{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:A2UASS4TUMKTEG5TLVS3BCCYTS","short_pith_number":"pith:A2UASS4T","canonical_record":{"source":{"id":"1903.11065","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-26T14:27:59Z","cross_cats_sorted":[],"title_canon_sha256":"db953e1a394525a9f02b9bc6f331f99586494d2ef73cfff60760c5ba0d65a300","abstract_canon_sha256":"86863773fc8d5b2933e0f87b343f7faa5e2b8666727ca7dbf00bc38ac54e29a3"},"schema_version":"1.0"},"canonical_sha256":"06a8094b93a315321bb35d65b088589cbe02bb5d302f60852ac5e52002fdac82","source":{"kind":"arxiv","id":"1903.11065","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.11065","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"arxiv_version","alias_value":"1903.11065v1","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.11065","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"pith_short_12","alias_value":"A2UASS4TUMKT","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"A2UASS4TUMKTEG5T","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"A2UASS4T","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:A2UASS4TUMKTEG5TLVS3BCCYTS","target":"record","payload":{"canonical_record":{"source":{"id":"1903.11065","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-26T14:27:59Z","cross_cats_sorted":[],"title_canon_sha256":"db953e1a394525a9f02b9bc6f331f99586494d2ef73cfff60760c5ba0d65a300","abstract_canon_sha256":"86863773fc8d5b2933e0f87b343f7faa5e2b8666727ca7dbf00bc38ac54e29a3"},"schema_version":"1.0"},"canonical_sha256":"06a8094b93a315321bb35d65b088589cbe02bb5d302f60852ac5e52002fdac82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:04.222859Z","signature_b64":"vfWl8s8dgM0I9u1kE8cf9uGrYYEUcQomxN8+yaq4adEE0oemXk8FS5YpVEfhgPtcB1nZ5/gZDwoUyAy+6ahWCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"06a8094b93a315321bb35d65b088589cbe02bb5d302f60852ac5e52002fdac82","last_reissued_at":"2026-05-17T23:50:04.222293Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:04.222293Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.11065","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":"2026-05-17T23:50:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Ts4PATj1j5YX5h+yLm/yoUKVPeYvohIqJ4ZHbBsuLVI0v4y18WL2PodkDSqStKMKqu0TqNiH6ZO7+Svd/EPAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:17:35.873634Z"},"content_sha256":"fa5976db24c5c0db8b3f5a11cdfe66031da0c30e4a945ac763436c8bcd6464d6","schema_version":"1.0","event_id":"sha256:fa5976db24c5c0db8b3f5a11cdfe66031da0c30e4a945ac763436c8bcd6464d6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:A2UASS4TUMKTEG5TLVS3BCCYTS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Precision measurement of magnetic field from near to far, from fine to large scales in ISM","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cecile Gry, Francesco Leone, Francois Boulanger, Huirong Yan","submitted_at":"2019-03-26T14:27:59Z","abstract_excerpt":"Magnetic fields have important or dominant effects in many areas of astrophysics, but have been very difficult to quantify. Spectropolarimetry from Ground State Alignment (GSA) has been suggested as a direct tracer of magnetic field in interstellar diffuse medium. Owing to the long life of the atoms on ground states the Larmor precession in an external magnetic field imprints the direction of the field onto the polarization of absorbing species. This provides a unique tool for studies of sub-gauss magnetic fields using polarimetry of UV, optical and radio lines. Many spectral lines with strong"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.11065","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":"2026-05-17T23:50:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"typwSN3uok6G+5cIxpst2TWzj3Sxsm5Cr/yv7z9j9iPfWFmIPkBtMMHQV2z8nUh0ZuvzoTdL+GG4pGbXB7vGBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:17:35.874163Z"},"content_sha256":"dcaa554ab253f4cf3bf59db16ba7e00de01fb22aa213c0001e6c84ca0341723f","schema_version":"1.0","event_id":"sha256:dcaa554ab253f4cf3bf59db16ba7e00de01fb22aa213c0001e6c84ca0341723f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A2UASS4TUMKTEG5TLVS3BCCYTS/bundle.json","state_url":"https://pith.