{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:H2R2WA3GO7HHTXJ5GY2RBAQNY6","short_pith_number":"pith:H2R2WA3G","canonical_record":{"source":{"id":"1808.06539","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-20T16:01:59Z","cross_cats_sorted":[],"title_canon_sha256":"3dad94eef8d690da1c659ad9b186fed79da8be44ec6ee5cfdd00effb5762702f","abstract_canon_sha256":"e4885008c86bba0bdd902a7c7926e51b139c2a52ab8a3d727248fb4559494b69"},"schema_version":"1.0"},"canonical_sha256":"3ea3ab036677ce79dd3d363510820dc7ab9b5d4d1bddc1f10f7b2ec5b42cc745","source":{"kind":"arxiv","id":"1808.06539","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06539","created_at":"2026-05-17T23:59:51Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06539v2","created_at":"2026-05-17T23:59:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06539","created_at":"2026-05-17T23:59:51Z"},{"alias_kind":"pith_short_12","alias_value":"H2R2WA3GO7HH","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"H2R2WA3GO7HHTXJ5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"H2R2WA3G","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:H2R2WA3GO7HHTXJ5GY2RBAQNY6","target":"record","payload":{"canonical_record":{"source":{"id":"1808.06539","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-20T16:01:59Z","cross_cats_sorted":[],"title_canon_sha256":"3dad94eef8d690da1c659ad9b186fed79da8be44ec6ee5cfdd00effb5762702f","abstract_canon_sha256":"e4885008c86bba0bdd902a7c7926e51b139c2a52ab8a3d727248fb4559494b69"},"schema_version":"1.0"},"canonical_sha256":"3ea3ab036677ce79dd3d363510820dc7ab9b5d4d1bddc1f10f7b2ec5b42cc745","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:51.834119Z","signature_b64":"+ygGtMgNHpUQWsbOuFviJDyT3W+pHaB0GUwZVO3akPjw4GDxZzZLHzWaMaJP2Ga7w8DiXxHoKYtYm6cCi+eyBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ea3ab036677ce79dd3d363510820dc7ab9b5d4d1bddc1f10f7b2ec5b42cc745","last_reissued_at":"2026-05-17T23:59:51.833658Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:51.833658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.06539","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":"2026-05-17T23:59:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"54lyQDyAWgKlnLPbZmMalSgOZsglJz5VAVVJgGSTdHip7AMRfvMwc+IaRRcyL6WAyuWeEuy47YTU6fMfyLlgDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T23:17:58.139425Z"},"content_sha256":"b7671f4a5efd79793ae72f44cafe3b4801d788bae1bade8cd6f9b5eebf0e63ec","schema_version":"1.0","event_id":"sha256:b7671f4a5efd79793ae72f44cafe3b4801d788bae1bade8cd6f9b5eebf0e63ec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:H2R2WA3GO7HHTXJ5GY2RBAQNY6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of spatially structured scattering polarization of Sr I $4607.3$ \\AA \\ with the Fast Solar Polarimeter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Feller, F. A. Iglesias, F. Zeuner, S. K. Solanki","submitted_at":"2018-08-20T16:01:59Z","abstract_excerpt":"Scattering polarization in the Sr I 4607.3 \\AA \\ line observed with high resolution is an important diagnostic of the Sun's atmosphere and magnetism at small spatial scales. At present, spatially resolved observations of this diagnostic are rare and have not been reported as close to the disk center as for $\\mu=0.6$. Our aim is to measure the scattering polarization in the Sr I line at $\\mu=0.6$ and to identify the spatial fluctuations with a statistical approach. Using the Fast Solar Polarimeter (FSP) mounted on the TESOS filtergraph at the German Vacuum Tower Telescope (VTT) in Tenerife, Spa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06539","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":"2026-05-17T23:59:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x3QxPPzYiNWSyDI5PVIY3CSyi3M7cuVB84gD8nfMOM4JF3CDttepHwXZ0n4pcT23EeU4WfEurJWRFczjbbgbAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T23:17:58.140166Z"},"content_sha256":"d84ce90791824b19e2370ad9f79eae41a995cdb5b081e060395a5988e7dab554","schema_version":"1.0","event_id":"sha256:d84ce90791824b19e2370ad9f79eae41a995cdb5b081e060395a5988e7dab554"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H2R2WA3GO7HHTXJ5GY2RBAQNY6/bundle.json","state_url":"https://pith.science/pith