{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:QJZXNN6EEXAFVOWKOZ6KTVLZG3","short_pith_number":"pith:QJZXNN6E","canonical_record":{"source":{"id":"1211.5276","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-11-22T12:55:26Z","cross_cats_sorted":[],"title_canon_sha256":"18b8e4751c80a2f85d38021e2ff056cb6cb2ce6f201c3e57c84b9e22ade28b8e","abstract_canon_sha256":"322745d6e9eb9d5c1170f91a08b349e3de6ece05e4c3c51f21ae303856807d66"},"schema_version":"1.0"},"canonical_sha256":"827376b7c425c05abaca767ca9d57936f26d6c0b6a1bf4d8afd08305be98ff20","source":{"kind":"arxiv","id":"1211.5276","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.5276","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"arxiv_version","alias_value":"1211.5276v1","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.5276","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"pith_short_12","alias_value":"QJZXNN6EEXAF","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QJZXNN6EEXAFVOWK","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QJZXNN6E","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:QJZXNN6EEXAFVOWKOZ6KTVLZG3","target":"record","payload":{"canonical_record":{"source":{"id":"1211.5276","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-11-22T12:55:26Z","cross_cats_sorted":[],"title_canon_sha256":"18b8e4751c80a2f85d38021e2ff056cb6cb2ce6f201c3e57c84b9e22ade28b8e","abstract_canon_sha256":"322745d6e9eb9d5c1170f91a08b349e3de6ece05e4c3c51f21ae303856807d66"},"schema_version":"1.0"},"canonical_sha256":"827376b7c425c05abaca767ca9d57936f26d6c0b6a1bf4d8afd08305be98ff20","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:01.552695Z","signature_b64":"XzaG7YbXz5uJktVs1OYycGsLu/tmi0QrlKEDdG0IPHh4qF5TzRJVzK9c+Z/TH54/++Oswr6UzgU/1Y+aAr2QAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"827376b7c425c05abaca767ca9d57936f26d6c0b6a1bf4d8afd08305be98ff20","last_reissued_at":"2026-05-18T01:53:01.552127Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:01.552127Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.5276","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":"2026-05-18T01:53:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YtdqTWKo22JSo045qPCNLBLhbzjg+7AH1pz/nvyRxJLnwER/h71/Qwfwm4br1p245DwcqMSiEknvs1xSRjRqAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:18:37.046588Z"},"content_sha256":"1dea1fdd41448fc3f3e3773b930b3868ebfd9e8b455e18d20b86920f8a724bca","schema_version":"1.0","event_id":"sha256:1dea1fdd41448fc3f3e3773b930b3868ebfd9e8b455e18d20b86920f8a724bca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:QJZXNN6EEXAFVOWKOZ6KTVLZG3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The spin evolution of young pulsars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Cristobal M. Espinoza","submitted_at":"2012-11-22T12:55:26Z","abstract_excerpt":"The current understanding of the spin evolution of young pulsars is reviewed through a compilation of braking index measurements. An immediate conclusion is that the spin evolution of all pulsars with a measured braking index is not purely caused by a constant magnetic dipole. The case of PSR J1734-3333 and its upward movement towards the magnetars is used as a guide to try to understand why pulsars evolve with n < 3. Evolution between different pulsar families, driven by the emergence of a hidden internal magnetic field, appears as one possible picture."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.5276","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":"2026-05-18T01:53:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vukEfjkvV8gCUc7BZGEVGeFaAKSG/ahZvLPyh8gjT9SykGi2vPPNDY+tT0L/OxFRTrW91OaOw0c1on/GPo/gDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T06:18:37.046934Z"},"content_sha256":"0ced2af527f3e970c569c3c42256a66501dc653259a0f368df1539a5e05791d7","schema_version":"1.0","event_id":"sha256:0ced2af527f3e970c569c3c42256a66501dc653259a0f368df1539a5e05791d7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QJZXNN6EEXAFVOWKOZ6KTVLZG3/bundle.json","state_url":"https://pith.science/pith