{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:YWQLUZ3FDXGMD2DGJRY2PR7I3M","short_pith_number":"pith:YWQLUZ3F","canonical_record":{"source":{"id":"1804.10089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-26T14:34:50Z","cross_cats_sorted":[],"title_canon_sha256":"b383d5942340f8d59f08b24f2a0f22e8c20b8113df6cc32aacd4f79bcff9f31b","abstract_canon_sha256":"f2c31d36ce8302f79e0feac6f818d2c008ec892bec3465b0ee37de123a7e4b91"},"schema_version":"1.0"},"canonical_sha256":"c5a0ba67651dccc1e8664c71a7c7e8db249bd03d5578da1f04864396241338e1","source":{"kind":"arxiv","id":"1804.10089","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.10089","created_at":"2026-05-18T00:17:25Z"},{"alias_kind":"arxiv_version","alias_value":"1804.10089v1","created_at":"2026-05-18T00:17:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10089","created_at":"2026-05-18T00:17:25Z"},{"alias_kind":"pith_short_12","alias_value":"YWQLUZ3FDXGM","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YWQLUZ3FDXGMD2DG","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YWQLUZ3F","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:YWQLUZ3FDXGMD2DGJRY2PR7I3M","target":"record","payload":{"canonical_record":{"source":{"id":"1804.10089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-26T14:34:50Z","cross_cats_sorted":[],"title_canon_sha256":"b383d5942340f8d59f08b24f2a0f22e8c20b8113df6cc32aacd4f79bcff9f31b","abstract_canon_sha256":"f2c31d36ce8302f79e0feac6f818d2c008ec892bec3465b0ee37de123a7e4b91"},"schema_version":"1.0"},"canonical_sha256":"c5a0ba67651dccc1e8664c71a7c7e8db249bd03d5578da1f04864396241338e1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:25.142241Z","signature_b64":"RIYUrB+fkx24sVDHmAcIUZy74kgnMQOc0DPgntTTRK66c541zVtoTtJFqgiqJOikIVbxtB08opYuRx0a0vPqDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5a0ba67651dccc1e8664c71a7c7e8db249bd03d5578da1f04864396241338e1","last_reissued_at":"2026-05-18T00:17:25.141642Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:25.141642Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.10089","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":"2026-05-18T00:17:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vd54OZK3tzioFsYcJ+PlZxL9KpwyfLQhWUZiFPfRbfT97h3RXLUJabTid53OvFLgfiexFI6wggTwVbOM1eD+Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:41:41.826593Z"},"content_sha256":"e46f053f2f5949db445f7e4d64e5b9b083d6e9cb2d86d3a2999f82f4efcfa10d","schema_version":"1.0","event_id":"sha256:e46f053f2f5949db445f7e4d64e5b9b083d6e9cb2d86d3a2999f82f4efcfa10d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:YWQLUZ3FDXGMD2DGJRY2PR7I3M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Inference of magnetic fields in the very quiet Sun","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Asensio Ramos, A. Feller, A. Hofmann, A. Lagg, A. Pastor Yabar, C. Denker, C. Kuckein, D. Orozco, D. Schmidt, D. Soltau, F. Kneer, H. Balthasar, H. Nicklas, H. P. Doerr, J. Staude, K. G. Strassmeier, M. Collados, M. Franz, M. J. Mart\\' inez Gonz\\'alez, M. Sigwarth, M. Sobotka, M. Verma, O. von der Lu\\\"uhe, R. Louis, R. Rezaei, R. Schlichenmaier, R. Volkmer, S. J. Gonza\\'alez Manrique, S. K. Solanki, T. Berkefeld, T. Waldman, W. Schmidt","submitted_at":"2018-04-26T14:34:50Z","abstract_excerpt":"We present high-precision spectro-polarimetric data with high spatial resolution (0.4$''$) of the very quiet Sun at 1.56$\\mu$m obtained with the GREGOR telescope to shed some light on this complex magnetism. Half of our observed quiet-Sun region is better explained by magnetic substructure within the resolution element. However, we cannot distinguish whether this substructure comes from gradients of the physical parameters along the line of sight or from horizontal gradients (across the surface). In these pixels, a model with two magnetic components is preferred, and we find two distinct