{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6WILPS4IZBBUZ6YXU75KFOWKKG","short_pith_number":"pith:6WILPS4I","canonical_record":{"source":{"id":"1903.11839","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-28T08:53:36Z","cross_cats_sorted":[],"title_canon_sha256":"6e1b50c5054d997bf080b0e536f0dd64a2bca9329afaac45d564a4e5801c5164","abstract_canon_sha256":"22f7a8b77029923a39df44206bf93f88e47f66ce5d0eb4c13966724e56fa6445"},"schema_version":"1.0"},"canonical_sha256":"f590b7cb88c8434cfb17a7faa2baca51a466c5080d265e1fb450763621232a8c","source":{"kind":"arxiv","id":"1903.11839","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.11839","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"arxiv_version","alias_value":"1903.11839v2","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.11839","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"pith_short_12","alias_value":"6WILPS4IZBBU","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"6WILPS4IZBBUZ6YX","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"6WILPS4I","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6WILPS4IZBBUZ6YXU75KFOWKKG","target":"record","payload":{"canonical_record":{"source":{"id":"1903.11839","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-28T08:53:36Z","cross_cats_sorted":[],"title_canon_sha256":"6e1b50c5054d997bf080b0e536f0dd64a2bca9329afaac45d564a4e5801c5164","abstract_canon_sha256":"22f7a8b77029923a39df44206bf93f88e47f66ce5d0eb4c13966724e56fa6445"},"schema_version":"1.0"},"canonical_sha256":"f590b7cb88c8434cfb17a7faa2baca51a466c5080d265e1fb450763621232a8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:11.911514Z","signature_b64":"AbXhro70LpQ/mzuRQOJcT2yua06+zHOyO3t9JzKBGt4axlMnG/CgfYGWavkM2vbZkvGlWpPVIPV9pW/wYO8TBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f590b7cb88c8434cfb17a7faa2baca51a466c5080d265e1fb450763621232a8c","last_reissued_at":"2026-05-17T23:46:11.911046Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:11.911046Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.11839","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":"2026-05-17T23:46:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"knBKq1UXafQkldIeeqVLWJxYOmY0s5jpxWKS9MCNSNjp808INPb0/CtlZcger0+bVab8J7GjXxqlAJT/hUesBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:52:03.352851Z"},"content_sha256":"e9ba4f5b2eab0a248953e4c23aa59619b43416fbf195be5c93691b829d769f6a","schema_version":"1.0","event_id":"sha256:e9ba4f5b2eab0a248953e4c23aa59619b43416fbf195be5c93691b829d769f6a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6WILPS4IZBBUZ6YXU75KFOWKKG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Average motion of emerging solar active region polarities I: Two phases of emergence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Aaron C. Birch, Douglas C. Braun, Hannah Schunker, Laurent Gizon, Raymond B. Burston, Robert H. Cameron","submitted_at":"2019-03-28T08:53:36Z","abstract_excerpt":"Our goal is to constrain models of active region formation by tracking the average motion of active region polarity pairs as they emerge onto the surface. We measured the motion of the two main opposite polarities in 153 emerging active regions (EARs) using line-of-sight magnetic field observations from the Solar Dynamics Observatory Helioseismic Emerging Active Region (SDO/HEAR) survey (Schunker et al. 2016). We first measured the position of each of the polarities eight hours after emergence and tracked their location forwards and backwards in time. We find that, on average, the polarities e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.11839","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":"2026-05-17T23:46:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"espqOSHW3bd1JdOlJvtG9owHnaho9yENkLK+NVKLPYPRs7uNlOG1D95dSm/S2mqS5a9wk5ur/NM/WMZQi4jmCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:52:03.353192Z"},"content_sha256":"435e754ba6da677dc93cc47c561c61e8be7b1ba90204f38bf84205c4e17b3caa","schema_version":"1.0","event_id":"sha256:435e754ba6da677dc93cc47c561c61e8be7b1ba90204f38bf84205c4e17b3caa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6WILPS4IZBBUZ6YXU75KFOWKKG/bundle.json","state_url":"https://pith.science