{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:NNZAKICNEDJVYRDA6KJGRRUO27","short_pith_number":"pith:NNZAKICN","canonical_record":{"source":{"id":"1504.00223","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-01T13:21:31Z","cross_cats_sorted":[],"title_canon_sha256":"0c333e8ee68ba92cde20b5d13fd5572ef8e90192f39dfe463fe29ae03240d057","abstract_canon_sha256":"09bca64243f751da5e47d04690264f22b1a5296fd71e8ec48a75979865fca224"},"schema_version":"1.0"},"canonical_sha256":"6b7205204d20d35c4460f29268c68ed7dd9710505e4e18a2e88c083ab73b6263","source":{"kind":"arxiv","id":"1504.00223","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00223","created_at":"2026-05-18T01:33:43Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00223v2","created_at":"2026-05-18T01:33:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00223","created_at":"2026-05-18T01:33:43Z"},{"alias_kind":"pith_short_12","alias_value":"NNZAKICNEDJV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NNZAKICNEDJVYRDA","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NNZAKICN","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:NNZAKICNEDJVYRDA6KJGRRUO27","target":"record","payload":{"canonical_record":{"source":{"id":"1504.00223","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-01T13:21:31Z","cross_cats_sorted":[],"title_canon_sha256":"0c333e8ee68ba92cde20b5d13fd5572ef8e90192f39dfe463fe29ae03240d057","abstract_canon_sha256":"09bca64243f751da5e47d04690264f22b1a5296fd71e8ec48a75979865fca224"},"schema_version":"1.0"},"canonical_sha256":"6b7205204d20d35c4460f29268c68ed7dd9710505e4e18a2e88c083ab73b6263","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:43.637456Z","signature_b64":"lRcVlB9PqqQ5w81za4hrtg+trZUvdXdJLx0vUp2+iIPz1uA4hKiEJNpOInSQ3GX6RpXQD3huTRuMQFHeb9bQDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6b7205204d20d35c4460f29268c68ed7dd9710505e4e18a2e88c083ab73b6263","last_reissued_at":"2026-05-18T01:33:43.636870Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:43.636870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.00223","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":"2026-05-18T01:33:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o7OKXnk7kGIlgK8qcn0GObFwGNKPpYaAtS6yCRyHxaSvv/1k0oQMJQRWeZCtmDN5pnCAvqjd4KStswiyA0yaDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:39:00.118217Z"},"content_sha256":"994a9bbd5cbd2114354f9f3af41b7e03cd4d01062f943c279183d4ab1c94ccaa","schema_version":"1.0","event_id":"sha256:994a9bbd5cbd2114354f9f3af41b7e03cd4d01062f943c279183d4ab1c94ccaa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:NNZAKICNEDJVYRDA6KJGRRUO27","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spatially resolved vertical vorticity in solar supergranulation using helioseismology and local correlation tracking","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. C. Birch, J. Langfellner, L. Gizon","submitted_at":"2015-04-01T13:21:31Z","abstract_excerpt":"Flow vorticity is a fundamental property of turbulent convection in rotating systems. Solar supergranules exhibit a preferred sense of rotation, which depends on the hemisphere. This is due to the Coriolis force acting on the diverging horizontal flows. We aim to spatially resolve the vertical flow vorticity of the average supergranule at different latitudes, both for outflow and inflow regions. To measure the vertical vorticity, we use two independent techniques: time-distance helioseismology (TD) and local correlation tracking of granules in intensity images (LCT) using data from the Heliose"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00223","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":"2026-05-18T01:33:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tW73ktGPC+VTeIKcEzEx1GbcTI+G64TnxDAt/GRICykgPK/cuZqQgfe46IswRi8t+/ECJfeMWNv01kuD5cE6BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:39:00.118805Z"},"content_sha256":"66d80290de5a31733fb5dfb06ce2daa993f0553eef1e3b349b7fef24cc18065e","schema_version":"1.0","event_id":"sha256:66d80290de5a31733fb5dfb06ce2daa993f0553eef1e3b349b7fef24cc18065e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NNZAKICNEDJVYRDA6KJGRRUO27/bundle.json","state_url":"https://pith.science/pith