{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:4VXV47GULEV63ZKRQOJPFRMP4K","short_pith_number":"pith:4VXV47GU","canonical_record":{"source":{"id":"1611.01666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-05T16:24:24Z","cross_cats_sorted":[],"title_canon_sha256":"991a5a064c76d24968dd279e5ea6847b56e12de5ddfd2509bb52a38cc589c80d","abstract_canon_sha256":"9da421000dc01ea3c10931087cdd18e17fd044404fa1adb0be9b7b79bb6ff1c6"},"schema_version":"1.0"},"canonical_sha256":"e56f5e7cd4592bede5518392f2c58fe29597509e40661392547ccf664e9e61fe","source":{"kind":"arxiv","id":"1611.01666","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.01666","created_at":"2026-05-18T00:47:49Z"},{"alias_kind":"arxiv_version","alias_value":"1611.01666v1","created_at":"2026-05-18T00:47:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.01666","created_at":"2026-05-18T00:47:49Z"},{"alias_kind":"pith_short_12","alias_value":"4VXV47GULEV6","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"4VXV47GULEV63ZKR","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"4VXV47GU","created_at":"2026-05-18T12:29:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:4VXV47GULEV63ZKRQOJPFRMP4K","target":"record","payload":{"canonical_record":{"source":{"id":"1611.01666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-05T16:24:24Z","cross_cats_sorted":[],"title_canon_sha256":"991a5a064c76d24968dd279e5ea6847b56e12de5ddfd2509bb52a38cc589c80d","abstract_canon_sha256":"9da421000dc01ea3c10931087cdd18e17fd044404fa1adb0be9b7b79bb6ff1c6"},"schema_version":"1.0"},"canonical_sha256":"e56f5e7cd4592bede5518392f2c58fe29597509e40661392547ccf664e9e61fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:49.482543Z","signature_b64":"j0t+xedKyJiBsMRGAGFUmnN37YL+0ctGJ9JSKk90jLgNS8lm8ssy4blgi8eDln8ljSPeyuFgq2wAMXMAIOQABw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e56f5e7cd4592bede5518392f2c58fe29597509e40661392547ccf664e9e61fe","last_reissued_at":"2026-05-18T00:47:49.481938Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:49.481938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.01666","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":"2026-05-18T00:47:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6mni/NH0Og5xGEWze+aN/SaZZYVwH53lLBoVg2UGCa7Uz5/GvNu8EUF/dN++k85HpN3tuzCuDgojmd86x31oBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:35:48.684191Z"},"content_sha256":"a9d427250b888f20a776a1dc0369b9f3d12a47cdd965223f278e3430490d678b","schema_version":"1.0","event_id":"sha256:a9d427250b888f20a776a1dc0369b9f3d12a47cdd965223f278e3430490d678b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:4VXV47GULEV63ZKRQOJPFRMP4K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Computational helioseismology in the frequency domain: acoustic waves in axisymmetric solar models with flows","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Aaron C. Birch, Chris S. Hanson, Damien Fournier, Emanuele Papini, H\\'el\\`ene Barucq, Juliette Chabassier, Laurent Gizon, Marc Durufl\\'e, Michael Legu\\`ebe, Thorsten Hohage","submitted_at":"2016-11-05T16:24:24Z","abstract_excerpt":"Local helioseismology has so far relied on semi-analytical methods to compute the spatial sensitivity of wave travel times to perturbations in the solar interior. These methods are cumbersome and lack flexibility. Here we propose a convenient framework for numerically solving the forward problem of time-distance helioseismology in the frequency domain. The fundamental quantity to be computed is the cross-covariance of the seismic wavefield. We choose sources of wave excitation that enable us to relate the cross-covariance of the oscillations to the Green's function in a straightforward manner."