{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ONPVGHWBHXU27RALVTBU6ITOLI","short_pith_number":"pith:ONPVGHWB","canonical_record":{"source":{"id":"1308.0466","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-02T11:15:24Z","cross_cats_sorted":[],"title_canon_sha256":"c904d37f7bd3513e8c9c80f4960473d4fef7653a25d7e1b0b5275dca913918c4","abstract_canon_sha256":"2655502b6ba24fb36a8ad5b15ae89e086d9111a08539459458d5e1e780f767ea"},"schema_version":"1.0"},"canonical_sha256":"735f531ec13de9afc40bacc34f226e5a08a3d34fd7cd6eb6e71884c2d08e3d82","source":{"kind":"arxiv","id":"1308.0466","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.0466","created_at":"2026-05-18T01:48:24Z"},{"alias_kind":"arxiv_version","alias_value":"1308.0466v1","created_at":"2026-05-18T01:48:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.0466","created_at":"2026-05-18T01:48:24Z"},{"alias_kind":"pith_short_12","alias_value":"ONPVGHWBHXU2","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"ONPVGHWBHXU27RAL","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"ONPVGHWB","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ONPVGHWBHXU27RALVTBU6ITOLI","target":"record","payload":{"canonical_record":{"source":{"id":"1308.0466","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-02T11:15:24Z","cross_cats_sorted":[],"title_canon_sha256":"c904d37f7bd3513e8c9c80f4960473d4fef7653a25d7e1b0b5275dca913918c4","abstract_canon_sha256":"2655502b6ba24fb36a8ad5b15ae89e086d9111a08539459458d5e1e780f767ea"},"schema_version":"1.0"},"canonical_sha256":"735f531ec13de9afc40bacc34f226e5a08a3d34fd7cd6eb6e71884c2d08e3d82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:24.748851Z","signature_b64":"HkIwSFOYdjEhKiMhhj0BkOhDmI8H70iSw0yuSPWZ52GpWdZIq5rJfrCIQNqNXk2lCc4TEyFjqGpKUWZ1wxr9Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"735f531ec13de9afc40bacc34f226e5a08a3d34fd7cd6eb6e71884c2d08e3d82","last_reissued_at":"2026-05-18T01:48:24.748136Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:24.748136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.0466","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":"2026-05-18T01:48:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pVSHFZd3ZMtNJtpNu7Szb39kP+rX9y6hs8UBDGkJ42MRBc8diEz3co2LT/n9/EJJoBA5j9Y1xOQl8SVrrMKGCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T19:26:29.045584Z"},"content_sha256":"6735e7d56e2e5de39264932f7c57185992a4a8f722ba677316f26b49ef31a557","schema_version":"1.0","event_id":"sha256:6735e7d56e2e5de39264932f7c57185992a4a8f722ba677316f26b49ef31a557"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ONPVGHWBHXU27RALVTBU6ITOLI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Peripheral downflows in sunspot penumbrae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andreas Lagg, Michiel van Noort, Sami Solanki, Sanjiv Tiwari","submitted_at":"2013-08-02T11:15:24Z","abstract_excerpt":"Sunspot penumbrae show high-velocity patches along the periphery. The high-velocity downflow patches are believed to be the return channels of the Evershed flow. We aim to investigate their structure in detail using Hinode SOT/SP observations. We employ Fourier interpolation in combination with spatially coupled height dependent LTE inversions of Stokes profiles to produce high-resolution, height-dependent maps of atmospheric parameters of these downflows and investigate their properties. High-speed downflows are observed over a wide range of viewing angles. They have supersonic line-of-sight "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.0466","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":"2026-05-18T01:48:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wDcV8+eTbLnSo7CxNNIqiWqAdSAkEbaL69B3A7ECovgx4Z8ghR31FQN9RiZBWu5hrOCgCLceOoVMTTPaZhHDCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T19:26:29.045926Z"},"content_sha256":"373b059ae78e486c99b992f8aad9b9c0621b84eab2e8b82dc598e3e29139b62a","schema_version":"1.0","event_id":"sha256:373b059ae78e486c99b992f8aad9b9c0621b84eab2e8b82dc598e3e29139b62a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ONPVGHWBHXU27RALVTBU6ITOLI/bundle.json","state_url":"https://pith.science