{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:E3FM2J6H77DN4FH6CCIT42UYIU","short_pith_number":"pith:E3FM2J6H","canonical_record":{"source":{"id":"2509.02645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-09-02T10:53:14Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"607eff128d48c388083886ee820b9bc6e2f6ea2ae8d936d2721d405a0a74f5d5","abstract_canon_sha256":"2d708b8b6b9ef6a7413e78ca5ff917bcfaa8ab15126abcbcab609289ff5937ff"},"schema_version":"1.0"},"canonical_sha256":"26cacd27c7ffc6de14fe10913e6a9845358f76614574ab6aa9e28defdca17480","source":{"kind":"arxiv","id":"2509.02645","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.02645","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"arxiv_version","alias_value":"2509.02645v1","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.02645","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"pith_short_12","alias_value":"E3FM2J6H77DN","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"pith_short_16","alias_value":"E3FM2J6H77DN4FH6","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"pith_short_8","alias_value":"E3FM2J6H","created_at":"2026-07-05T12:03:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:E3FM2J6H77DN4FH6CCIT42UYIU","target":"record","payload":{"canonical_record":{"source":{"id":"2509.02645","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-09-02T10:53:14Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"607eff128d48c388083886ee820b9bc6e2f6ea2ae8d936d2721d405a0a74f5d5","abstract_canon_sha256":"2d708b8b6b9ef6a7413e78ca5ff917bcfaa8ab15126abcbcab609289ff5937ff"},"schema_version":"1.0"},"canonical_sha256":"26cacd27c7ffc6de14fe10913e6a9845358f76614574ab6aa9e28defdca17480","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:03:54.794260Z","signature_b64":"PyR7p69j2jvDo/C92cmJFpz0UgaexqF4xqVZB3zImwTRqTgIdTMkKSSQTsVSHgumLDrT7bBTdcTV38OiK0XdDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"26cacd27c7ffc6de14fe10913e6a9845358f76614574ab6aa9e28defdca17480","last_reissued_at":"2026-07-05T12:03:54.793835Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:03:54.793835Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2509.02645","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":"2026-07-05T12:03:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nfWjAS0zamC6Mzoj2Ud4Z5Ukr5VKeCrK+X7VPmzu8xRy8ELD56k/rfuiOWXXHxFNflpb05AxqC2JB3dg9bCVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T08:18:20.540763Z"},"content_sha256":"7e50706c637769cb6f8a2bbd1dcb43eff8b4095f5dab83fbaa71bb7aa214295e","schema_version":"1.0","event_id":"sha256:7e50706c637769cb6f8a2bbd1dcb43eff8b4095f5dab83fbaa71bb7aa214295e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:E3FM2J6H77DN4FH6CCIT42UYIU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revised classification of the CHIME fast radio bursts with machine learning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.IM","authors_text":"Hai-Nan Lin, Liang Liu, Li Tang","submitted_at":"2025-09-02T10:53:14Z","abstract_excerpt":"Fast radio bursts (FRBs) are short-duration and energetic radio transients of unknown origin. Observationally, they are commonly categorized into repeaters and non-repeaters. However, this binary classification may be influenced by observational limitations such as sensitivity and time coverage of telescopes. In this work, we employ unsupervised machine learning techniques to re-examine the CHIME/FRB catalog, with the goal of identifying intrinsic groupings in the FRB population without relying on preassigned labels. Using t-distributed stochastic neighbor embedding (t-SNE) for dimensionality "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.02645","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/2509.02645/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":"2026-07-05T12:03:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V94Ly2mc08g9yHLpL53+sFG1Zal0SEJNZ4ORFGstEg2LocDej6ZmJE4+2Oy/eZUROZkv78mbdNKpqlak6AqZCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T08:18:20.541374Z"},"content_sha256":"7ba8c99e89b052018d7f118976bc90bcd0be62acb1d0277624cee979c2d3104f","schema_version":"1.0","event_id":"sha256:7ba8c99e89b052018d7f118976bc90bcd0be62acb1d0277624cee979c2d3104f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E3FM2J6H77DN4FH6CCIT42UYIU/bundle.json","state_url":"https