/H2R2WA3GO7HHTXJ5GY2RBAQNY6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H2R2WA3GO7HHTXJ5GY2RBAQNY6/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":"2026-05-29T23:17:58Z","links":{"resolver":"https://pith.science/pith/H2R2WA3GO7HHTXJ5GY2RBAQNY6","bundle":"https://pith.science/pith/H2R2WA3GO7HHTXJ5GY2RBAQNY6/bundle.json","state":"https://pith.science/pith/H2R2WA3GO7HHTXJ5GY2RBAQNY6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H2R2WA3GO7HHTXJ5GY2RBAQNY6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:H2R2WA3GO7HHTXJ5GY2RBAQNY6","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":"e4885008c86bba0bdd902a7c7926e51b139c2a52ab8a3d727248fb4559494b69","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-20T16:01:59Z","title_canon_sha256":"3dad94eef8d690da1c659ad9b186fed79da8be44ec6ee5cfdd00effb5762702f"},"schema_version":"1.0","source":{"id":"1808.06539","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.06539","created_at":"2026-05-17T23:59:51Z"},{"alias_kind":"arxiv_version","alias_value":"1808.06539v2","created_at":"2026-05-17T23:59:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.06539","created_at":"2026-05-17T23:59:51Z"},{"alias_kind":"pith_short_12","alias_value":"H2R2WA3GO7HH","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"H2R2WA3GO7HHTXJ5","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"H2R2WA3G","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:d84ce90791824b19e2370ad9f79eae41a995cdb5b081e060395a5988e7dab554","target":"graph","created_at":"2026-05-17T23:59:51Z","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":"Scattering polarization in the Sr I 4607.3 \\AA \\ line observed with high resolution is an important diagnostic of the Sun's atmosphere and magnetism at small spatial scales. At present, spatially resolved observations of this diagnostic are rare and have not been reported as close to the disk center as for $\\mu=0.6$. Our aim is to measure the scattering polarization in the Sr I line at $\\mu=0.6$ and to identify the spatial fluctuations with a statistical approach. Using the Fast Solar Polarimeter (FSP) mounted on the TESOS filtergraph at the German Vacuum Tower Telescope (VTT) in Tenerife, Spa","authors_text":"A. Feller, F. A. Iglesias, F. Zeuner, S. K. Solanki","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-20T16:01:59Z","title":"Detection of spatially structured scattering polarization of Sr I $4607.3$ \\AA \\ with the Fast Solar Polarimeter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.06539","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:b7671f4a5efd79793ae72f44cafe3b4801d788bae1bade8cd6f9b5eebf0e63ec","target":"record","created_at":"2026-05-17T23:59:51Z","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":"e4885008c86bba0bdd902a7c7926e51b139c2a52ab8a3d727248fb4559494b69","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-20T16:01:59Z","title_canon_sha256":"3dad94eef8d690da1c659ad9b186fed79da8be44ec6ee5cfdd00effb5762702f"},"schema_version":"1.0","source":{"id":"1808.06539","kind":"arxiv","version":2}},"canonical_sha256":"3ea3ab036677ce79dd3d363510820dc7ab9b5d4d1bddc1f10f7b2ec5b42cc745","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ea3ab036677ce79dd3d363510820dc7ab9b5d4d1bddc1f10f7b2ec5b42cc745","first_computed_at":"2026-05-17T23:59:51.833658Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:51.833658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+ygGtMgNHpUQWsbOuFviJDyT3W+pHaB0GUwZVO3akPjw4GDxZzZLHzWaMaJP2Ga7w8DiXxHoKYtYm6cCi+eyBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:51.834119Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.06539","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7671f4a5efd79793ae72f44cafe3b4801d788bae1bade8cd6f9b5eebf0e63ec","sha256:d84ce90791824b19e2370ad9f79eae41a995cdb5b081e060395a5988e7dab554"],"state_sha256":"5ece0cb67e2b6c5b3eb832962cdc1429d4ac1dbf9fb46f17bdb178f697f5cfd1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KSzIevggH2GzDYEJRGbg7B+3DoobGz9rM1nJcbbR5UjSU6ktd/3t8KI60Fq75HQnMr78Ny/GHjJqjcZXl+MpCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T23:17:58.143908Z","bundle_sha256":"ac72c354c46f529726360d28c5914f5537b73d62dcff8f3ffadc875cf14b5728"}}