{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:CVNODYSLQC4AIC25WPXLO2P4CC","short_pith_number":"pith:CVNODYSL","canonical_record":{"source":{"id":"1807.01150","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-07-03T13:20:49Z","cross_cats_sorted":[],"title_canon_sha256":"cfd55205b9fe1a151d4fa4695d4b24cff093153a9ff1a8b095c8fec11e7dd32d","abstract_canon_sha256":"cf21ea0555b54a3eb0e18bf53577b08a15b753016113ce26ee6a2f9a7c789e7a"},"schema_version":"1.0"},"canonical_sha256":"155ae1e24b80b8040b5db3eeb769fc10afdb0e96116948261732c9b655d55f99","source":{"kind":"arxiv","id":"1807.01150","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.01150","created_at":"2026-05-18T00:08:35Z"},{"alias_kind":"arxiv_version","alias_value":"1807.01150v1","created_at":"2026-05-18T00:08:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01150","created_at":"2026-05-18T00:08:35Z"},{"alias_kind":"pith_short_12","alias_value":"CVNODYSLQC4A","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"CVNODYSLQC4AIC25","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"CVNODYSL","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:CVNODYSLQC4AIC25WPXLO2P4CC","target":"record","payload":{"canonical_record":{"source":{"id":"1807.01150","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-07-03T13:20:49Z","cross_cats_sorted":[],"title_canon_sha256":"cfd55205b9fe1a151d4fa4695d4b24cff093153a9ff1a8b095c8fec11e7dd32d","abstract_canon_sha256":"cf21ea0555b54a3eb0e18bf53577b08a15b753016113ce26ee6a2f9a7c789e7a"},"schema_version":"1.0"},"canonical_sha256":"155ae1e24b80b8040b5db3eeb769fc10afdb0e96116948261732c9b655d55f99","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:08:35.530952Z","signature_b64":"VCDBtDKeXFI+chhyDAweLuA8rwyXSWihUPBJjE8526+usKJ36KCc3+wutlVd1ZMocf/nsxZZsSt52O/vT1K+CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"155ae1e24b80b8040b5db3eeb769fc10afdb0e96116948261732c9b655d55f99","last_reissued_at":"2026-05-18T00:08:35.530306Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:08:35.530306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.01150","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":"2026-05-18T00:08:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dPMJBYTPnXp3jOArpozwCDHsv3vIg85nMu2TtIOxvgVJefVDHTOJ+crNtjKPDuO53bv0uVerIStfMx87G/2lBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T07:48:47.996882Z"},"content_sha256":"17673f2c9034911aa443056bf8cf53680e81bff482e35b5c0663f49870c0ff8c","schema_version":"1.0","event_id":"sha256:17673f2c9034911aa443056bf8cf53680e81bff482e35b5c0663f49870c0ff8c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:CVNODYSLQC4AIC25WPXLO2P4CC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nuclear Physics of the Outer Layers of Accreting Neutron Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alex Deibel, Justin Elfritz, Laurens Keek, Peter Shternin, Zach Meisel","submitted_at":"2018-07-03T13:20:49Z","abstract_excerpt":"Now 50 years since the existence of the neutron star crust was proposed, we review the current understanding of the nuclear physics of the outer layers of accreting neutron stars. Nuclei produced during nuclear burning replace the nascent composition of the neutron star ocean and crust. Non-equilibrium nuclear reactions driven by compression alter the outer thermal structure and chemical composition, leaving observable imprints on astronomical phenomena. As observations of bursting neutron stars and cooling neutron stars have increased, the recent volume of astronomical data allows new insight"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01150","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":"2026-05-18T00:08:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"07tvNm8GfaxtokT8gkUm1m3uVS7TNtgjzo/Lg+XnMAvTN63XTExQ0BtGhQqBNsi3dFbqBhhlylPLeGmWbqtoBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T07:48:47.997221Z"},"content_sha256":"dff3dd6d52e2c5f7ab92dd72c6d99e3f86d09f513247e54b4bc63641f97a01bc","schema_version":"1.0","event_id":"sha256:dff3dd6d52e2c5f7ab92dd72c6d99e3f86d09f513247e54b4bc63641f97a01bc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CVNODYSLQC4AIC25WPXLO2P4CC/bundle.json","state_url":"https://pith.science