{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:7PR6FICARXHMEVHEJ3L27NWJK4","short_pith_number":"pith:7PR6FICA","canonical_record":{"source":{"id":"1310.4059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T14:03:43Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"69129ad05aff73d82672665d1609d64723b17ba08642173bc940c7399eff21a9","abstract_canon_sha256":"7109f2743b06d1072764cb24f4906e523736a15c90a1975ce375fe0dbbbcf131"},"schema_version":"1.0"},"canonical_sha256":"fbe3e2a0408dcec254e44ed7afb6c95712a0170eb3f2f6d2de73286832dc1073","source":{"kind":"arxiv","id":"1310.4059","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4059","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4059v1","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4059","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"7PR6FICARXHM","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7PR6FICARXHMEVHE","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7PR6FICA","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:7PR6FICARXHMEVHEJ3L27NWJK4","target":"record","payload":{"canonical_record":{"source":{"id":"1310.4059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T14:03:43Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"69129ad05aff73d82672665d1609d64723b17ba08642173bc940c7399eff21a9","abstract_canon_sha256":"7109f2743b06d1072764cb24f4906e523736a15c90a1975ce375fe0dbbbcf131"},"schema_version":"1.0"},"canonical_sha256":"fbe3e2a0408dcec254e44ed7afb6c95712a0170eb3f2f6d2de73286832dc1073","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:10:25.215796Z","signature_b64":"W4DcrdeUWNuKjqQ3SpCjwQcQbtskcPYsaXBo4/jQMgBYpXJtLKOhtZet7Ip02oPrIu4CWsT+lpENJLHBascDBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fbe3e2a0408dcec254e44ed7afb6c95712a0170eb3f2f6d2de73286832dc1073","last_reissued_at":"2026-05-18T03:10:25.215023Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:10:25.215023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.4059","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":"2026-05-18T03:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ni9HZiwkQ5tvXJ5lSVFp20jpTuP3JjBSw05Gr3Jsw0YmGhj6A55vef0SAgdveeCDyw7dkN4e2p3oLJBj96fDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:15:27.410644Z"},"content_sha256":"3fd7ae5fe267676eba046c9a2eeb3b9bdc6c677cdca9da22ed4783f281490f1a","schema_version":"1.0","event_id":"sha256:3fd7ae5fe267676eba046c9a2eeb3b9bdc6c677cdca9da22ed4783f281490f1a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:7PR6FICARXHMEVHEJ3L27NWJK4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Collective excitations in neutron-star crusts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"astro-ph.HE","authors_text":"D. Page, N. Chamel, S. Reddy","submitted_at":"2013-10-15T14:03:43Z","abstract_excerpt":"We explore the spectrum of low-energy collective excitations in the crust of a neutron star, especially in the inner region where neutron-proton clusters are immersed in a sea of superfluid neutrons. The speeds of the different modes are calculated systematically from the nuclear energy density functional theory using a Skyrme functional fitted to essentially all experimental atomic mass data."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4059","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":"2026-05-18T03:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vVIfJkTIcnzctE0xD5vW5f95E2sHsut9LZtvAxAN2outSR/76s4LJqObYw/XqMsYbT7yioOXI9IBQD9y8xxyAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T22:15:27.411371Z"},"content_sha256":"2d16c2551ba98cf8113076fbd60d4dbe98efda0ed14b8a1b28c085baef3795f5","schema_version":"1.0","event_id":"sha256:2d16c2551ba98cf8113076fbd60d4dbe98efda0ed14b8a1b28c085baef3795f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7PR6FICARXHMEVHEJ3L27NWJK4/bundle.json","state_url":"https://pith.science/pith/7PR6FICARXHMEVHEJ3L27NWJK4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7PR6FICARXHMEVHEJ3L27NWJK4/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":"2026-05-28T22:15:27Z","links":{"resolver":"https://pith.science/pith/7PR6FICARXHMEVHEJ3L27NWJK4","bundle":"https://pith.science/pith/7PR6FICARXHMEVHEJ3L27NWJK4/bundle.json","state":"https://pith.science/pith/7PR6FICARXHMEVHEJ3L27NWJK4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7PR6FICARXHMEVHEJ3L27NWJK4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7PR6FICARXHMEVHEJ3L27NWJK4","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":"7109f2743b06d1072764cb24f4906e523736a15c90a1975ce375fe0dbbbcf131","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T14:03:43Z","title_canon_sha256":"69129ad05aff73d82672665d1609d64723b17ba08642173bc940c7399eff21a9"},"schema_version":"1.0","source":{"id":"1310.4059","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4059","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4059v1","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4059","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"7PR6FICARXHM","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7PR6FICARXHMEVHE","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7PR6FICA","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:2d16c2551ba98cf8113076fbd60d4dbe98efda0ed14b8a1b28c085baef3795f5","target":"graph","created_at":"2026-05-18T03:10:25Z","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":"We explore the spectrum of low-energy collective excitations in the crust of a neutron star, especially in the inner region where neutron-proton clusters are immersed in a sea of superfluid neutrons. The speeds of the different modes are calculated systematically from the nuclear energy density functional theory using a Skyrme functional fitted to essentially all experimental atomic mass data.","authors_text":"D. Page, N. Chamel, S. Reddy","cross_cats":["nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T14:03:43Z","title":"Collective excitations in neutron-star crusts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4059","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":"sha256:3fd7ae5fe267676eba046c9a2eeb3b9bdc6c677cdca9da22ed4783f281490f1a","target":"record","created_at":"2026-05-18T03:10:25Z","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":"7109f2743b06d1072764cb24f4906e523736a15c90a1975ce375fe0dbbbcf131","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-10-15T14:03:43Z","title_canon_sha256":"69129ad05aff73d82672665d1609d64723b17ba08642173bc940c7399eff21a9"},"schema_version":"1.0","source":{"id":"1310.4059","kind":"arxiv","version":1}},"canonical_sha256":"fbe3e2a0408dcec254e44ed7afb6c95712a0170eb3f2f6d2de73286832dc1073","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbe3e2a0408dcec254e44ed7afb6c95712a0170eb3f2f6d2de73286832dc1073","first_computed_at":"2026-05-18T03:10:25.215023Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:10:25.215023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W4DcrdeUWNuKjqQ3SpCjwQcQbtskcPYsaXBo4/jQMgBYpXJtLKOhtZet7Ip02oPrIu4CWsT+lpENJLHBascDBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:10:25.215796Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.4059","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3fd7ae5fe267676eba046c9a2eeb3b9bdc6c677cdca9da22ed4783f281490f1a","sha256:2d16c2551ba98cf8113076fbd60d4dbe98efda0ed14b8a1b28c085baef3795f5"],"state_sha256":"c393c1ec8c02a57ed162ecf2eb67825dd992ce860afbc500a00fd5faa9705209"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u7LCZPZBrnDEk5P5dK1UDepa9Nkvb4sHXkryB3h4h0kRQNcKsqnQNRjHpBrijrGiLBRDsZDqUPTWC/5LK1D6Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T22:15:27.415268Z","bundle_sha256":"478815dcacb9b27f588a2d3a20495d9814eb80dd83c5da9f315882eb1099d2b4"}}