{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:PC5XSFFAQXEOFTBSF7BTUPAZEO","short_pith_number":"pith:PC5XSFFA","canonical_record":{"source":{"id":"2306.16226","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-28T13:51:14Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"title_canon_sha256":"65e3b5aef158cd279e41316917099ea98c0010988013a711a901f2f8c916b9d4","abstract_canon_sha256":"f93ca59cb3049433cb0d72bb039cd99ffe22a5175557447501a892bc7b7ec0de"},"schema_version":"1.0"},"canonical_sha256":"78bb7914a085c8e2cc322fc33a3c1923aae68c14f1aa1791b3643f0b47cdbba0","source":{"kind":"arxiv","id":"2306.16226","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.16226","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"arxiv_version","alias_value":"2306.16226v3","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.16226","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"pith_short_12","alias_value":"PC5XSFFAQXEO","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"pith_short_16","alias_value":"PC5XSFFAQXEOFTBS","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"pith_short_8","alias_value":"PC5XSFFA","created_at":"2026-07-05T09:17:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:PC5XSFFAQXEOFTBSF7BTUPAZEO","target":"record","payload":{"canonical_record":{"source":{"id":"2306.16226","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-28T13:51:14Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"title_canon_sha256":"65e3b5aef158cd279e41316917099ea98c0010988013a711a901f2f8c916b9d4","abstract_canon_sha256":"f93ca59cb3049433cb0d72bb039cd99ffe22a5175557447501a892bc7b7ec0de"},"schema_version":"1.0"},"canonical_sha256":"78bb7914a085c8e2cc322fc33a3c1923aae68c14f1aa1791b3643f0b47cdbba0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:17:06.216435Z","signature_b64":"9X8vrn26wd6WZxMR+ZI4zmREegfg6lBHClqxRRosmrhOa02wpFvNmOm9vKbRtHQlC4Ni/zcaR6GIMjXpc9TeBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78bb7914a085c8e2cc322fc33a3c1923aae68c14f1aa1791b3643f0b47cdbba0","last_reissued_at":"2026-07-05T09:17:06.215915Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:17:06.215915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2306.16226","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:17:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UGQ4jolRz2fGWUxmCBzt3qGPxlvCiDEkmvAOY4NXqm4Wb4KbY52y60OiOe1aW+qHm0Uk09aJR8D8dvVVCONqDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T12:22:24.363135Z"},"content_sha256":"d1065e743e6cab52b7a5d691df0662aa6606d75c38fe1039752793e2ba612069","schema_version":"1.0","event_id":"sha256:d1065e743e6cab52b7a5d691df0662aa6606d75c38fe1039752793e2ba612069"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:PC5XSFFAQXEOFTBSF7BTUPAZEO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The second data release from the European Pulsar Timing Array V. Search for continuous gravitational wave signals","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.GA","gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"A. Bathula, A. Berthereau, A. Chalumeau, A. Franchini, A. G. Lyne, A. Gopakumar, A. Jessner, A. K. Paladi, A. Parthasarathy, A. Petiteau, A. Possenti, A. Samajdar, A. S. Bak Nielsen, A. Sesana, A. Srivastava, A. Susobhanan, A. Vecchio, B. B. P. Perera, B. C. Joshi, B. Goncharov, B. W. Stappers, C. Dwivedi, C. G. Bassa, C. Tiburzi, D. Deb, D. Izquierdo-Villalba, D. J. Champion, D. Kharbanda, D. Perrodin, E. Bortolas, E. F. Keane, E. Graikou, E. van der Wateren, F. Iraci, F. Kareem, G. Desvignes, G. H. Janssen, G. Shaifullah, G. Theureau, H. Hu, H. Quelquejay