{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:NJNACFEYF6DYOLGC2PIYAGQR3J","short_pith_number":"pith:NJNACFEY","canonical_record":{"source":{"id":"1506.03933","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-12T08:27:15Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"6140b0253406efb422d497925b86e369584e6398d43b86b6a60bbeb59a8de768","abstract_canon_sha256":"8dcec62ce6ae92d70e98c21ebad068b67a0f29351a7d83284e59919553d71d2e"},"schema_version":"1.0"},"canonical_sha256":"6a5a0114982f87872cc2d3d1801a11da587fed4e830f2b5c002ecc2b7a7f675d","source":{"kind":"arxiv","id":"1506.03933","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.03933","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"arxiv_version","alias_value":"1506.03933v2","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.03933","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"pith_short_12","alias_value":"NJNACFEYF6DY","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NJNACFEYF6DYOLGC","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NJNACFEY","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:NJNACFEYF6DYOLGC2PIYAGQR3J","target":"record","payload":{"canonical_record":{"source":{"id":"1506.03933","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-12T08:27:15Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"6140b0253406efb422d497925b86e369584e6398d43b86b6a60bbeb59a8de768","abstract_canon_sha256":"8dcec62ce6ae92d70e98c21ebad068b67a0f29351a7d83284e59919553d71d2e"},"schema_version":"1.0"},"canonical_sha256":"6a5a0114982f87872cc2d3d1801a11da587fed4e830f2b5c002ecc2b7a7f675d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:10.742262Z","signature_b64":"X3RwFhtGqSnjKbYy7anECw68r3ZBcJeTohI8xLodOFVQe7dfFZ7J9V4A1h8Z6KUQs9g1i7nKcBmsFcq3mKgKDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a5a0114982f87872cc2d3d1801a11da587fed4e830f2b5c002ecc2b7a7f675d","last_reissued_at":"2026-05-18T01:37:10.741257Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:10.741257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.03933","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":"2026-05-18T01:37:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q6kcpQchJrCNY9aAIuZMeSZCpcs/opaXCUkm/xw0VXNxdrx4uJqFypBWFUqQbl+Bw/9nCKPQyD3d6zwMcm1/BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T18:52:03.006373Z"},"content_sha256":"87fbbae4c75bade9e34bd430906432df9fb2ae9376e8c70f7ab5c138630bf2c5","schema_version":"1.0","event_id":"sha256:87fbbae4c75bade9e34bd430906432df9fb2ae9376e8c70f7ab5c138630bf2c5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:NJNACFEYF6DYOLGC2PIYAGQR3J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic field growth in young glitching pulsars with a braking index","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Wynn C. G. Ho (Univ of Southampton)","submitted_at":"2015-06-12T08:27:15Z","abstract_excerpt":"In the standard scenario for spin evolution of isolated neutron stars, a young pulsar slows down with a surface magnetic field B that does not change. Thus the pulsar follows a constant B trajectory in the phase space of spin period and spin period time derivative. Such an evolution predicts a braking index n = 3 while the field is constant and n > 3 when the field decays. This contrasts with all nine observed values being n < 3. Here we consider a magnetic field that is buried soon after birth and diffuses to the surface. We use a model of a growing surface magnetic field to fit observations "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.03933","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":""},"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":"2026-05-18T01:37:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VFnWD8T4w7RSzx1YJ09lnLyAbwZnJznlX5WfdaAae6Xdwqqg4xgpEJx9n12p6qD/Abbq5UaW4o9JKGrUsjoNAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T18:52:03.006737Z"},"content_sha256":"fc4a2e6138879eb16289b8ce6208a1420343c71d50d9e5da9b0abf449acf0577","schema_version":"1.0","event_id":"sha256:fc4a2e6138879eb16289b8ce6208a1420343c71d50d9e5da9b0abf449acf0577"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NJNACFEYF6DYOLGC2PIYAGQR3J/bundle.json