{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ETKWP56JUX2QQC3MKAJ6QH3PBD","short_pith_number":"pith:ETKWP56J","canonical_record":{"source":{"id":"1604.05610","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-19T14:57:29Z","cross_cats_sorted":[],"title_canon_sha256":"fd6d7c7cf04d5f6fa43c121378f9dc24a6d3e6e0ec245d0f133909eced0898bb","abstract_canon_sha256":"834c82c8857d2b88abbc9816c9081666ea79b10de84ed807ed6a0e7455b98b1f"},"schema_version":"1.0"},"canonical_sha256":"24d567f7c9a5f5080b6c5013e81f6f08c67cd5982cb36d3c390d73d4ed4a5384","source":{"kind":"arxiv","id":"1604.05610","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.05610","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1604.05610v1","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05610","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"ETKWP56JUX2Q","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"ETKWP56JUX2QQC3M","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"ETKWP56J","created_at":"2026-05-18T12:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ETKWP56JUX2QQC3MKAJ6QH3PBD","target":"record","payload":{"canonical_record":{"source":{"id":"1604.05610","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-19T14:57:29Z","cross_cats_sorted":[],"title_canon_sha256":"fd6d7c7cf04d5f6fa43c121378f9dc24a6d3e6e0ec245d0f133909eced0898bb","abstract_canon_sha256":"834c82c8857d2b88abbc9816c9081666ea79b10de84ed807ed6a0e7455b98b1f"},"schema_version":"1.0"},"canonical_sha256":"24d567f7c9a5f5080b6c5013e81f6f08c67cd5982cb36d3c390d73d4ed4a5384","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:31.037176Z","signature_b64":"aNCcJ57tSZxE3XMcap45thJnRtBEQawxlWmfS1ftu9E6GR30i+LyyxPcKi7b0FaY6mrzNptLVRR3j80jkw/ODg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24d567f7c9a5f5080b6c5013e81f6f08c67cd5982cb36d3c390d73d4ed4a5384","last_reissued_at":"2026-05-18T01:11:31.036820Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:31.036820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.05610","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CBQr/fDquj8do3jBS94zbOPd+89c0d2eK7lqLT1R/14KRzjQFIAYeMJLo6UWqHIMnUwBJobc739pHkvILLsPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:11:12.813404Z"},"content_sha256":"d9cddc12837c83a5fdb6dfb86a2d47ba03ef8e0848a8dbf9033c24a337f3484d","schema_version":"1.0","event_id":"sha256:d9cddc12837c83a5fdb6dfb86a2d47ba03ef8e0848a8dbf9033c24a337f3484d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ETKWP56JUX2QQC3MKAJ6QH3PBD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Formation of the penumbra and start of the Evershed flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"F. Zuccarello, M. Murabito, P. Romano, S.K. Solanki, S. L. Guglielmino","submitted_at":"2016-04-19T14:57:29Z","abstract_excerpt":"We studied the variations of line-of-sight photospheric plasma flows during the formation phase of the penumbra around a pore in Active Region NOAA 11490. We used a high spatial, spectral, and temporal resolution data set acquired by the Interferometric BIdimensional Spectrometer (IBIS) operating at the NSO/Dunn Solar Telescope as well as data taken by the Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory satellite (SDO/HMI). Before the penumbra formed we observed a redshift of the spectral line in the inner part of the annular zone surrounding the pore as well as a blues"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05610","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KFU9jJYppAuZyLM1sMbZr05hZT3cGSkjCbU4TNISChD1+SHvadAYKGz0xcTTUeHJ35E1G5JqA9GkWOQCi/hNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:11:12.814055Z"},"content_sha256":"4c857a4e7b38e5d243e702c805ed51ff00783e39aa7fe96fa9705c1a5e87ff32","schema_version":"1.0","event_id":"sha256:4c857a4e7b38e5d243e702c805ed51ff00783e39aa7fe96fa9705c1a5e87ff32"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ETKWP56JUX2QQC3MKAJ6QH3PBD/bundle.json","state_url":"https://pith.science/pith/ETKWP56JUX2QQC3MKAJ6QH3PBD