{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:L5HM3PZHYUUPY34KWYI3AYMEMZ","short_pith_number":"pith:L5HM3PZH","canonical_record":{"source":{"id":"1911.07397","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-18T01:54:58Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"ad1e63e14391933b1091ba7e3f47e25d0c3b136064712c7253fc2f6c766632fa","abstract_canon_sha256":"6025e88707d03cc1c4e9edfc44e5332cc0eb7ae3d0b15551a96736a90319acab"},"schema_version":"1.0"},"canonical_sha256":"5f4ecdbf27c528fc6f8ab611b06184665f859f9e06ba439d21ed2a9a88f1a6a2","source":{"kind":"arxiv","id":"1911.07397","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.07397","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"arxiv_version","alias_value":"1911.07397v1","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.07397","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"pith_short_12","alias_value":"L5HM3PZHYUUP","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"pith_short_16","alias_value":"L5HM3PZHYUUPY34K","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"pith_short_8","alias_value":"L5HM3PZH","created_at":"2026-07-05T01:00:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:L5HM3PZHYUUPY34KWYI3AYMEMZ","target":"record","payload":{"canonical_record":{"source":{"id":"1911.07397","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-18T01:54:58Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"ad1e63e14391933b1091ba7e3f47e25d0c3b136064712c7253fc2f6c766632fa","abstract_canon_sha256":"6025e88707d03cc1c4e9edfc44e5332cc0eb7ae3d0b15551a96736a90319acab"},"schema_version":"1.0"},"canonical_sha256":"5f4ecdbf27c528fc6f8ab611b06184665f859f9e06ba439d21ed2a9a88f1a6a2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:00:36.152938Z","signature_b64":"HiACoI2ipP/dmUc9rQ63Zi0aSgvedRmfnlICsw71tlR/sLQ0oAxKPaQqFoIhnJr4WzujkUY+7WTQ3rQfMdGzAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f4ecdbf27c528fc6f8ab611b06184665f859f9e06ba439d21ed2a9a88f1a6a2","last_reissued_at":"2026-07-05T01:00:36.152437Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:00:36.152437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.07397","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":"2026-07-05T01:00:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OZ+62mREpFhKpF8FxHRKuojjT73mXezMQjLZDyf13ioLohqEbIsrDx123K2zZhFJ3OaNAmsVAEJV3kpc3wWeCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T07:39:49.871975Z"},"content_sha256":"1013c1dab87b32f41642f317d5bb5ee620818a38c3dccf4086b8a9dca98b508b","schema_version":"1.0","event_id":"sha256:1013c1dab87b32f41642f317d5bb5ee620818a38c3dccf4086b8a9dca98b508b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:L5HM3PZHYUUPY34KWYI3AYMEMZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectro-polarimetric Observations at the NVST: I. Instrumental Polarization Calibration and Primary Measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"Dong-Guang Wang, Jian-Guo Peng, Jun-Feng Hou, Jun Xu, Kai-Fan Ji, Shu Yuan, Yuan-Yong Deng, Yu-Chao Chen, Zhen-Yu Jin, Zhi Xu, Zhong Liu","submitted_at":"2019-11-18T01:54:58Z","abstract_excerpt":"This paper is devoted to the primary spectro-polarimetric observation performed at the New Vacuum Solar Telescope of China since 2017, and our aim is to precisely evaluate the real polarimetric accuracy and sensitivity of this polarimetry by using full Stokes spectro-polarimetric observations of the photospheric line Fe I 532.4 nm. In the work, we briefly describe the salient characteristic of the NVST as a polarimeter in technology and then characterize its instrumental polarization based on the operation in 2017 and 2019. It is verified that the calibration method making use of the instrumen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.07397","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.07397/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:00:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8UahOg0zZo6SD3AWVZN1qBWMcukb0TEus3bloV05qbdpjsKN74NdiJj2/XX/qKcMU9Enn6rmN+PLNAwN50KHAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T07:39:49.872351Z"},"content_sha256":"c7c85ac14ab07e4d7692c07b2e1b480a672edaa30828529d22b2aa6970b441e7","schema_version":"1.0","event_id":"sha256:c7c85ac14ab07e4d7692c07b2e1b480a672edaa30828529d22b2aa6970b441e7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L5HM3PZHYUUPY34KWYI3AYMEMZ/bundle.json","state_url":"https://pith.science