f4059743a2","target":"record","created_at":"2026-07-04T14:16:58Z","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":"d18086d98c1664cf7ca3d1aa7167dcd56964f1598d0169b60acdc83eba19e570","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-09T17:31:25Z","title_canon_sha256":"f660badd11b0d560b1a7e8b7cc2c858cd2548e9b5f3b981855e6179963b3f4a5"},"schema_version":"1.0","source":{"id":"astro-ph/9907125","kind":"arxiv","version":2}},"canonical_sha256":"9459d1c625aae23c92d4c080a6eceeb563f1f15e27d392f6859882582152f220","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9459d1c625aae23c92d4c080a6eceeb563f1f15e27d392f6859882582152f220","first_computed_at":"2026-07-04T14:16:58.708049Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:16:58.708049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vLTXztM6FrHlcK96ZJtCqI5W0UsZTh+jNKgYtwM6tFzr1CDj2twgc18FFQK/WvdCdVGYwlHJ3NhdKLb25PE8BA==","signature_status":"signed_v1","signed_at":"2026-07-04T14:16:58.708507Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9907125","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:118ef84a773dc5b7048f451f85389d462e29e32e6f0c3f5835b4b5f4059743a2","sha256:bdf043eee400c7a158060ee7c8e84d227f67ac0542d5639e09ca66ee580d350b"],"state_sha256":"dc8b591b0ca65edee1dc6abb85296f159009e8f2ea7622a8f6b899b4b0ae3256"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cFKxg+cxTZiQC8sRcEgvV50ZaFf/UZ1VkAuaDaXNCja4Rc+0xU5Xgm3MfOj3QiQ7OBIz1fTBqHhcM4rSoOjZCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T07:50:35.086371Z","bundle_sha256":"817c58828647ec8cd5754c2b4f5523667013f60f122a7a161b2159ec6744789d"}}