://pith.science/pith/E3FM2J6H77DN4FH6CCIT42UYIU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E3FM2J6H77DN4FH6CCIT42UYIU/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":"2026-08-14T08:18:20Z","links":{"resolver":"https://pith.science/pith/E3FM2J6H77DN4FH6CCIT42UYIU","bundle":"https://pith.science/pith/E3FM2J6H77DN4FH6CCIT42UYIU/bundle.json","state":"https://pith.science/pith/E3FM2J6H77DN4FH6CCIT42UYIU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E3FM2J6H77DN4FH6CCIT42UYIU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:E3FM2J6H77DN4FH6CCIT42UYIU","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":"2d708b8b6b9ef6a7413e78ca5ff917bcfaa8ab15126abcbcab609289ff5937ff","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-09-02T10:53:14Z","title_canon_sha256":"607eff128d48c388083886ee820b9bc6e2f6ea2ae8d936d2721d405a0a74f5d5"},"schema_version":"1.0","source":{"id":"2509.02645","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.02645","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"arxiv_version","alias_value":"2509.02645v1","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.02645","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"pith_short_12","alias_value":"E3FM2J6H77DN","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"pith_short_16","alias_value":"E3FM2J6H77DN4FH6","created_at":"2026-07-05T12:03:54Z"},{"alias_kind":"pith_short_8","alias_value":"E3FM2J6H","created_at":"2026-07-05T12:03:54Z"}],"graph_snapshots":[{"event_id":"sha256:7ba8c99e89b052018d7f118976bc90bcd0be62acb1d0277624cee979c2d3104f","target":"graph","created_at":"2026-07-05T12:03:54Z","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/2509.02645/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Fast radio bursts (FRBs) are short-duration and energetic radio transients of unknown origin. Observationally, they are commonly categorized into repeaters and non-repeaters. However, this binary classification may be influenced by observational limitations such as sensitivity and time coverage of telescopes. In this work, we employ unsupervised machine learning techniques to re-examine the CHIME/FRB catalog, with the goal of identifying intrinsic groupings in the FRB population without relying on preassigned labels. Using t-distributed stochastic neighbor embedding (t-SNE) for dimensionality ","authors_text":"Hai-Nan Lin, Liang Liu, Li Tang","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-09-02T10:53:14Z","title":"Revised classification of the CHIME fast radio bursts with machine learning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.02645","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":"sha256:7e50706c637769cb6f8a2bbd1dcb43eff8b4095f5dab83fbaa71bb7aa214295e","target":"record","created_at":"2026-07-05T12:03:54Z","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":"2d708b8b6b9ef6a7413e78ca5ff917bcfaa8ab15126abcbcab609289ff5937ff","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-09-02T10:53:14Z","title_canon_sha256":"607eff128d48c388083886ee820b9bc6e2f6ea2ae8d936d2721d405a0a74f5d5"},"schema_version":"1.0","source":{"id":"2509.02645","kind":"arxiv","version":1}},"canonical_sha256":"26cacd27c7ffc6de14fe10913e6a9845358f76614574ab6aa9e28defdca17480","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"26cacd27c7ffc6de14fe10913e6a9845358f76614574ab6aa9e28defdca17480","first_computed_at":"2026-07-05T12:03:54.793835Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:03:54.793835Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PyR7p69j2jvDo/C92cmJFpz0UgaexqF4xqVZB3zImwTRqTgIdTMkKSSQTsVSHgumLDrT7bBTdcTV38OiK0XdDw==","signature_status":"signed_v1","signed_at":"2026-07-05T12:03:54.794260Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.02645","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e50706c637769cb6f8a2bbd1dcb43eff8b4095f5dab83fbaa71bb7aa214295e","sha256:7ba8c99e89b052018d7f118976bc90bcd0be62acb1d0277624cee979c2d3104f"],"state_sha256":"5c126d43a2973cf0758ec02d2194ecaad4575b3a26a574c962274df996d631ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e7pR9sSvDsfyy5rpC2KONU/qYG2lK/klMWIeV+NR22Dy2J2t2p4FVXk8CRei3b91i7Ya3E/RPIQ7O3pEPOdICg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T08:18:20.546976Z","bundle_sha256":"0839384cc7d4d9c399e692645e1f14d3137ee5f338859c90915e2a287ce50826"}}