","state_url":"https://pith.science/pith/NJNACFEYF6DYOLGC2PIYAGQR3J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NJNACFEYF6DYOLGC2PIYAGQR3J/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":"2026-05-21T18:52:03Z","links":{"resolver":"https://pith.science/pith/NJNACFEYF6DYOLGC2PIYAGQR3J","bundle":"https://pith.science/pith/NJNACFEYF6DYOLGC2PIYAGQR3J/bundle.json","state":"https://pith.science/pith/NJNACFEYF6DYOLGC2PIYAGQR3J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NJNACFEYF6DYOLGC2PIYAGQR3J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:NJNACFEYF6DYOLGC2PIYAGQR3J","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":"8dcec62ce6ae92d70e98c21ebad068b67a0f29351a7d83284e59919553d71d2e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-12T08:27:15Z","title_canon_sha256":"6140b0253406efb422d497925b86e369584e6398d43b86b6a60bbeb59a8de768"},"schema_version":"1.0","source":{"id":"1506.03933","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.03933","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"arxiv_version","alias_value":"1506.03933v2","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.03933","created_at":"2026-05-18T01:37:10Z"},{"alias_kind":"pith_short_12","alias_value":"NJNACFEYF6DY","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NJNACFEYF6DYOLGC","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NJNACFEY","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:fc4a2e6138879eb16289b8ce6208a1420343c71d50d9e5da9b0abf449acf0577","target":"graph","created_at":"2026-05-18T01:37:10Z","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":"In the standard scenario for spin evolution of isolated neutron stars, a young pulsar slows down with a surface magnetic field B that does not change. Thus the pulsar follows a constant B trajectory in the phase space of spin period and spin period time derivative. Such an evolution predicts a braking index n = 3 while the field is constant and n > 3 when the field decays. This contrasts with all nine observed values being n < 3. Here we consider a magnetic field that is buried soon after birth and diffuses to the surface. We use a model of a growing surface magnetic field to fit observations ","authors_text":"Wynn C. G. Ho (Univ of Southampton)","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-12T08:27:15Z","title":"Magnetic field growth in young glitching pulsars with a braking index"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.03933","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":"sha256:87fbbae4c75bade9e34bd430906432df9fb2ae9376e8c70f7ab5c138630bf2c5","target":"record","created_at":"2026-05-18T01:37:10Z","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":"8dcec62ce6ae92d70e98c21ebad068b67a0f29351a7d83284e59919553d71d2e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-06-12T08:27:15Z","title_canon_sha256":"6140b0253406efb422d497925b86e369584e6398d43b86b6a60bbeb59a8de768"},"schema_version":"1.0","source":{"id":"1506.03933","kind":"arxiv","version":2}},"canonical_sha256":"6a5a0114982f87872cc2d3d1801a11da587fed4e830f2b5c002ecc2b7a7f675d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a5a0114982f87872cc2d3d1801a11da587fed4e830f2b5c002ecc2b7a7f675d","first_computed_at":"2026-05-18T01:37:10.741257Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:10.741257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X3RwFhtGqSnjKbYy7anECw68r3ZBcJeTohI8xLodOFVQe7dfFZ7J9V4A1h8Z6KUQs9g1i7nKcBmsFcq3mKgKDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:10.742262Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.03933","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87fbbae4c75bade9e34bd430906432df9fb2ae9376e8c70f7ab5c138630bf2c5","sha256:fc4a2e6138879eb16289b8ce6208a1420343c71d50d9e5da9b0abf449acf0577"],"state_sha256":"ae7813c878175f123c156e5a19e377f9b985a939bc53e3e081d14a01e0a3307b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xp1KXBAiab/WtmRu39MHsO+zDbp+er4cvUaM3nxgreDerY5z2PLMtBRe66ZCwrytlH+7boOZuuMj5lqCdDEmBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T18:52:03.009023Z","bundle_sha256":"3f434e2b7467246bf0e797f4ea2366b7223f54b55c0a053ba45bd212a1fead38"}}