{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:IZK7JTTCVDMTX4ZIIXJ2POTK55","short_pith_number":"pith:IZK7JTTC","canonical_record":{"source":{"id":"0911.0502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-03T05:20:31Z","cross_cats_sorted":[],"title_canon_sha256":"123cb6499b6996b4d66baa7e05c4296001002f7cbe92ca502ea07ba86874af3e","abstract_canon_sha256":"ee4e7c2e5af171fd8ab4288973447968217bc73a31d1dff2356f4cfec854352c"},"schema_version":"1.0"},"canonical_sha256":"4655f4ce62a8d93bf32845d3a7ba6aef54d0323579bba4a57f19dab3385b4e94","source":{"kind":"arxiv","id":"0911.0502","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.0502","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"arxiv_version","alias_value":"0911.0502v1","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.0502","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"pith_short_12","alias_value":"IZK7JTTCVDMT","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"IZK7JTTCVDMTX4ZI","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"IZK7JTTC","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:IZK7JTTCVDMTX4ZIIXJ2POTK55","target":"record","payload":{"canonical_record":{"source":{"id":"0911.0502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-03T05:20:31Z","cross_cats_sorted":[],"title_canon_sha256":"123cb6499b6996b4d66baa7e05c4296001002f7cbe92ca502ea07ba86874af3e","abstract_canon_sha256":"ee4e7c2e5af171fd8ab4288973447968217bc73a31d1dff2356f4cfec854352c"},"schema_version":"1.0"},"canonical_sha256":"4655f4ce62a8d93bf32845d3a7ba6aef54d0323579bba4a57f19dab3385b4e94","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:00.315179Z","signature_b64":"hrwRL0yc7hZNDmncTD+UlJGujbytZYv5ZoxtzwibBWTuKLhxdB/HoGPIJk0S35BIek4R2o7O5dI4avvHPLM/Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4655f4ce62a8d93bf32845d3a7ba6aef54d0323579bba4a57f19dab3385b4e94","last_reissued_at":"2026-05-18T02:11:00.314485Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:00.314485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.0502","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":"2026-05-18T02:11:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ans13id4l6Q5wRiJXuHqlvoVVXkwFIMwgORvWKohLb1UuG+yFTr/7QNWRyvL0dsJDqAXHvQPGXrh3PtokKneDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:01:14.554256Z"},"content_sha256":"c8b52c8b781af5095bf109fe2599ba9c8038157553adce89f227345a8ead2389","schema_version":"1.0","event_id":"sha256:c8b52c8b781af5095bf109fe2599ba9c8038157553adce89f227345a8ead2389"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:IZK7JTTCVDMTX4ZIIXJ2POTK55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pulsar magnetic alignment and the pulsewidth-age relation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"David G. Blair, Lee S. Chan, Matthew D. T. Young, Ron R. Burman","submitted_at":"2009-11-03T05:20:31Z","abstract_excerpt":"Using pulsewidth data for 872 isolated radio pulsars we test the hypothesis that pulsars evolve through a progressive narrowing of the emission cone combined with progressive alignment of the spin and magnetic axes. The new data provide strong evidence for the alignment over a time-scale of about 1 Myr with a log standard deviation of around 0.8 across the observed population. This time-scale is shorter than the time-scale of about 10 Myr found by previous authors, but the log standard deviation is larger. The results are inconsistent with models based on magnetic field decay alone or monotoni"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.0502","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":""},"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":"2026-05-18T02:11:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"809/e1/4CP2G4tFUpyVcNEgp4QvFXKsUSbxa5cnYfYWvpIBLVOE2wb1KNc5GaqyXUWNOyIVP93US+5rf3RuuDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:01:14.554927Z"},"content_sha256":"40cbc1101dc8a5876770a1ef7a4692088a726aeacda989eb75436bccf2923ae6","schema_version":"1.0","event_id":"sha256:40cbc1101dc8a5876770a1ef7a4692088a726aeacda989eb75436bccf2923ae6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IZK7JTTCVDMTX4ZIIXJ2POTK55/bundle.json","state_url":