/NNZAKICNEDJVYRDA6KJGRRUO27/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NNZAKICNEDJVYRDA6KJGRRUO27/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":"2026-06-02T02:39:00Z","links":{"resolver":"https://pith.science/pith/NNZAKICNEDJVYRDA6KJGRRUO27","bundle":"https://pith.science/pith/NNZAKICNEDJVYRDA6KJGRRUO27/bundle.json","state":"https://pith.science/pith/NNZAKICNEDJVYRDA6KJGRRUO27/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NNZAKICNEDJVYRDA6KJGRRUO27/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:NNZAKICNEDJVYRDA6KJGRRUO27","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":"09bca64243f751da5e47d04690264f22b1a5296fd71e8ec48a75979865fca224","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-01T13:21:31Z","title_canon_sha256":"0c333e8ee68ba92cde20b5d13fd5572ef8e90192f39dfe463fe29ae03240d057"},"schema_version":"1.0","source":{"id":"1504.00223","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00223","created_at":"2026-05-18T01:33:43Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00223v2","created_at":"2026-05-18T01:33:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00223","created_at":"2026-05-18T01:33:43Z"},{"alias_kind":"pith_short_12","alias_value":"NNZAKICNEDJV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NNZAKICNEDJVYRDA","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NNZAKICN","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:66d80290de5a31733fb5dfb06ce2daa993f0553eef1e3b349b7fef24cc18065e","target":"graph","created_at":"2026-05-18T01:33:43Z","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":"Flow vorticity is a fundamental property of turbulent convection in rotating systems. Solar supergranules exhibit a preferred sense of rotation, which depends on the hemisphere. This is due to the Coriolis force acting on the diverging horizontal flows. We aim to spatially resolve the vertical flow vorticity of the average supergranule at different latitudes, both for outflow and inflow regions. To measure the vertical vorticity, we use two independent techniques: time-distance helioseismology (TD) and local correlation tracking of granules in intensity images (LCT) using data from the Heliose","authors_text":"A. C. Birch, J. Langfellner, L. Gizon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-01T13:21:31Z","title":"Spatially resolved vertical vorticity in solar supergranulation using helioseismology and local correlation tracking"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00223","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":"sha256:994a9bbd5cbd2114354f9f3af41b7e03cd4d01062f943c279183d4ab1c94ccaa","target":"record","created_at":"2026-05-18T01:33:43Z","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":"09bca64243f751da5e47d04690264f22b1a5296fd71e8ec48a75979865fca224","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-01T13:21:31Z","title_canon_sha256":"0c333e8ee68ba92cde20b5d13fd5572ef8e90192f39dfe463fe29ae03240d057"},"schema_version":"1.0","source":{"id":"1504.00223","kind":"arxiv","version":2}},"canonical_sha256":"6b7205204d20d35c4460f29268c68ed7dd9710505e4e18a2e88c083ab73b6263","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6b7205204d20d35c4460f29268c68ed7dd9710505e4e18a2e88c083ab73b6263","first_computed_at":"2026-05-18T01:33:43.636870Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:33:43.636870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lRcVlB9PqqQ5w81za4hrtg+trZUvdXdJLx0vUp2+iIPz1uA4hKiEJNpOInSQ3GX6RpXQD3huTRuMQFHeb9bQDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:33:43.637456Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.00223","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:994a9bbd5cbd2114354f9f3af41b7e03cd4d01062f943c279183d4ab1c94ccaa","sha256:66d80290de5a31733fb5dfb06ce2daa993f0553eef1e3b349b7fef24cc18065e"],"state_sha256":"2878e6bf5c38dba0f80cfc6f350e6caf3c529eb31ef5e863a9aed8a0f09b833b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Kde6ksPDFaCFN30j6Ve8NVdqzfMtSvbdzqRwhKiJ08RWuCgi4GTktIzQ1H6fENKoQMgc7o7hNG9sKFhZD4rCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T02:39:00.121654Z","bundle_sha256":"2d167a09f8acdf682cd22daeca69d660998740b72292b6a1edad885d01002616"}}