/QJZXNN6EEXAFVOWKOZ6KTVLZG3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QJZXNN6EEXAFVOWKOZ6KTVLZG3/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":"2026-05-28T06:18:37Z","links":{"resolver":"https://pith.science/pith/QJZXNN6EEXAFVOWKOZ6KTVLZG3","bundle":"https://pith.science/pith/QJZXNN6EEXAFVOWKOZ6KTVLZG3/bundle.json","state":"https://pith.science/pith/QJZXNN6EEXAFVOWKOZ6KTVLZG3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QJZXNN6EEXAFVOWKOZ6KTVLZG3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:QJZXNN6EEXAFVOWKOZ6KTVLZG3","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":"322745d6e9eb9d5c1170f91a08b349e3de6ece05e4c3c51f21ae303856807d66","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-11-22T12:55:26Z","title_canon_sha256":"18b8e4751c80a2f85d38021e2ff056cb6cb2ce6f201c3e57c84b9e22ade28b8e"},"schema_version":"1.0","source":{"id":"1211.5276","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.5276","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"arxiv_version","alias_value":"1211.5276v1","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.5276","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"pith_short_12","alias_value":"QJZXNN6EEXAF","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QJZXNN6EEXAFVOWK","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QJZXNN6E","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:0ced2af527f3e970c569c3c42256a66501dc653259a0f368df1539a5e05791d7","target":"graph","created_at":"2026-05-18T01:53:01Z","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":"The current understanding of the spin evolution of young pulsars is reviewed through a compilation of braking index measurements. An immediate conclusion is that the spin evolution of all pulsars with a measured braking index is not purely caused by a constant magnetic dipole. The case of PSR J1734-3333 and its upward movement towards the magnetars is used as a guide to try to understand why pulsars evolve with n < 3. Evolution between different pulsar families, driven by the emergence of a hidden internal magnetic field, appears as one possible picture.","authors_text":"Cristobal M. Espinoza","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-11-22T12:55:26Z","title":"The spin evolution of young pulsars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.5276","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":"sha256:1dea1fdd41448fc3f3e3773b930b3868ebfd9e8b455e18d20b86920f8a724bca","target":"record","created_at":"2026-05-18T01:53:01Z","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":"322745d6e9eb9d5c1170f91a08b349e3de6ece05e4c3c51f21ae303856807d66","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-11-22T12:55:26Z","title_canon_sha256":"18b8e4751c80a2f85d38021e2ff056cb6cb2ce6f201c3e57c84b9e22ade28b8e"},"schema_version":"1.0","source":{"id":"1211.5276","kind":"arxiv","version":1}},"canonical_sha256":"827376b7c425c05abaca767ca9d57936f26d6c0b6a1bf4d8afd08305be98ff20","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"827376b7c425c05abaca767ca9d57936f26d6c0b6a1bf4d8afd08305be98ff20","first_computed_at":"2026-05-18T01:53:01.552127Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:01.552127Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XzaG7YbXz5uJktVs1OYycGsLu/tmi0QrlKEDdG0IPHh4qF5TzRJVzK9c+Z/TH54/++Oswr6UzgU/1Y+aAr2QAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:01.552695Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.5276","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1dea1fdd41448fc3f3e3773b930b3868ebfd9e8b455e18d20b86920f8a724bca","sha256:0ced2af527f3e970c569c3c42256a66501dc653259a0f368df1539a5e05791d7"],"state_sha256":"b925657a886590134b324a2d7eb2ecefd5296202ed2fc2cf2123779955cecd66"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+RnOyUoZaYj8h0RX6PyHLv4FG2P9Evja7yFApN7oT4r5dtiEiIiSViozNCEoqG7DF0C7h1qxiXQtRt0ieB1OBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T06:18:37.048822Z","bundle_sha256":"412c8ec6bf80c8cb67e8327e08969070438ba0ba4d4c1c779c8b7b1f8311900d"}}