{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:Y7MGCS7Y6LYT3CB5ZV4LVFHBK3","short_pith_number":"pith:Y7MGCS7Y","canonical_record":{"source":{"id":"2608.07312","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-08-07T15:07:41Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"a15513f9386359fefb22304b368b49aa6ce960b07acb7701f556d7cf03107e5d","abstract_canon_sha256":"eb3f1ff419ed22cdd33ae8652bc8b05039cfb964bb90607addf6a3d38a0a81c7"},"schema_version":"1.0"},"canonical_sha256":"c7d8614bf8f2f13d883dcd78ba94e156c8b636ab98cde0c3d1d997cf0a82e991","source":{"kind":"arxiv","id":"2608.07312","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.07312","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"arxiv_version","alias_value":"2608.07312v1","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.07312","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"pith_short_12","alias_value":"Y7MGCS7Y6LYT","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y7MGCS7Y6LYT3CB5","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y7MGCS7Y","created_at":"2026-08-10T01:14:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:Y7MGCS7Y6LYT3CB5ZV4LVFHBK3","target":"record","payload":{"canonical_record":{"source":{"id":"2608.07312","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-08-07T15:07:41Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"a15513f9386359fefb22304b368b49aa6ce960b07acb7701f556d7cf03107e5d","abstract_canon_sha256":"eb3f1ff419ed22cdd33ae8652bc8b05039cfb964bb90607addf6a3d38a0a81c7"},"schema_version":"1.0"},"canonical_sha256":"c7d8614bf8f2f13d883dcd78ba94e156c8b636ab98cde0c3d1d997cf0a82e991","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-10T01:14:57.227399Z","signature_b64":"O6rWhu+9dWBjdv46+2YL5VfXE3expCYA0sCJ38FzG30WWfjn5/+gewO2CRQm0vJGWPU1smhxD9aNR0SQRt5GDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c7d8614bf8f2f13d883dcd78ba94e156c8b636ab98cde0c3d1d997cf0a82e991","last_reissued_at":"2026-08-10T01:14:57.224890Z","signature_status":"signed_v1","first_computed_at":"2026-08-10T01:14:57.224890Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.07312","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":"2026-08-10T01:14:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jiIqKAzz+uXMmj2GQF07onnwyAKsnD/P+BvbD5CZr0TcbcMDv9a31kHAGlcV5sH9/i5u0sTjzAOxr0HroCw3Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T13:55:22.921710Z"},"content_sha256":"a6264525672d0c1267666e7dab10f86a03e6ec222356cafaa6d15676c6dc5a9a","schema_version":"1.0","event_id":"sha256:a6264525672d0c1267666e7dab10f86a03e6ec222356cafaa6d15676c6dc5a9a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:Y7MGCS7Y6LYT3CB5ZV4LVFHBK3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spotlight searches for continuous gravitational waves triggered on radiometer candidates in LIGO O4a data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"gr-qc","authors_text":"Alan M. Knee, Keith Riles, Ling Sun","submitted_at":"2026-08-07T15:07:41Z","abstract_excerpt":"We report on a follow-up search for continuous gravitational waves (CWs) targeting sub-threshold candidates from the O4a LIGO-Virgo-KAGRA (LVK) all-sky all-frequency (ASAF) directed radiometer analysis. We analyze a total of $562$ ASAF candidates using Advanced LIGO data from the first part of the fourth LVK observing run. Each candidate comprises a narrow $1/32$ Hz frequency band paired with a ${\\sim}13$ deg$^2$ sky pixel, defining the search parameter space for our analysis. Our search pipeline leverages the $F$-statistic matched filter equipped with a hidden Markov model to enable tracking "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.07312","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/2608.07312/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":"2026-08-10T01:14:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iJPwtmB4PU8XVE9zMgy9VU2r8b2Hx/IeX9SQT4tyfBnA0v+RuVTBDBPaY/7KmZUdt1Db/x5g2tUATA3H1/QQAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T13:55:22.922234Z"},"content_sha256":"229af66e15ef4cad3dbc47ae0cb3a0ab899b03534c456527b0f19b6b4bd4409a","schema_version":"1.0","event_id":"sha256:229af66e15ef4cad3dbc47ae0cb3a0ab899b03534c456527b0f19b6b4bd4409a"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:Y7MGCS7Y6LYT3CB5ZV4LVFHBK3","target":"integrity","payload":{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.21231/906P-4D78) was visible in the surrounding text but could not be confirmed against doi.org as printed.","snippet":"OSG, OSPool, OSG https://doi.org/10.21231/906P- 4D78 (2006)","arxiv_id":"2608.07312","detector":"doi_compliance","evidence":{"ref_index":97,"verdict_class":"incontrovertible","resolved_title":null,"printed_excerpt":"10.21231/906p-","reconstructed_doi":"10.21231/906P-4D78"},"severity":"advisory","ref_index":97,"audited_at":"2026-08-10T10:38:05.231743Z","event_type":"pith.integrity.v1","detected_doi":"10.21231/906P-4D78","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"recoverable_identifier","evidence_hash":"c052928c89ed82c8f1b6270f423c1b06dfeb0617a58c4f6a6947100281baa233","paper_version":1,"verdict_class":"incontrovertible","resolved_title":null,"detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":18784,"payload_sha256":"66c31f52451361cd3c5d7f700b539b60073cff54cd0068f3f94eed24ab3d10da","signature_b64":"2pzQmcgBVunTW6IaNJUzFtBnqqccdKg7sQ5fz49HeqfganhHlDOnPaplcELUkIaaRTbcglwtogQejX6hMJezAg==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-10T10:38:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b2TaPxq3Q7Zv8uRuaZK73NpWRdotqEmVxyAgKEcmJo7ivzZt42zkoH2i7m9IKKnifJmZQPQxVwAbkz/WWpckDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T13:55:22.925654Z"},"content_sha256":"790a7d3b8e1c1638aadb416fbcbfa34de3208a608d549236d3340d87da621aa7","schema_version":"1.0","event_id":"sha256:790a7d3b8e1c1638aadb416fbcbfa34de3208a608d549236d3340d87da621aa7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y7MGCS7Y6LYT3CB5ZV4LVFHBK3/bundle.json","state_url":"https://pith.science/pith/Y7MGCS7Y6LYT3CB5ZV4LVFHBK3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y7MGCS7Y6LYT3CB5ZV4LVFHBK3/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":"2026-08-11T13:55:22Z","links":{"resolver":"https://pith.science/pith/Y7MGCS7Y6LYT3CB5ZV4LVFHBK3","bundle":"https://pith.science/pith/Y7MGCS7Y6LYT3CB5ZV4LVFHBK3/bundle.json","state":"https://pith.science/pith/Y7MGCS7Y6LYT3CB5ZV4LVFHBK3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y7MGCS7Y6LYT3CB5ZV4LVFHBK3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:Y7MGCS7Y6LYT3CB5ZV4LVFHBK3","merge_version":"pith-open-graph-merge-v1","event_count":3,"valid_event_count":3,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"eb3f1ff419ed22cdd33ae8652bc8b05039cfb964bb90607addf6a3d38a0a81c7","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-08-07T15:07:41Z","title_canon_sha256":"a15513f9386359fefb22304b368b49aa6ce960b07acb7701f556d7cf03107e5d"},"schema_version":"1.0","source":{"id":"2608.07312","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.07312","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"arxiv_version","alias_value":"2608.07312v1","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.07312","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"pith_short_12","alias_value":"Y7MGCS7Y6LYT","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y7MGCS7Y6LYT3CB5","created_at":"2026-08-10T01:14:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y7MGCS7Y","created_at":"2026-08-10T01:14:57Z"}],"graph_snapshots":[{"event_id":"sha256:229af66e15ef4cad3dbc47ae0cb3a0ab899b03534c456527b0f19b6b4bd4409a","target":"graph","created_at":"2026-08-10T01:14:57Z","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/2608.07312/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on a follow-up search for continuous gravitational waves (CWs) targeting sub-threshold candidates from the O4a LIGO-Virgo-KAGRA (LVK) all-sky all-frequency (ASAF) directed radiometer analysis. We analyze a total of $562$ ASAF candidates using Advanced LIGO data from the first part of the fourth LVK observing run. Each candidate comprises a narrow $1/32$ Hz frequency band paired with a ${\\sim}13$ deg$^2$ sky pixel, defining the search parameter space for our analysis. Our search pipeline leverages the $F$-statistic matched filter equipped with a hidden Markov model to enable tracking ","authors_text":"Alan M. Knee, Keith Riles, Ling Sun","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-08-07T15:07:41Z","title":"Spotlight searches for continuous gravitational waves triggered on radiometer candidates in LIGO O4a data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.07312","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:a6264525672d0c1267666e7dab10f86a03e6ec222356cafaa6d15676c6dc5a9a","target":"record","created_at":"2026-08-10T01:14:57Z","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":"eb3f1ff419ed22cdd33ae8652bc8b05039cfb964bb90607addf6a3d38a0a81c7","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2026-08-07T15:07:41Z","title_canon_sha256":"a15513f9386359fefb22304b368b49aa6ce960b07acb7701f556d7cf03107e5d"},"schema_version":"1.0","source":{"id":"2608.07312","kind":"arxiv","version":1}},"canonical_sha256":"c7d8614bf8f2f13d883dcd78ba94e156c8b636ab98cde0c3d1d997cf0a82e991","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c7d8614bf8f2f13d883dcd78ba94e156c8b636ab98cde0c3d1d997cf0a82e991","first_computed_at":"2026-08-10T01:14:57.224890Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-10T01:14:57.224890Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"O6rWhu+9dWBjdv46+2YL5VfXE3expCYA0sCJ38FzG30WWfjn5/+gewO2CRQm0vJGWPU1smhxD9aNR0SQRt5GDA==","signature_status":"signed_v1","signed_at":"2026-08-10T01:14:57.227399Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.07312","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6264525672d0c1267666e7dab10f86a03e6ec222356cafaa6d15676c6dc5a9a","sha256:229af66e15ef4cad3dbc47ae0cb3a0ab899b03534c456527b0f19b6b4bd4409a","sha256:790a7d3b8e1c1638aadb416fbcbfa34de3208a608d549236d3340d87da621aa7"],"state_sha256":"9c93145752e6f9e80afbc0b53c66e036ea561965fa3924e31441ac509a715355"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Pvz/anMRDFchwQYIj4txMtClMp6OdvNjIMCpGMkeVN2V29NQsfz0tGlAd49jbjFs7BoAakdgPG63epXIHlnDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T13:55:22.928524Z","bundle_sha256":"6b94c22b51e30d1b1c66b7bf9dfd360b1cc79c2552ec85ccbb4be65db3f26ac4"}}