/pith/ONPVGHWBHXU27RALVTBU6ITOLI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ONPVGHWBHXU27RALVTBU6ITOLI/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":"2026-06-02T19:26:29Z","links":{"resolver":"https://pith.science/pith/ONPVGHWBHXU27RALVTBU6ITOLI","bundle":"https://pith.science/pith/ONPVGHWBHXU27RALVTBU6ITOLI/bundle.json","state":"https://pith.science/pith/ONPVGHWBHXU27RALVTBU6ITOLI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ONPVGHWBHXU27RALVTBU6ITOLI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ONPVGHWBHXU27RALVTBU6ITOLI","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":"2655502b6ba24fb36a8ad5b15ae89e086d9111a08539459458d5e1e780f767ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-02T11:15:24Z","title_canon_sha256":"c904d37f7bd3513e8c9c80f4960473d4fef7653a25d7e1b0b5275dca913918c4"},"schema_version":"1.0","source":{"id":"1308.0466","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.0466","created_at":"2026-05-18T01:48:24Z"},{"alias_kind":"arxiv_version","alias_value":"1308.0466v1","created_at":"2026-05-18T01:48:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.0466","created_at":"2026-05-18T01:48:24Z"},{"alias_kind":"pith_short_12","alias_value":"ONPVGHWBHXU2","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"ONPVGHWBHXU27RAL","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"ONPVGHWB","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:373b059ae78e486c99b992f8aad9b9c0621b84eab2e8b82dc598e3e29139b62a","target":"graph","created_at":"2026-05-18T01:48:24Z","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":"Sunspot penumbrae show high-velocity patches along the periphery. The high-velocity downflow patches are believed to be the return channels of the Evershed flow. We aim to investigate their structure in detail using Hinode SOT/SP observations. We employ Fourier interpolation in combination with spatially coupled height dependent LTE inversions of Stokes profiles to produce high-resolution, height-dependent maps of atmospheric parameters of these downflows and investigate their properties. High-speed downflows are observed over a wide range of viewing angles. They have supersonic line-of-sight ","authors_text":"Andreas Lagg, Michiel van Noort, Sami Solanki, Sanjiv Tiwari","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-02T11:15:24Z","title":"Peripheral downflows in sunspot penumbrae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.0466","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":"sha256:6735e7d56e2e5de39264932f7c57185992a4a8f722ba677316f26b49ef31a557","target":"record","created_at":"2026-05-18T01:48:24Z","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":"2655502b6ba24fb36a8ad5b15ae89e086d9111a08539459458d5e1e780f767ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-08-02T11:15:24Z","title_canon_sha256":"c904d37f7bd3513e8c9c80f4960473d4fef7653a25d7e1b0b5275dca913918c4"},"schema_version":"1.0","source":{"id":"1308.0466","kind":"arxiv","version":1}},"canonical_sha256":"735f531ec13de9afc40bacc34f226e5a08a3d34fd7cd6eb6e71884c2d08e3d82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"735f531ec13de9afc40bacc34f226e5a08a3d34fd7cd6eb6e71884c2d08e3d82","first_computed_at":"2026-05-18T01:48:24.748136Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:24.748136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HkIwSFOYdjEhKiMhhj0BkOhDmI8H70iSw0yuSPWZ52GpWdZIq5rJfrCIQNqNXk2lCc4TEyFjqGpKUWZ1wxr9Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:24.748851Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.0466","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6735e7d56e2e5de39264932f7c57185992a4a8f722ba677316f26b49ef31a557","sha256:373b059ae78e486c99b992f8aad9b9c0621b84eab2e8b82dc598e3e29139b62a"],"state_sha256":"4a7bfb00125205d4f58a9412b84496fe880643a6d750fbbec969fcd4aa51a015"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MLbu9NygS2pgLO5H6gsNeBTc8XNYNoNc6YWmtfl+wpHbtMPLGfuPLjXZQMI+TDZyA/8TQA5ypbzrdHfTaorzAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T19:26:29.047918Z","bundle_sha256":"47ff267249b9b003d4e6563bdc19c37a31f1c0bdd3761ffe1f917e17154e9f8d"}}