{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:Y3APCF6KJH4HK6UMOTW3T5BDC3","short_pith_number":"pith:Y3APCF6K","canonical_record":{"source":{"id":"2201.00624","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-24T11:17:10Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c9c821935085652c6ac2912bf4cc0d84a423c64991d1321f31a4ba4acee8ae9a","abstract_canon_sha256":"84e610b66f2324f88e7cb12d6712757e3399cd1f1f85229cd578c0bed30a3e94"},"schema_version":"1.0"},"canonical_sha256":"c6c0f117ca49f8757a8c74edb9f42316e155e8a632dee7e9c4677ce44ab6ae21","source":{"kind":"arxiv","id":"2201.00624","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.00624","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"arxiv_version","alias_value":"2201.00624v2","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.00624","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"pith_short_12","alias_value":"Y3APCF6KJH4H","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"Y3APCF6KJH4HK6UM","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"Y3APCF6K","created_at":"2026-07-05T05:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:Y3APCF6KJH4HK6UMOTW3T5BDC3","target":"record","payload":{"canonical_record":{"source":{"id":"2201.00624","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-24T11:17:10Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c9c821935085652c6ac2912bf4cc0d84a423c64991d1321f31a4ba4acee8ae9a","abstract_canon_sha256":"84e610b66f2324f88e7cb12d6712757e3399cd1f1f85229cd578c0bed30a3e94"},"schema_version":"1.0"},"canonical_sha256":"c6c0f117ca49f8757a8c74edb9f42316e155e8a632dee7e9c4677ce44ab6ae21","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:33:07.676526Z","signature_b64":"gYfbYBqM6wod5a1+Rht3qRtNQSmSDvja18Sx4hVsC7B6Q677io//2AEJqKpK2ggBbQNF/lSaic0QlCnKRXjrDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6c0f117ca49f8757a8c74edb9f42316e155e8a632dee7e9c4677ce44ab6ae21","last_reissued_at":"2026-07-05T05:33:07.676109Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:33:07.676109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.00624","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":"2026-07-05T05:33:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DFQTfVuYjqKZC5Tm4LEf0S8F8HBCXbI3Iju6dsVEPX7f+Fz3sOsl4L1HtbuG4njtklcPBKmGBzhEfWL3thsfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T01:39:45.957683Z"},"content_sha256":"2e5097ea126168889929077ee02a3683d52902ae018c70ae8b71486bd9aef7f7","schema_version":"1.0","event_id":"sha256:2e5097ea126168889929077ee02a3683d52902ae018c70ae8b71486bd9aef7f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:Y3APCF6KJH4HK6UMOTW3T5BDC3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Single-pulse studies of three millisecond pulsars","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"B. B. P. Perera, G. L. Siebert, M. A. McLaughlin, N. T. Palliyaguru, S. Oslowski","submitted_at":"2021-12-24T11:17:10Z","abstract_excerpt":"Single-pulse studies are important to understand the pulsar emission mechanism and the noise floor in precision timing. We study total intensity and polarimetry properties of three bright millisecond pulsars - PSRs J1022+1001, J1713+0747, and B1855+09 - that have detectable single pulses at multiple frequencies. We report for the first time the detection of single pulses from PSRs J1022+1001 and J1713+0747 at 4.5 GHz. In addition, for those two pulsars the fraction of linear polarization in the average profile is significantly reduced at 4.5 GHz, compared to 1.38 GHz, which could support the e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.00624","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/2201.00624/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":"2026-07-05T05:33:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PQkkSEt55OkCwj4yKbO/x0XGF1r9ChgCEnjy4ImHUUgDy/K18UkL8EZ7zww4a6RKFlxNnrKltMHk5o6KmDUiDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T01:39:45.958624Z"},"content_sha256":"281fa23428aedcc9a115643953726fc7bdb8a5972daae7da8ddea2097df9dd2e","schema_version":"1.0","event_id":"sha256:281fa23428aedcc9a115643953726fc7bdb8a5972daae7da8ddea2097df9dd2e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y3APCF6KJH4HK6UMOTW3T5BDC3/bundle.json","state_url":"https://pith.science/pith/Y3APCF6KJH4HK6UMOTW3T5BDC3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y3APCF6KJH4HK6UMOTW3T5BDC3/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":"2026-08-14T01:39:45Z","links":{"resolver":"https://pith.science/pith/Y3APCF6KJH4HK6UMOTW3T5BDC3","bundle":"https://pith.science/pith/Y3APCF6KJH4HK6UMOTW3T5BDC3/bundle.json","state":"https://pith.science/pith/Y3APCF6KJH4HK6UMOTW3T5BDC3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y3APCF6KJH4HK6UMOTW3T5BDC3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:Y3APCF6KJH4HK6UMOTW3T5BDC3","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":"84e610b66f2324f88e7cb12d6712757e3399cd1f1f85229cd578c0bed30a3e94","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-24T11:17:10Z","title_canon_sha256":"c9c821935085652c6ac2912bf4cc0d84a423c64991d1321f31a4ba4acee8ae9a"},"schema_version":"1.0","source":{"id":"2201.00624","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.00624","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"arxiv_version","alias_value":"2201.00624v2","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.00624","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"pith_short_12","alias_value":"Y3APCF6KJH4H","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"Y3APCF6KJH4HK6UM","created_at":"2026-07-05T05:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"Y3APCF6K","created_at":"2026-07-05T05:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:281fa23428aedcc9a115643953726fc7bdb8a5972daae7da8ddea2097df9dd2e","target":"graph","created_at":"2026-07-05T05:33:07Z","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/2201.00624/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Single-pulse studies are important to understand the pulsar emission mechanism and the noise floor in precision timing. We study total intensity and polarimetry properties of three bright millisecond pulsars - PSRs J1022+1001, J1713+0747, and B1855+09 - that have detectable single pulses at multiple frequencies. We report for the first time the detection of single pulses from PSRs J1022+1001 and J1713+0747 at 4.5 GHz. In addition, for those two pulsars the fraction of linear polarization in the average profile is significantly reduced at 4.5 GHz, compared to 1.38 GHz, which could support the e","authors_text":"B. B. P. Perera, G. L. Siebert, M. A. McLaughlin, N. T. Palliyaguru, S. Oslowski","cross_cats":["astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-24T11:17:10Z","title":"Single-pulse studies of three millisecond pulsars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.00624","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":"sha256:2e5097ea126168889929077ee02a3683d52902ae018c70ae8b71486bd9aef7f7","target":"record","created_at":"2026-07-05T05:33:07Z","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":"84e610b66f2324f88e7cb12d6712757e3399cd1f1f85229cd578c0bed30a3e94","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-24T11:17:10Z","title_canon_sha256":"c9c821935085652c6ac2912bf4cc0d84a423c64991d1321f31a4ba4acee8ae9a"},"schema_version":"1.0","source":{"id":"2201.00624","kind":"arxiv","version":2}},"canonical_sha256":"c6c0f117ca49f8757a8c74edb9f42316e155e8a632dee7e9c4677ce44ab6ae21","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6c0f117ca49f8757a8c74edb9f42316e155e8a632dee7e9c4677ce44ab6ae21","first_computed_at":"2026-07-05T05:33:07.676109Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:33:07.676109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gYfbYBqM6wod5a1+Rht3qRtNQSmSDvja18Sx4hVsC7B6Q677io//2AEJqKpK2ggBbQNF/lSaic0QlCnKRXjrDA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:33:07.676526Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.00624","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e5097ea126168889929077ee02a3683d52902ae018c70ae8b71486bd9aef7f7","sha256:281fa23428aedcc9a115643953726fc7bdb8a5972daae7da8ddea2097df9dd2e"],"state_sha256":"028a68ff15cdb570098e812f4451cacf9eb4854006defba3fd53f7d9125689b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RWD1Y6K14862k29BUvYIMapi2e0Swol8E7TUFLJTyH/naOAeZHz1tC3jkJRsYvnuzd3yuB0zJeUCTeFftAQNBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T01:39:45.964787Z","bundle_sha256":"9b7a0c1a213208d0e660ec8396f1516dfebea74bf7c226856ce4c1b0bfdc0407"}}