{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7IGCHMKF7VNBL7S4WO24K3Z2ZN","short_pith_number":"pith:7IGCHMKF","canonical_record":{"source":{"id":"1807.03588","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-10T12:16:30Z","cross_cats_sorted":[],"title_canon_sha256":"e14d2944516a89c253f70b717b58f4b77307505f9b292796886d08c959d12df8","abstract_canon_sha256":"d88b153548f28dc2d52e14188f7204af6fc8b3dbe792e89fcd628adb6413e040"},"schema_version":"1.0"},"canonical_sha256":"fa0c23b145fd5a15fe5cb3b5c56f3acb470c2092438f7167c4dfc4c52a38a94f","source":{"kind":"arxiv","id":"1807.03588","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.03588","created_at":"2026-05-18T00:09:24Z"},{"alias_kind":"arxiv_version","alias_value":"1807.03588v1","created_at":"2026-05-18T00:09:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.03588","created_at":"2026-05-18T00:09:24Z"},{"alias_kind":"pith_short_12","alias_value":"7IGCHMKF7VNB","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7IGCHMKF7VNBL7S4","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7IGCHMKF","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7IGCHMKF7VNBL7S4WO24K3Z2ZN","target":"record","payload":{"canonical_record":{"source":{"id":"1807.03588","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-10T12:16:30Z","cross_cats_sorted":[],"title_canon_sha256":"e14d2944516a89c253f70b717b58f4b77307505f9b292796886d08c959d12df8","abstract_canon_sha256":"d88b153548f28dc2d52e14188f7204af6fc8b3dbe792e89fcd628adb6413e040"},"schema_version":"1.0"},"canonical_sha256":"fa0c23b145fd5a15fe5cb3b5c56f3acb470c2092438f7167c4dfc4c52a38a94f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:24.012452Z","signature_b64":"jTMT4J+FcMKR5h4rkuAlMz7UPbD9CWPZOX7xs5OsIauuArAuaTkNfa6IYb0fcVBl428pW3TUkNZRVy9PMgnABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa0c23b145fd5a15fe5cb3b5c56f3acb470c2092438f7167c4dfc4c52a38a94f","last_reissued_at":"2026-05-18T00:09:24.011965Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:24.011965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.03588","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":"2026-05-18T00:09:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GvdrZKGBdo6i8kY6VJsEnt+Y5FhZo/X/daaGyhGJXQy+0LHQMsuDSxHvqYMP5xqO9Se6ofo2bUorpUH43xl7Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:01:14.532183Z"},"content_sha256":"77be91dd167918024c11a68e8e2eeb26de67eeaa8293b99f8653f4573ab2e65f","schema_version":"1.0","event_id":"sha256:77be91dd167918024c11a68e8e2eeb26de67eeaa8293b99f8653f4573ab2e65f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7IGCHMKF7VNBL7S4WO24K3Z2ZN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Asymmetry in Solar Torsional Oscillation and the Sunspot Cycle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Dibyendu Nandy, H M Antia, Lekshmi B","submitted_at":"2018-07-10T12:16:30Z","abstract_excerpt":"Solar torsional oscillations are migrating bands of slower- and faster-than-average rotation, which are strongly related to the Sun's magnetic cycle. We perform a long-term study (16 yr) of hemispherical asymmetry in solar torsional oscillation velocity using helioseismic data for the first time. We study the north-south asymmetry in the velocity using the zonal flow velocities obtained by ring diagram analysis of the Global Oscillation Network Group (GONG) Doppler images. We find significant hemispherical asymmetry in the torsional oscillation velocity and explore its variation with respect t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.03588","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":"2026-05-18T00:09:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lV9ELfol5qixVD3kYssHchzLsnmD9gFPkrnxthxbnj6nZe8WQb5SZh5srQc1PN08sc5c2IvcJa3NhpE4XuqOBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:01:14.532548Z"},"content_sha256":"20c01a211290d5da9c5fa40fb067067a94913f80c2a20fc43ff213b6d4d198b1","schema_version":"1.0","event_id":"sha256:20c01a211290d5da9c5fa40fb067067a94913f80c2a20fc43ff213b6d4d198b1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7IGCHMKF7VNBL7S4WO24K3Z2ZN/bundle.json","state_url":"https://pith.science/pith/