/pith/CVNODYSLQC4AIC25WPXLO2P4CC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CVNODYSLQC4AIC25WPXLO2P4CC/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":"2026-06-02T07:48:47Z","links":{"resolver":"https://pith.science/pith/CVNODYSLQC4AIC25WPXLO2P4CC","bundle":"https://pith.science/pith/CVNODYSLQC4AIC25WPXLO2P4CC/bundle.json","state":"https://pith.science/pith/CVNODYSLQC4AIC25WPXLO2P4CC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CVNODYSLQC4AIC25WPXLO2P4CC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CVNODYSLQC4AIC25WPXLO2P4CC","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":"cf21ea0555b54a3eb0e18bf53577b08a15b753016113ce26ee6a2f9a7c789e7a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-07-03T13:20:49Z","title_canon_sha256":"cfd55205b9fe1a151d4fa4695d4b24cff093153a9ff1a8b095c8fec11e7dd32d"},"schema_version":"1.0","source":{"id":"1807.01150","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.01150","created_at":"2026-05-18T00:08:35Z"},{"alias_kind":"arxiv_version","alias_value":"1807.01150v1","created_at":"2026-05-18T00:08:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01150","created_at":"2026-05-18T00:08:35Z"},{"alias_kind":"pith_short_12","alias_value":"CVNODYSLQC4A","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"CVNODYSLQC4AIC25","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"CVNODYSL","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:dff3dd6d52e2c5f7ab92dd72c6d99e3f86d09f513247e54b4bc63641f97a01bc","target":"graph","created_at":"2026-05-18T00:08:35Z","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":"Now 50 years since the existence of the neutron star crust was proposed, we review the current understanding of the nuclear physics of the outer layers of accreting neutron stars. Nuclei produced during nuclear burning replace the nascent composition of the neutron star ocean and crust. Non-equilibrium nuclear reactions driven by compression alter the outer thermal structure and chemical composition, leaving observable imprints on astronomical phenomena. As observations of bursting neutron stars and cooling neutron stars have increased, the recent volume of astronomical data allows new insight","authors_text":"Alex Deibel, Justin Elfritz, Laurens Keek, Peter Shternin, Zach Meisel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-07-03T13:20:49Z","title":"Nuclear Physics of the Outer Layers of Accreting Neutron Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01150","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":"sha256:17673f2c9034911aa443056bf8cf53680e81bff482e35b5c0663f49870c0ff8c","target":"record","created_at":"2026-05-18T00:08:35Z","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":"cf21ea0555b54a3eb0e18bf53577b08a15b753016113ce26ee6a2f9a7c789e7a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-07-03T13:20:49Z","title_canon_sha256":"cfd55205b9fe1a151d4fa4695d4b24cff093153a9ff1a8b095c8fec11e7dd32d"},"schema_version":"1.0","source":{"id":"1807.01150","kind":"arxiv","version":1}},"canonical_sha256":"155ae1e24b80b8040b5db3eeb769fc10afdb0e96116948261732c9b655d55f99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"155ae1e24b80b8040b5db3eeb769fc10afdb0e96116948261732c9b655d55f99","first_computed_at":"2026-05-18T00:08:35.530306Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:08:35.530306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VCDBtDKeXFI+chhyDAweLuA8rwyXSWihUPBJjE8526+usKJ36KCc3+wutlVd1ZMocf/nsxZZsSt52O/vT1K+CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:08:35.530952Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.01150","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17673f2c9034911aa443056bf8cf53680e81bff482e35b5c0663f49870c0ff8c","sha256:dff3dd6d52e2c5f7ab92dd72c6d99e3f86d09f513247e54b4bc63641f97a01bc"],"state_sha256":"568da56cb1e95792897d601bf87888f448a3229c5a228b7511f8757249a15444"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AgUgbLkwxsiCX1VNDsGeEEg+CyqbCOsN4Un0NIii+W1ChHWi3sSv3LkWp4TftJHWiJCMq2mbsl40uAKTQ8AbCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T07:48:47.999072Z","bundle_sha256":"9ce3d684ed13f0b589da58e74f77871271c10ed66f5896821c9322fe1a2b243e"}}