/pith/L5HM3PZHYUUPY34KWYI3AYMEMZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L5HM3PZHYUUPY34KWYI3AYMEMZ/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":"2026-07-25T07:39:49Z","links":{"resolver":"https://pith.science/pith/L5HM3PZHYUUPY34KWYI3AYMEMZ","bundle":"https://pith.science/pith/L5HM3PZHYUUPY34KWYI3AYMEMZ/bundle.json","state":"https://pith.science/pith/L5HM3PZHYUUPY34KWYI3AYMEMZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L5HM3PZHYUUPY34KWYI3AYMEMZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:L5HM3PZHYUUPY34KWYI3AYMEMZ","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":"6025e88707d03cc1c4e9edfc44e5332cc0eb7ae3d0b15551a96736a90319acab","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-18T01:54:58Z","title_canon_sha256":"ad1e63e14391933b1091ba7e3f47e25d0c3b136064712c7253fc2f6c766632fa"},"schema_version":"1.0","source":{"id":"1911.07397","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.07397","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"arxiv_version","alias_value":"1911.07397v1","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.07397","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"pith_short_12","alias_value":"L5HM3PZHYUUP","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"pith_short_16","alias_value":"L5HM3PZHYUUPY34K","created_at":"2026-07-05T01:00:36Z"},{"alias_kind":"pith_short_8","alias_value":"L5HM3PZH","created_at":"2026-07-05T01:00:36Z"}],"graph_snapshots":[{"event_id":"sha256:c7c85ac14ab07e4d7692c07b2e1b480a672edaa30828529d22b2aa6970b441e7","target":"graph","created_at":"2026-07-05T01:00:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1911.07397/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper is devoted to the primary spectro-polarimetric observation performed at the New Vacuum Solar Telescope of China since 2017, and our aim is to precisely evaluate the real polarimetric accuracy and sensitivity of this polarimetry by using full Stokes spectro-polarimetric observations of the photospheric line Fe I 532.4 nm. In the work, we briefly describe the salient characteristic of the NVST as a polarimeter in technology and then characterize its instrumental polarization based on the operation in 2017 and 2019. It is verified that the calibration method making use of the instrumen","authors_text":"Dong-Guang Wang, Jian-Guo Peng, Jun-Feng Hou, Jun Xu, Kai-Fan Ji, Shu Yuan, Yuan-Yong Deng, Yu-Chao Chen, Zhen-Yu Jin, Zhi Xu, Zhong Liu","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-18T01:54:58Z","title":"Spectro-polarimetric Observations at the NVST: I. Instrumental Polarization Calibration and Primary Measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.07397","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":"sha256:1013c1dab87b32f41642f317d5bb5ee620818a38c3dccf4086b8a9dca98b508b","target":"record","created_at":"2026-07-05T01:00:36Z","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":"6025e88707d03cc1c4e9edfc44e5332cc0eb7ae3d0b15551a96736a90319acab","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-11-18T01:54:58Z","title_canon_sha256":"ad1e63e14391933b1091ba7e3f47e25d0c3b136064712c7253fc2f6c766632fa"},"schema_version":"1.0","source":{"id":"1911.07397","kind":"arxiv","version":1}},"canonical_sha256":"5f4ecdbf27c528fc6f8ab611b06184665f859f9e06ba439d21ed2a9a88f1a6a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f4ecdbf27c528fc6f8ab611b06184665f859f9e06ba439d21ed2a9a88f1a6a2","first_computed_at":"2026-07-05T01:00:36.152437Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:00:36.152437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HiACoI2ipP/dmUc9rQ63Zi0aSgvedRmfnlICsw71tlR/sLQ0oAxKPaQqFoIhnJr4WzujkUY+7WTQ3rQfMdGzAw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:00:36.152938Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.07397","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1013c1dab87b32f41642f317d5bb5ee620818a38c3dccf4086b8a9dca98b508b","sha256:c7c85ac14ab07e4d7692c07b2e1b480a672edaa30828529d22b2aa6970b441e7"],"state_sha256":"ce83b9ad834f2e34f32eebe5f73e1ccd1793e04a6ba9bd2ff643221459b48983"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a1YowmzkJFRzCLwWXj9dMtjmXIub5zQhDlFztzvAInKGoRpzV89IqW7KAN9dSajlGmXIgBwqPBLeyOFJ67bVAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T07:39:49.874843Z","bundle_sha256":"5577cec011aa7df8ccbe057c1008be7e9dacdb6d4545f1b6e5e8879897a05987"}}