Leclere, I. C. Nitu, I. Cognard, I. Ferranti, J. Antoniadis, J. Jang, J. Jawor, J. M. Grie{\\ss}meier, J. P. W. Verbiest, J. R. Gair, J. Singha, J. Wang, J. W. McKee, K. J. Lee, K. Lackeos, K. Liu, K. Nobleson, K. Takahashi, L. Guillemot, L. Speri, L. Wang, M. A. Krishnakumar, M. Bagchi, M. B. Mickaliger, M. Bonetti, M. Burgay, M. Falxa, M. J. Keith, M. Kramer, M. Surnis, N. Dhanda-Batra, N. Kolhe, N. K. Porayko, P. Arumugam, P. Rana, P. R. Brook, P. Tarafdar, R. A. Main, R. D. Ferdman, R. Karuppusamy, R. N. Caballero, R. Spiewak, S. Arumugam, S. A. Sanidas, S. Babak, S. Chanlaridis, S. Chen, S. C. Susarla, S. Dandapat, S. Desai, S. Hisano, S. Manzini, T. Kikunaga, T. Prabu, V. Venkatraman Krishnan, Y. Gupta, Y. J. Guo, Y. Liu, Y. Maan, Z. Wu","submitted_at":"2023-06-28T13:51:14Z","abstract_excerpt":"We present the results of a search for continuous gravitational wave signals (CGWs) in the second data release (DR2) of the European Pulsar Timing Array (EPTA) collaboration. The most significant candidate event from this search has a gravitational wave frequency of 4-5 nHz. Such a signal could be generated by a supermassive black hole binary (SMBHB) in the local Universe. We present the results of a follow-up analysis of this candidate using both Bayesian and frequentist methods. The Bayesian analysis gives a Bayes factor of 4 in favor of the presence of the CGW over a common uncorrelated noi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.16226","kind":"arxiv","version":3},"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/2306.16226/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":"2026-07-05T09:17:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"StO6y2CMnLFy85dGa4/F7p0LvLMddr7iPjOXSHmK83yWYEY+fG+gbNfCBGd4Lsys1bQTbeC8LD/k7tKTu84uCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T12:22:24.363544Z"},"content_sha256":"0aa8db4c7ceccdeb535a319f4284a4cf061d8a776250f0f8812e76697fe34900","schema_version":"1.0","event_id":"sha256:0aa8db4c7ceccdeb535a319f4284a4cf061d8a776250f0f8812e76697fe34900"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PC5XSFFAQXEOFTBSF7BTUPAZEO/bundle.json","state_url":"https://pith.science/pith/PC5XSFFAQXEOFTBSF7BTUPAZEO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PC5XSFFAQXEOFTBSF7BTUPAZEO/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":"2026-07-17T12:22:24Z","links":{"resolver":"https://pith.science/pith/PC5XSFFAQXEOFTBSF7BTUPAZEO","bundle":"https://pith.science/pith/PC5XSFFAQXEOFTBSF7BTUPAZEO/bundle.json","state":"https://pith.science/pith/PC5XSFFAQXEOFTBSF7BTUPAZEO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PC5XSFFAQXEOFTBSF7BTUPAZEO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:PC5XSFFAQXEOFTBSF7BTUPAZEO","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":"f93ca59cb3049433cb0d72bb039cd99ffe22a5175557447501a892bc7b7ec0de","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-28T13:51:14Z","title_canon_sha256":"65e3b5aef158cd279e41316917099ea98c0010988013a711a901f2f8c916b9d4"},"schema_version":"1.0","source":{"id":"2306.16226","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.16226","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"arxiv_version","alias_value":"2306.16226v3","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.16226","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"pith_short_12","alias_value":"PC5XSFFAQXEO","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"pith_short_16","alias_value":"PC5XSFFAQXEOFTBS","created_at":"2026-07-05T09:17:06Z"},{"alias_kind":"pith_short_8","alias_value":"PC5XSFFA","created_at":"2026-07-05T09:17:06Z"}],"graph_snapshots":[{"event_id":"sha256:0aa8db4c7ceccdeb535a319f4284a4cf061d8a776250f0f8812e76697fe34900","target":"graph","created_at":"2026-07-05T09:17:06Z","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/2306.16226/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the results of a search for continuous gravitational wave signals (CGWs) in the second data release (DR2) of the European Pulsar Timing Array (EPTA) collaboration. The most significant candidate event from this search has a gravitational wave frequency of 4-5 nHz. Such a signal could be generated by a supermassive black hole binary (SMBHB) in the local Universe. We present the results of a follow-up analysis of this candidate using both Bayesian and frequentist methods. The Bayesian analysis gives a Bayes factor of 4 in favor of the presence of the CGW over a common uncorrelated noi","authors_text":"A. Bathula, A. Berthereau, A. Chalumeau, A. Franchini, A. G. Lyne, A. Gopakumar, A. Jessner, A. K. Paladi, A. Parthasarathy, A. Petiteau, A. Possenti, A. Samajdar, A. S. Bak Nielsen, A. Sesana, A. Srivastava, A. Susobhanan, A. Vecchio, B. B. P. Perera, B. C. Joshi, B. Goncharov, B. W. Stappers, C. Dwivedi, C. G. Bassa, C. Tiburzi, D. Deb, D. Izquierdo-Villalba, D. J. Champion, D. Kharbanda, D. Perrodin, E. Bortolas, E. F. Keane, E. Graikou, E. van der Wateren, F. Iraci, F. Kareem, G. Desvignes, G. H. Janssen, G. Shaifullah, G. Theureau, H. Hu, H. Quelquejay Leclere, I. C. Nitu, I. Cognard, I. Ferranti, J. Antoniadis, J. Jang, J. Jawor, J. M. Grie{\\ss}meier, J. P. W. Verbiest, J. R. Gair, J. Singha, J. Wang, J. W. McKee, K. J. Lee, K. Lackeos, K. Liu, K. Nobleson, K. Takahashi, L. Guillemot, L. Speri, L. Wang, M. A. Krishnakumar, M. Bagchi, M. B. Mickaliger, M. Bonetti, M. Burgay, M. Falxa, M. J. Keith, M. Kramer, M. Surnis, N. Dhanda-Batra, N. Kolhe, N. K. Porayko, P. Arumugam, P. Rana, P. R. Brook, P. Tarafdar, R. A. Main, R. D. Ferdman, R. Karuppusamy, R. N. Caballero, R. Spiewak, S. Arumugam, S. A. Sanidas, S. Babak, S. Chanlaridis, S. Chen, S. C. Susarla, S. Dandapat, S. Desai, S. Hisano, S. Manzini, T. Kikunaga, T. Prabu, V. Venkatraman Krishnan, Y. Gupta, Y. J. Guo, Y. Liu, Y. Maan, Z. Wu","cross_cats":["astro-ph.CO","astro-ph.GA","gr-qc"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-28T13:51:14Z","title":"The second data release from the European Pulsar Timing Array V. Search for continuous gravitational wave signals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.16226","kind":"arxiv","version":3},"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:d1065e743e6cab52b7a5d691df0662aa6606d75c38fe1039752793e2ba612069","target":"record","created_at":"2026-07-05T09:17:06Z","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":"f93ca59cb3049433cb0d72bb039cd99ffe22a5175557447501a892bc7b7ec0de","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-28T13:51:14Z","title_canon_sha256":"65e3b5aef158cd279e41316917099ea98c0010988013a711a901f2f8c916b9d4"},"schema_version":"1.0","source":{"id":"2306.16226","kind":"arxiv","version":3}},"canonical_sha256":"78bb7914a085c8e2cc322fc33a3c1923aae68c14f1aa1791b3643f0b47cdbba0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"78bb7914a085c8e2cc322fc33a3c1923aae68c14f1aa1791b3643f0b47cdbba0","first_computed_at":"2026-07-05T09:17:06.215915Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:17:06.215915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9X8vrn26wd6WZxMR+ZI4zmREegfg6lBHClqxRRosmrhOa02wpFvNmOm9vKbRtHQlC4Ni/zcaR6GIMjXpc9TeBg==","signature_status":"signed_v1","signed_at":"2026-07-05T09:17:06.216435Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.16226","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d1065e743e6cab52b7a5d691df0662aa6606d75c38fe1039752793e2ba612069","sha256:0aa8db4c7ceccdeb535a319f4284a4cf061d8a776250f0f8812e76697fe34900"],"state_sha256":"58b551e182d26aaace79c51a4fb547109568146ca6d64a48679a5c61826de2cd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7KNYYjWjgPQeRxcKzx12Y3UY4tP816jxCqDBBe3D44nQrzyyRt62nE5uDhyRocNjXe7V7t3qyithtSGCMa4RCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-17T12:22:24.365887Z","bundle_sha256":"acac02b454c29a90552bad37a638fdc6c1113809b8813356a93e348a924c14d0"}}