"https://pith.science/pith/IZK7JTTCVDMTX4ZIIXJ2POTK55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IZK7JTTCVDMTX4ZIIXJ2POTK55/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":"2026-05-28T00:01:14Z","links":{"resolver":"https://pith.science/pith/IZK7JTTCVDMTX4ZIIXJ2POTK55","bundle":"https://pith.science/pith/IZK7JTTCVDMTX4ZIIXJ2POTK55/bundle.json","state":"https://pith.science/pith/IZK7JTTCVDMTX4ZIIXJ2POTK55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IZK7JTTCVDMTX4ZIIXJ2POTK55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:IZK7JTTCVDMTX4ZIIXJ2POTK55","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":"ee4e7c2e5af171fd8ab4288973447968217bc73a31d1dff2356f4cfec854352c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-03T05:20:31Z","title_canon_sha256":"123cb6499b6996b4d66baa7e05c4296001002f7cbe92ca502ea07ba86874af3e"},"schema_version":"1.0","source":{"id":"0911.0502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.0502","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"arxiv_version","alias_value":"0911.0502v1","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.0502","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"pith_short_12","alias_value":"IZK7JTTCVDMT","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"IZK7JTTCVDMTX4ZI","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"IZK7JTTC","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:40cbc1101dc8a5876770a1ef7a4692088a726aeacda989eb75436bccf2923ae6","target":"graph","created_at":"2026-05-18T02:11:00Z","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"},"paper":{"abstract_excerpt":"Using pulsewidth data for 872 isolated radio pulsars we test the hypothesis that pulsars evolve through a progressive narrowing of the emission cone combined with progressive alignment of the spin and magnetic axes. The new data provide strong evidence for the alignment over a time-scale of about 1 Myr with a log standard deviation of around 0.8 across the observed population. This time-scale is shorter than the time-scale of about 10 Myr found by previous authors, but the log standard deviation is larger. The results are inconsistent with models based on magnetic field decay alone or monotoni","authors_text":"David G. Blair, Lee S. Chan, Matthew D. T. Young, Ron R. Burman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-03T05:20:31Z","title":"Pulsar magnetic alignment and the pulsewidth-age relation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.0502","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:c8b52c8b781af5095bf109fe2599ba9c8038157553adce89f227345a8ead2389","target":"record","created_at":"2026-05-18T02:11:00Z","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":"ee4e7c2e5af171fd8ab4288973447968217bc73a31d1dff2356f4cfec854352c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-11-03T05:20:31Z","title_canon_sha256":"123cb6499b6996b4d66baa7e05c4296001002f7cbe92ca502ea07ba86874af3e"},"schema_version":"1.0","source":{"id":"0911.0502","kind":"arxiv","version":1}},"canonical_sha256":"4655f4ce62a8d93bf32845d3a7ba6aef54d0323579bba4a57f19dab3385b4e94","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4655f4ce62a8d93bf32845d3a7ba6aef54d0323579bba4a57f19dab3385b4e94","first_computed_at":"2026-05-18T02:11:00.314485Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:00.314485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hrwRL0yc7hZNDmncTD+UlJGujbytZYv5ZoxtzwibBWTuKLhxdB/HoGPIJk0S35BIek4R2o7O5dI4avvHPLM/Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:00.315179Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.0502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8b52c8b781af5095bf109fe2599ba9c8038157553adce89f227345a8ead2389","sha256:40cbc1101dc8a5876770a1ef7a4692088a726aeacda989eb75436bccf2923ae6"],"state_sha256":"5ce22cb6a8f332900faafa36916d689e2473416625dacc9dd27ca2fc3d2252bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AkyTi0o7Pvvfhn+VVAjVisvWQ0cDTeg4C7L9lUEuOtmX9vJAXhsNSdK1dPzslpGdklahS9LgtQ/qEguCFkGsDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T00:01:14.558279Z","bundle_sha256":"df57455c05078cad330b3e39f7d6735010743921dbe07174869e95cb43331c03"}}