/pith/6WILPS4IZBBUZ6YXU75KFOWKKG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6WILPS4IZBBUZ6YXU75KFOWKKG/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":"2026-06-02T23:52:03Z","links":{"resolver":"https://pith.science/pith/6WILPS4IZBBUZ6YXU75KFOWKKG","bundle":"https://pith.science/pith/6WILPS4IZBBUZ6YXU75KFOWKKG/bundle.json","state":"https://pith.science/pith/6WILPS4IZBBUZ6YXU75KFOWKKG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6WILPS4IZBBUZ6YXU75KFOWKKG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6WILPS4IZBBUZ6YXU75KFOWKKG","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":"22f7a8b77029923a39df44206bf93f88e47f66ce5d0eb4c13966724e56fa6445","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-28T08:53:36Z","title_canon_sha256":"6e1b50c5054d997bf080b0e536f0dd64a2bca9329afaac45d564a4e5801c5164"},"schema_version":"1.0","source":{"id":"1903.11839","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.11839","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"arxiv_version","alias_value":"1903.11839v2","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.11839","created_at":"2026-05-17T23:46:11Z"},{"alias_kind":"pith_short_12","alias_value":"6WILPS4IZBBU","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"6WILPS4IZBBUZ6YX","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"6WILPS4I","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:435e754ba6da677dc93cc47c561c61e8be7b1ba90204f38bf84205c4e17b3caa","target":"graph","created_at":"2026-05-17T23:46:11Z","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":"Our goal is to constrain models of active region formation by tracking the average motion of active region polarity pairs as they emerge onto the surface. We measured the motion of the two main opposite polarities in 153 emerging active regions (EARs) using line-of-sight magnetic field observations from the Solar Dynamics Observatory Helioseismic Emerging Active Region (SDO/HEAR) survey (Schunker et al. 2016). We first measured the position of each of the polarities eight hours after emergence and tracked their location forwards and backwards in time. We find that, on average, the polarities e","authors_text":"Aaron C. Birch, Douglas C. Braun, Hannah Schunker, Laurent Gizon, Raymond B. Burston, Robert H. Cameron","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-28T08:53:36Z","title":"Average motion of emerging solar active region polarities I: Two phases of emergence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.11839","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:e9ba4f5b2eab0a248953e4c23aa59619b43416fbf195be5c93691b829d769f6a","target":"record","created_at":"2026-05-17T23:46:11Z","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":"22f7a8b77029923a39df44206bf93f88e47f66ce5d0eb4c13966724e56fa6445","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-03-28T08:53:36Z","title_canon_sha256":"6e1b50c5054d997bf080b0e536f0dd64a2bca9329afaac45d564a4e5801c5164"},"schema_version":"1.0","source":{"id":"1903.11839","kind":"arxiv","version":2}},"canonical_sha256":"f590b7cb88c8434cfb17a7faa2baca51a466c5080d265e1fb450763621232a8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f590b7cb88c8434cfb17a7faa2baca51a466c5080d265e1fb450763621232a8c","first_computed_at":"2026-05-17T23:46:11.911046Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:11.911046Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AbXhro70LpQ/mzuRQOJcT2yua06+zHOyO3t9JzKBGt4axlMnG/CgfYGWavkM2vbZkvGlWpPVIPV9pW/wYO8TBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:11.911514Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.11839","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9ba4f5b2eab0a248953e4c23aa59619b43416fbf195be5c93691b829d769f6a","sha256:435e754ba6da677dc93cc47c561c61e8be7b1ba90204f38bf84205c4e17b3caa"],"state_sha256":"9bc27fc0013c36c4f4cf7d44c529eed781d3bb3ddc7ad6243a94aa035b405bf9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nXUotmwIheAQwkaPwOsUbehr3VpR47MMKKw3FMoNUvrnF7IoTdgBAFgZfjAplBb1c7iAQrtkbkCHTsLJ+lnpDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:52:03.355117Z","bundle_sha256":"0c75051f7274f47d301fe865685c0847a7a4647cdb69c2b914187bfb9a99ae4f"}}