magne"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10089","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":"2026-05-18T00:17:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eEFbcbr52HZDqdnnbw11im9RAAV5OHvxvKRxsAc0gsZL01KA1P5J/rxDGHuHPtWzmeMuXTrGm6FyUf1hYRZgBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:41:41.827412Z"},"content_sha256":"6f194a69ebd28f4267f8318eb588e78e502e0526bc103dffa8dc9a041a00d114","schema_version":"1.0","event_id":"sha256:6f194a69ebd28f4267f8318eb588e78e502e0526bc103dffa8dc9a041a00d114"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YWQLUZ3FDXGMD2DGJRY2PR7I3M/bundle.json","state_url":"https://pith.science/pith/YWQLUZ3FDXGMD2DGJRY2PR7I3M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YWQLUZ3FDXGMD2DGJRY2PR7I3M/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":"2026-05-31T19:41:41Z","links":{"resolver":"https://pith.science/pith/YWQLUZ3FDXGMD2DGJRY2PR7I3M","bundle":"https://pith.science/pith/YWQLUZ3FDXGMD2DGJRY2PR7I3M/bundle.json","state":"https://pith.science/pith/YWQLUZ3FDXGMD2DGJRY2PR7I3M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YWQLUZ3FDXGMD2DGJRY2PR7I3M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YWQLUZ3FDXGMD2DGJRY2PR7I3M","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":"f2c31d36ce8302f79e0feac6f818d2c008ec892bec3465b0ee37de123a7e4b91","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-26T14:34:50Z","title_canon_sha256":"b383d5942340f8d59f08b24f2a0f22e8c20b8113df6cc32aacd4f79bcff9f31b"},"schema_version":"1.0","source":{"id":"1804.10089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.10089","created_at":"2026-05-18T00:17:25Z"},{"alias_kind":"arxiv_version","alias_value":"1804.10089v1","created_at":"2026-05-18T00:17:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10089","created_at":"2026-05-18T00:17:25Z"},{"alias_kind":"pith_short_12","alias_value":"YWQLUZ3FDXGM","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YWQLUZ3FDXGMD2DG","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YWQLUZ3F","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:6f194a69ebd28f4267f8318eb588e78e502e0526bc103dffa8dc9a041a00d114","target":"graph","created_at":"2026-05-18T00:17:25Z","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 present high-precision spectro-polarimetric data with high spatial resolution (0.4$''$) of the very quiet Sun at 1.56$\\mu$m obtained with the GREGOR telescope to shed some light on this complex magnetism. Half of our observed quiet-Sun region is better explained by magnetic substructure within the resolution element. However, we cannot distinguish whether this substructure comes from gradients of the physical parameters along the line of sight or from horizontal gradients (across the surface). In these pixels, a model with two magnetic components is preferred, and we find two distinct magne","authors_text":"A. Asensio Ramos, A. Feller, A. Hofmann, A. Lagg, A. Pastor Yabar, C. Denker, C. Kuckein, D. Orozco, D. Schmidt, D. Soltau, F. Kneer, H. Balthasar, H. Nicklas, H. P. Doerr, J. Staude, K. G. Strassmeier, M. Collados, M. Franz, M. J. Mart\\' inez Gonz\\'alez, M. Sigwarth, M. Sobotka, M. Verma, O. von der Lu\\\"uhe, R. Louis, R. Rezaei, R. Schlichenmaier, R. Volkmer, S. J. Gonza\\'alez Manrique, S. K. Solanki, T. Berkefeld, T. Waldman, W. Schmidt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-26T14:34:50Z","title":"Inference of magnetic fields in the very quiet Sun"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10089","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:e46f053f2f5949db445f7e4d64e5b9b083d6e9cb2d86d3a2999f82f4efcfa10d","target":"record","created_at":"2026-05-18T00:17:25Z","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":"f2c31d36ce8302f79e0feac6f818d2c008ec892bec3465b0ee37de123a7e4b91","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-26T14:34:50Z","title_canon_sha256":"b383d5942340f8d59f08b24f2a0f22e8c20b8113df6cc32aacd4f79bcff9f31b"},"schema_version":"1.0","source":{"id":"1804.10089","kind":"arxiv","version":1}},"canonical_sha256":"c5a0ba67651dccc1e8664c71a7c7e8db249bd03d5578da1f04864396241338e1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5a0ba67651dccc1e8664c71a7c7e8db249bd03d5578da1f04864396241338e1","first_computed_at":"2026-05-18T00:17:25.141642Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:25.141642Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RIYUrB+fkx24sVDHmAcIUZy74kgnMQOc0DPgntTTRK66c541zVtoTtJFqgiqJOikIVbxtB08opYuRx0a0vPqDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:25.142241Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.10089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e46f053f2f5949db445f7e4d64e5b9b083d6e9cb2d86d3a2999f82f4efcfa10d","sha256:6f194a69ebd28f4267f8318eb588e78e502e0526bc103dffa8dc9a041a00d114"],"state_sha256":"f1ed427c10c063ded10ec88c745f96a89d921975aa3da16ffea20b17f1468e3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u9lSv/DVs1dtXxGPrjZ0ofHZRpQvr473FAPGQTPjTVQ26HToIpIg1HBJ9AqzGVAHynI/yJchNWtzH3xC+l95CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T19:41:41.831926Z","bundle_sha256":"9a1a9df6309ff8b17dd3520a6237d0eb9e891ee2e8003abd113e1e726ad5a131"}}