{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:LKPN6A7ZWKVBAQZSXAH36GYGH6","short_pith_number":"pith:LKPN6A7Z","canonical_record":{"source":{"id":"1209.4877","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-21T18:10:27Z","cross_cats_sorted":[],"title_canon_sha256":"3cb1f292c4c57646c6a22f74813af50f2c81cfb33a0485e24461e7b53d0b59ca","abstract_canon_sha256":"23e830d2fe2b9e0a6881943de699dfb2fdfed7efa144aed00e0b394f0203596b"},"schema_version":"1.0"},"canonical_sha256":"5a9edf03f9b2aa104332b80fbf1b063fbb52484cf5c208c65a9b5d399ee020c1","source":{"kind":"arxiv","id":"1209.4877","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.4877","created_at":"2026-05-18T03:45:01Z"},{"alias_kind":"arxiv_version","alias_value":"1209.4877v1","created_at":"2026-05-18T03:45:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.4877","created_at":"2026-05-18T03:45:01Z"},{"alias_kind":"pith_short_12","alias_value":"LKPN6A7ZWKVB","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"LKPN6A7ZWKVBAQZS","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"LKPN6A7Z","created_at":"2026-05-18T12:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:LKPN6A7ZWKVBAQZSXAH36GYGH6","target":"record","payload":{"canonical_record":{"source":{"id":"1209.4877","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-21T18:10:27Z","cross_cats_sorted":[],"title_canon_sha256":"3cb1f292c4c57646c6a22f74813af50f2c81cfb33a0485e24461e7b53d0b59ca","abstract_canon_sha256":"23e830d2fe2b9e0a6881943de699dfb2fdfed7efa144aed00e0b394f0203596b"},"schema_version":"1.0"},"canonical_sha256":"5a9edf03f9b2aa104332b80fbf1b063fbb52484cf5c208c65a9b5d399ee020c1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:45:01.568640Z","signature_b64":"qNm6I4Nho/evhUjfXzg7rLNaniLoCG5OLzLbrts5LlBOAAyuU6qZKCcWYs9QqbiS7txigVD9YmGpt+8jn7lECA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a9edf03f9b2aa104332b80fbf1b063fbb52484cf5c208c65a9b5d399ee020c1","last_reissued_at":"2026-05-18T03:45:01.567712Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:45:01.567712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.4877","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":"2026-05-18T03:45:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ln7kdT8W/ajExkExN69PbJfUH3VjCWI1N+JfUA27MYnHFwVl6Ijgcbpx79MaF6qmdMeJIs8osT/S19Gk8HMZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:09:20.082012Z"},"content_sha256":"a516ca443892dfd47c088f145f7f553e0344f880a7153e8a5c4c23456ece5080","schema_version":"1.0","event_id":"sha256:a516ca443892dfd47c088f145f7f553e0344f880a7153e8a5c4c23456ece5080"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:LKPN6A7ZWKVBAQZSXAH36GYGH6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Verification of the Travel Time Measurement Technique and the Helioseismic Inversion Procedure for Sound Speed Using Artificial Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alexander G. Kosovichev, Junwei Zhao, Konstantin V. Parchevsky, Thomas Hartlep","submitted_at":"2012-09-21T18:10:27Z","abstract_excerpt":"We performed 3D numerical simulations of the solar surface wave field for the quiet Sun and for three models with different localized sound-speed variations in the interior with: (i) deep, (ii) shallow, and (iii) two-layer structures. We used simulated data generated by two different codes which use the same standard solar model as a background model, but utilize two different integration techniques and use different models of stochastic wave excitation. Acoustic travel times were measured from all data sets using the time-distance helioseismology technique and compared with the ray theory pre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.4877","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":"2026-05-18T03:45:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J5AkhcOj6Tm/FpteK2/kf/iz/eBUGCJP1IehdX+AQoeSc/m3EoouzsLwFDMrCo/mXYf4+Q1MjFTZ0o2LFbKEAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T17:09:20.082692Z"},"content_sha256":"f0878e5883045b7dc7640b4f1a92196da615070551aba3e613ddbaa553069580","schema_version":"1.0","event_id":"sha256:f0878e5883045b7dc7640b4f1a92196da615070551aba3e613ddbaa553069580"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LKPN6A7ZWKVBAQZSXAH36GYGH6/bundle.json","state_url":"https://pith.science/pith/LKPN6A7ZWKVBAQZSXAH36GYGH6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LKPN6A7ZWKVBAQZSXAH36GYGH6/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":"2026-05-29T17:09:20Z","links":{"resolver":"https://pith.science/pith/LKPN6A7ZWKVBAQZSXAH36GYGH6","bundle":"https://pith.science/pith/LKPN6A7ZWKVBAQZSXAH36GYGH6/bundle.json","state":"https://pith.science/pith/LKPN6A7ZWKVBAQZSXAH36GYGH6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LKPN6A7ZWKVBAQZSXAH36GYGH6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:LKPN6A7ZWKVBAQZSXAH36GYGH6","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":"23e830d2fe2b9e0a6881943de699dfb2fdfed7efa144aed00e0b394f0203596b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-21T18:10:27Z","title_canon_sha256":"3cb1f292c4c57646c6a22f74813af50f2c81cfb33a0485e24461e7b53d0b59ca"},"schema_version":"1.0","source":{"id":"1209.4877","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.4877","created_at":"2026-05-18T03:45:01Z"},{"alias_kind":"arxiv_version","alias_value":"1209.4877v1","created_at":"2026-05-18T03:45:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.4877","created_at":"2026-05-18T03:45:01Z"},{"alias_kind":"pith_short_12","alias_value":"LKPN6A7ZWKVB","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"LKPN6A7ZWKVBAQZS","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"LKPN6A7Z","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:f0878e5883045b7dc7640b4f1a92196da615070551aba3e613ddbaa553069580","target":"graph","created_at":"2026-05-18T03:45:01Z","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":"We performed 3D numerical simulations of the solar surface wave field for the quiet Sun and for three models with different localized sound-speed variations in the interior with: (i) deep, (ii) shallow, and (iii) two-layer structures. We used simulated data generated by two different codes which use the same standard solar model as a background model, but utilize two different integration techniques and use different models of stochastic wave excitation. Acoustic travel times were measured from all data sets using the time-distance helioseismology technique and compared with the ray theory pre","authors_text":"Alexander G. Kosovichev, Junwei Zhao, Konstantin V. Parchevsky, Thomas Hartlep","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-21T18:10:27Z","title":"Verification of the Travel Time Measurement Technique and the Helioseismic Inversion Procedure for Sound Speed Using Artificial Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.4877","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:a516ca443892dfd47c088f145f7f553e0344f880a7153e8a5c4c23456ece5080","target":"record","created_at":"2026-05-18T03:45:01Z","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":"23e830d2fe2b9e0a6881943de699dfb2fdfed7efa144aed00e0b394f0203596b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-21T18:10:27Z","title_canon_sha256":"3cb1f292c4c57646c6a22f74813af50f2c81cfb33a0485e24461e7b53d0b59ca"},"schema_version":"1.0","source":{"id":"1209.4877","kind":"arxiv","version":1}},"canonical_sha256":"5a9edf03f9b2aa104332b80fbf1b063fbb52484cf5c208c65a9b5d399ee020c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a9edf03f9b2aa104332b80fbf1b063fbb52484cf5c208c65a9b5d399ee020c1","first_computed_at":"2026-05-18T03:45:01.567712Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:45:01.567712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qNm6I4Nho/evhUjfXzg7rLNaniLoCG5OLzLbrts5LlBOAAyuU6qZKCcWYs9QqbiS7txigVD9YmGpt+8jn7lECA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:45:01.568640Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.4877","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a516ca443892dfd47c088f145f7f553e0344f880a7153e8a5c4c23456ece5080","sha256:f0878e5883045b7dc7640b4f1a92196da615070551aba3e613ddbaa553069580"],"state_sha256":"5246cc33aa00c838c6089a6bec85c7383e3354f166724ca2ac760b94a2aba40a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YZEjN69IEw+zgcnkbErjV7Y/ceNRWbbIc3C8vc3rf/D34KtY0eUfAO9sOAAKtwAAVAr7mYT76Sf3EYcNv+UxCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T17:09:20.086438Z","bundle_sha256":"57475537efa8811ce6793ef11c062d9172ff9ac41bb44768467e3559df039852"}}