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.01666","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":"2026-05-18T00:47:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"evHpkdaaNVG6LQo8zSayYXKXwLpuA+ASZstAuH1x0RlxeKpZpEcnTpVdXSvz0u0duqxHABmYAmhfjuHmZJqwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:35:48.685056Z"},"content_sha256":"141f4f710be987eea5349eb570c8eadd2db5aebf1d77c105eba55ce6b1bb8a72","schema_version":"1.0","event_id":"sha256:141f4f710be987eea5349eb570c8eadd2db5aebf1d77c105eba55ce6b1bb8a72"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4VXV47GULEV63ZKRQOJPFRMP4K/bundle.json","state_url":"https://pith.science/pith/4VXV47GULEV63ZKRQOJPFRMP4K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4VXV47GULEV63ZKRQOJPFRMP4K/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":"2026-05-31T11:35:48Z","links":{"resolver":"https://pith.science/pith/4VXV47GULEV63ZKRQOJPFRMP4K","bundle":"https://pith.science/pith/4VXV47GULEV63ZKRQOJPFRMP4K/bundle.json","state":"https://pith.science/pith/4VXV47GULEV63ZKRQOJPFRMP4K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4VXV47GULEV63ZKRQOJPFRMP4K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:4VXV47GULEV63ZKRQOJPFRMP4K","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":"9da421000dc01ea3c10931087cdd18e17fd044404fa1adb0be9b7b79bb6ff1c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-05T16:24:24Z","title_canon_sha256":"991a5a064c76d24968dd279e5ea6847b56e12de5ddfd2509bb52a38cc589c80d"},"schema_version":"1.0","source":{"id":"1611.01666","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.01666","created_at":"2026-05-18T00:47:49Z"},{"alias_kind":"arxiv_version","alias_value":"1611.01666v1","created_at":"2026-05-18T00:47:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.01666","created_at":"2026-05-18T00:47:49Z"},{"alias_kind":"pith_short_12","alias_value":"4VXV47GULEV6","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"4VXV47GULEV63ZKR","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"4VXV47GU","created_at":"2026-05-18T12:29:58Z"}],"graph_snapshots":[{"event_id":"sha256:141f4f710be987eea5349eb570c8eadd2db5aebf1d77c105eba55ce6b1bb8a72","target":"graph","created_at":"2026-05-18T00:47:49Z","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":"Local helioseismology has so far relied on semi-analytical methods to compute the spatial sensitivity of wave travel times to perturbations in the solar interior. These methods are cumbersome and lack flexibility. Here we propose a convenient framework for numerically solving the forward problem of time-distance helioseismology in the frequency domain. The fundamental quantity to be computed is the cross-covariance of the seismic wavefield. We choose sources of wave excitation that enable us to relate the cross-covariance of the oscillations to the Green's function in a straightforward manner.","authors_text":"Aaron C. Birch, Chris S. Hanson, Damien Fournier, Emanuele Papini, H\\'el\\`ene Barucq, Juliette Chabassier, Laurent Gizon, Marc Durufl\\'e, Michael Legu\\`ebe, Thorsten Hohage","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-05T16:24:24Z","title":"Computational helioseismology in the frequency domain: acoustic waves in axisymmetric solar models with flows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.01666","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:a9d427250b888f20a776a1dc0369b9f3d12a47cdd965223f278e3430490d678b","target":"record","created_at":"2026-05-18T00:47:49Z","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":"9da421000dc01ea3c10931087cdd18e17fd044404fa1adb0be9b7b79bb6ff1c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-05T16:24:24Z","title_canon_sha256":"991a5a064c76d24968dd279e5ea6847b56e12de5ddfd2509bb52a38cc589c80d"},"schema_version":"1.0","source":{"id":"1611.01666","kind":"arxiv","version":1}},"canonical_sha256":"e56f5e7cd4592bede5518392f2c58fe29597509e40661392547ccf664e9e61fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e56f5e7cd4592bede5518392f2c58fe29597509e40661392547ccf664e9e61fe","first_computed_at":"2026-05-18T00:47:49.481938Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:49.481938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j0t+xedKyJiBsMRGAGFUmnN37YL+0ctGJ9JSKk90jLgNS8lm8ssy4blgi8eDln8ljSPeyuFgq2wAMXMAIOQABw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:49.482543Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.01666","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9d427250b888f20a776a1dc0369b9f3d12a47cdd965223f278e3430490d678b","sha256:141f4f710be987eea5349eb570c8eadd2db5aebf1d77c105eba55ce6b1bb8a72"],"state_sha256":"1f742649d90622c340aa4f64d8d7d355eac0dccde6560319b04156cd04b4247e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h1BIg37ggQ1hqpZy0ga3nCaQQYRKj4bRAiZhCo21IBl+9yMq9F3imrqPrOR+k/vL5v6Ex2ulBo1Fj2BsXYfUDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T11:35:48.689368Z","bundle_sha256":"144eb1f8ca155b7a68e50ab7fbd97f4305768e6c9689190ded886f7fdbaba558"}}