science/pith/A2UASS4TUMKTEG5TLVS3BCCYTS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A2UASS4TUMKTEG5TLVS3BCCYTS/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":"2026-05-31T08:17:35Z","links":{"resolver":"https://pith.science/pith/A2UASS4TUMKTEG5TLVS3BCCYTS","bundle":"https://pith.science/pith/A2UASS4TUMKTEG5TLVS3BCCYTS/bundle.json","state":"https://pith.science/pith/A2UASS4TUMKTEG5TLVS3BCCYTS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A2UASS4TUMKTEG5TLVS3BCCYTS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:A2UASS4TUMKTEG5TLVS3BCCYTS","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":"86863773fc8d5b2933e0f87b343f7faa5e2b8666727ca7dbf00bc38ac54e29a3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-26T14:27:59Z","title_canon_sha256":"db953e1a394525a9f02b9bc6f331f99586494d2ef73cfff60760c5ba0d65a300"},"schema_version":"1.0","source":{"id":"1903.11065","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.11065","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"arxiv_version","alias_value":"1903.11065v1","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.11065","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"pith_short_12","alias_value":"A2UASS4TUMKT","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"A2UASS4TUMKTEG5T","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"A2UASS4T","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:dcaa554ab253f4cf3bf59db16ba7e00de01fb22aa213c0001e6c84ca0341723f","target":"graph","created_at":"2026-05-17T23:50:04Z","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":"Magnetic fields have important or dominant effects in many areas of astrophysics, but have been very difficult to quantify. Spectropolarimetry from Ground State Alignment (GSA) has been suggested as a direct tracer of magnetic field in interstellar diffuse medium. Owing to the long life of the atoms on ground states the Larmor precession in an external magnetic field imprints the direction of the field onto the polarization of absorbing species. This provides a unique tool for studies of sub-gauss magnetic fields using polarimetry of UV, optical and radio lines. Many spectral lines with strong","authors_text":"Cecile Gry, Francesco Leone, Francois Boulanger, Huirong Yan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-26T14:27:59Z","title":"Precision measurement of magnetic field from near to far, from fine to large scales in ISM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.11065","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:fa5976db24c5c0db8b3f5a11cdfe66031da0c30e4a945ac763436c8bcd6464d6","target":"record","created_at":"2026-05-17T23:50:04Z","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":"86863773fc8d5b2933e0f87b343f7faa5e2b8666727ca7dbf00bc38ac54e29a3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-26T14:27:59Z","title_canon_sha256":"db953e1a394525a9f02b9bc6f331f99586494d2ef73cfff60760c5ba0d65a300"},"schema_version":"1.0","source":{"id":"1903.11065","kind":"arxiv","version":1}},"canonical_sha256":"06a8094b93a315321bb35d65b088589cbe02bb5d302f60852ac5e52002fdac82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"06a8094b93a315321bb35d65b088589cbe02bb5d302f60852ac5e52002fdac82","first_computed_at":"2026-05-17T23:50:04.222293Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:04.222293Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vfWl8s8dgM0I9u1kE8cf9uGrYYEUcQomxN8+yaq4adEE0oemXk8FS5YpVEfhgPtcB1nZ5/gZDwoUyAy+6ahWCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:04.222859Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.11065","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fa5976db24c5c0db8b3f5a11cdfe66031da0c30e4a945ac763436c8bcd6464d6","sha256:dcaa554ab253f4cf3bf59db16ba7e00de01fb22aa213c0001e6c84ca0341723f"],"state_sha256":"c2a8a38994a4f30fe83ce0dcc73837e90184fcebb3baa5da2228785808179eee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cGgVeCZ0lIhGOctXZnpDJFJ7f8//0qgVZU4qtvVQuluyrylkKq2T/OX3XHqkqdCu2ZAYa8ZwhF/sxS62iCHGCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T08:17:35.877460Z","bundle_sha256":"80f97be7c1cd2b3d366b6f85df375a840e6537d39c15cfb647f427bcd0bcbb45"}}