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ETKWP56JUX2QQC3MKAJ6QH3PBD/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":"2026-05-30T12:11:12Z","links":{"resolver":"https://pith.science/pith/ETKWP56JUX2QQC3MKAJ6QH3PBD","bundle":"https://pith.science/pith/ETKWP56JUX2QQC3MKAJ6QH3PBD/bundle.json","state":"https://pith.science/pith/ETKWP56JUX2QQC3MKAJ6QH3PBD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ETKWP56JUX2QQC3MKAJ6QH3PBD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ETKWP56JUX2QQC3MKAJ6QH3PBD","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":"834c82c8857d2b88abbc9816c9081666ea79b10de84ed807ed6a0e7455b98b1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-19T14:57:29Z","title_canon_sha256":"fd6d7c7cf04d5f6fa43c121378f9dc24a6d3e6e0ec245d0f133909eced0898bb"},"schema_version":"1.0","source":{"id":"1604.05610","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.05610","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1604.05610v1","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05610","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"ETKWP56JUX2Q","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"ETKWP56JUX2QQC3M","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"ETKWP56J","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:4c857a4e7b38e5d243e702c805ed51ff00783e39aa7fe96fa9705c1a5e87ff32","target":"graph","created_at":"2026-05-18T01:11:31Z","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":"We studied the variations of line-of-sight photospheric plasma flows during the formation phase of the penumbra around a pore in Active Region NOAA 11490. We used a high spatial, spectral, and temporal resolution data set acquired by the Interferometric BIdimensional Spectrometer (IBIS) operating at the NSO/Dunn Solar Telescope as well as data taken by the Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory satellite (SDO/HMI). Before the penumbra formed we observed a redshift of the spectral line in the inner part of the annular zone surrounding the pore as well as a blues","authors_text":"F. Zuccarello, M. Murabito, P. Romano, S.K. Solanki, S. L. Guglielmino","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-19T14:57:29Z","title":"Formation of the penumbra and start of the Evershed flow"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05610","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:d9cddc12837c83a5fdb6dfb86a2d47ba03ef8e0848a8dbf9033c24a337f3484d","target":"record","created_at":"2026-05-18T01:11:31Z","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":"834c82c8857d2b88abbc9816c9081666ea79b10de84ed807ed6a0e7455b98b1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-19T14:57:29Z","title_canon_sha256":"fd6d7c7cf04d5f6fa43c121378f9dc24a6d3e6e0ec245d0f133909eced0898bb"},"schema_version":"1.0","source":{"id":"1604.05610","kind":"arxiv","version":1}},"canonical_sha256":"24d567f7c9a5f5080b6c5013e81f6f08c67cd5982cb36d3c390d73d4ed4a5384","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24d567f7c9a5f5080b6c5013e81f6f08c67cd5982cb36d3c390d73d4ed4a5384","first_computed_at":"2026-05-18T01:11:31.036820Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:31.036820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aNCcJ57tSZxE3XMcap45thJnRtBEQawxlWmfS1ftu9E6GR30i+LyyxPcKi7b0FaY6mrzNptLVRR3j80jkw/ODg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:31.037176Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.05610","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d9cddc12837c83a5fdb6dfb86a2d47ba03ef8e0848a8dbf9033c24a337f3484d","sha256:4c857a4e7b38e5d243e702c805ed51ff00783e39aa7fe96fa9705c1a5e87ff32"],"state_sha256":"9da85ecaef13228681cabe78725e766d4212184300c0523a02a5828d2c71f058"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kfoT9/XYqjqEIziywy3kSPX+XP7AZuGiJGLLoRZax0j8CR+So7FqHGdttWWm4IxtAgMhKdBToKeohOnoIjxRBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T12:11:12.816459Z","bundle_sha256":"2c3e6779a7987b609fd4e26f4b56d6db41b63ef5ea706adef08a1fd748c7983f"}}