7IGCHMKF7VNBL7S4WO24K3Z2ZN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7IGCHMKF7VNBL7S4WO24K3Z2ZN/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":"2026-06-03T01:01:14Z","links":{"resolver":"https://pith.science/pith/7IGCHMKF7VNBL7S4WO24K3Z2ZN","bundle":"https://pith.science/pith/7IGCHMKF7VNBL7S4WO24K3Z2ZN/bundle.json","state":"https://pith.science/pith/7IGCHMKF7VNBL7S4WO24K3Z2ZN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7IGCHMKF7VNBL7S4WO24K3Z2ZN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7IGCHMKF7VNBL7S4WO24K3Z2ZN","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":"d88b153548f28dc2d52e14188f7204af6fc8b3dbe792e89fcd628adb6413e040","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-10T12:16:30Z","title_canon_sha256":"e14d2944516a89c253f70b717b58f4b77307505f9b292796886d08c959d12df8"},"schema_version":"1.0","source":{"id":"1807.03588","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.03588","created_at":"2026-05-18T00:09:24Z"},{"alias_kind":"arxiv_version","alias_value":"1807.03588v1","created_at":"2026-05-18T00:09:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.03588","created_at":"2026-05-18T00:09:24Z"},{"alias_kind":"pith_short_12","alias_value":"7IGCHMKF7VNB","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7IGCHMKF7VNBL7S4","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7IGCHMKF","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:20c01a211290d5da9c5fa40fb067067a94913f80c2a20fc43ff213b6d4d198b1","target":"graph","created_at":"2026-05-18T00:09:24Z","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":"Solar torsional oscillations are migrating bands of slower- and faster-than-average rotation, which are strongly related to the Sun's magnetic cycle. We perform a long-term study (16 yr) of hemispherical asymmetry in solar torsional oscillation velocity using helioseismic data for the first time. We study the north-south asymmetry in the velocity using the zonal flow velocities obtained by ring diagram analysis of the Global Oscillation Network Group (GONG) Doppler images. We find significant hemispherical asymmetry in the torsional oscillation velocity and explore its variation with respect t","authors_text":"Dibyendu Nandy, H M Antia, Lekshmi B","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-10T12:16:30Z","title":"Asymmetry in Solar Torsional Oscillation and the Sunspot Cycle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.03588","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":"sha256:77be91dd167918024c11a68e8e2eeb26de67eeaa8293b99f8653f4573ab2e65f","target":"record","created_at":"2026-05-18T00:09:24Z","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":"d88b153548f28dc2d52e14188f7204af6fc8b3dbe792e89fcd628adb6413e040","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-10T12:16:30Z","title_canon_sha256":"e14d2944516a89c253f70b717b58f4b77307505f9b292796886d08c959d12df8"},"schema_version":"1.0","source":{"id":"1807.03588","kind":"arxiv","version":1}},"canonical_sha256":"fa0c23b145fd5a15fe5cb3b5c56f3acb470c2092438f7167c4dfc4c52a38a94f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa0c23b145fd5a15fe5cb3b5c56f3acb470c2092438f7167c4dfc4c52a38a94f","first_computed_at":"2026-05-18T00:09:24.011965Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:24.011965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jTMT4J+FcMKR5h4rkuAlMz7UPbD9CWPZOX7xs5OsIauuArAuaTkNfa6IYb0fcVBl428pW3TUkNZRVy9PMgnABA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:24.012452Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.03588","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77be91dd167918024c11a68e8e2eeb26de67eeaa8293b99f8653f4573ab2e65f","sha256:20c01a211290d5da9c5fa40fb067067a94913f80c2a20fc43ff213b6d4d198b1"],"state_sha256":"a73d66dbb1e63c51624271b4a8a18ae9a0037399e1d5fb9f860358643a4369eb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+jcBJFtm4T8K+KUcWq3d7xcIVax+Y9EcPwvS3F/cQAx3zV09IgfapAk+bPxPgS7Ko9DL59vRqmlERzeOR/VOCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T01:01:14.534502Z","bundle_sha256":"6e0a2230af162feabadcbe934e3d46ceca48caec2d08be71d44c36ea6406763c"}}