{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:EWAJXOLUIUBSUFVRUVV7HLDBA3","short_pith_number":"pith:EWAJXOLU","canonical_record":{"source":{"id":"1410.4342","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T09:10:59Z","cross_cats_sorted":[],"title_canon_sha256":"43815eb5f01abfa135addba3b25b1902643594744e5ea4dbf0746c92950f9c72","abstract_canon_sha256":"80184e61348102b25131bead8db74ae5fefd708c10b38bdc6a56f62f85a0f590"},"schema_version":"1.0"},"canonical_sha256":"25809bb97445032a16b1a56bf3ac6106c737d633d57af7df2d89b46cde388515","source":{"kind":"arxiv","id":"1410.4342","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.4342","created_at":"2026-05-18T02:03:55Z"},{"alias_kind":"arxiv_version","alias_value":"1410.4342v3","created_at":"2026-05-18T02:03:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.4342","created_at":"2026-05-18T02:03:55Z"},{"alias_kind":"pith_short_12","alias_value":"EWAJXOLUIUBS","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EWAJXOLUIUBSUFVR","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EWAJXOLU","created_at":"2026-05-18T12:28:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:EWAJXOLUIUBSUFVRUVV7HLDBA3","target":"record","payload":{"canonical_record":{"source":{"id":"1410.4342","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T09:10:59Z","cross_cats_sorted":[],"title_canon_sha256":"43815eb5f01abfa135addba3b25b1902643594744e5ea4dbf0746c92950f9c72","abstract_canon_sha256":"80184e61348102b25131bead8db74ae5fefd708c10b38bdc6a56f62f85a0f590"},"schema_version":"1.0"},"canonical_sha256":"25809bb97445032a16b1a56bf3ac6106c737d633d57af7df2d89b46cde388515","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:55.214480Z","signature_b64":"9Q3PEw50WIEnC3bYR5DtpTzueMHhBUO2ox0YRa6ewo+vYUuXz2JPodfsy9kXd1EnFP6en/Q4P0HN8SJGoFpWAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"25809bb97445032a16b1a56bf3ac6106c737d633d57af7df2d89b46cde388515","last_reissued_at":"2026-05-18T02:03:55.213671Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:55.213671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1410.4342","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:03:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ywAXZ/rACA6yPGWLqXtJQSn9Q4xie8ZRWP0Mw4ohW0350EttBqduMRdr4vw7G14O+lVnDPEOR6tyBbL6qQ25Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:42:20.260403Z"},"content_sha256":"a10ff3d29fa69bdd1a8806dfd5d3ac5653b707b94a8ae1aa1de79d478985ad38","schema_version":"1.0","event_id":"sha256:a10ff3d29fa69bdd1a8806dfd5d3ac5653b707b94a8ae1aa1de79d478985ad38"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:EWAJXOLUIUBSUFVRUVV7HLDBA3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracing Magnetic Fields by Atomic Alignment in Extended Radiation Fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Heshou Zhang, Huirong Yan, Le Dong","submitted_at":"2014-10-16T09:10:59Z","abstract_excerpt":"Tracing magnetic fields is crucial as magnetic fields play an important role in many astrophysical processes. Earlier studies have demonstrated that Ground State Alignment (GSA) is a unique way to detect weak magnetic fields (1G> B> 1exp(-15)G) in diffuse media, they consider the situation when the pumping source is a point source, which applies when the star is very far away from the diffuse media. In this paper, we explore the GSA in the presence of extended radiation fields. For the radiation fields with a clear geometric structure, we consider the alignment in circumstellar medium, binary "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.4342","kind":"arxiv","version":3},"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":"2026-05-18T02:03:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bbxQTAohPL3V3/3WnkoySvqyuJbSqA+krPsfMGQ6ZALRSgQNkeoL6DfJck1i1+qJGqDUgrs/jzwd+S6mT4lvCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:42:20.261045Z"},"content_sha256":"49d109ec7df35d0a3f7088a2f7e4fb103a57e07ec59955b51806391e6f2e6c26","schema_version":"1.0","event_id":"sha256:49d109ec7df35d0a3f7088a2f7e4fb103a57e07ec59955b51806391e6f2e6c26"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EWAJXOLUIUBSUFVRUVV7HLDBA3/bundle.json","state_url":"https://pith.science/pith/EWAJXOLUIUBSUFVRUVV7HLDBA3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EWAJXOLUIUBSUFVRUVV7HLDBA3/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":"2026-05-31T04:42:20Z","links":{"resolver":"https://pith.science/pith/EWAJXOLUIUBSUFVRUVV7HLDBA3","bundle":"https://pith.science/pith/EWAJXOLUIUBSUFVRUVV7HLDBA3/bundle.json","state":"https://pith.science/pith/EWAJXOLUIUBSUFVRUVV7HLDBA3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EWAJXOLUIUBSUFVRUVV7HLDBA3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EWAJXOLUIUBSUFVRUVV7HLDBA3","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":"80184e61348102b25131bead8db74ae5fefd708c10b38bdc6a56f62f85a0f590","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T09:10:59Z","title_canon_sha256":"43815eb5f01abfa135addba3b25b1902643594744e5ea4dbf0746c92950f9c72"},"schema_version":"1.0","source":{"id":"1410.4342","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.4342","created_at":"2026-05-18T02:03:55Z"},{"alias_kind":"arxiv_version","alias_value":"1410.4342v3","created_at":"2026-05-18T02:03:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.4342","created_at":"2026-05-18T02:03:55Z"},{"alias_kind":"pith_short_12","alias_value":"EWAJXOLUIUBS","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EWAJXOLUIUBSUFVR","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EWAJXOLU","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:49d109ec7df35d0a3f7088a2f7e4fb103a57e07ec59955b51806391e6f2e6c26","target":"graph","created_at":"2026-05-18T02:03:55Z","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":"Tracing magnetic fields is crucial as magnetic fields play an important role in many astrophysical processes. Earlier studies have demonstrated that Ground State Alignment (GSA) is a unique way to detect weak magnetic fields (1G> B> 1exp(-15)G) in diffuse media, they consider the situation when the pumping source is a point source, which applies when the star is very far away from the diffuse media. In this paper, we explore the GSA in the presence of extended radiation fields. For the radiation fields with a clear geometric structure, we consider the alignment in circumstellar medium, binary ","authors_text":"Heshou Zhang, Huirong Yan, Le Dong","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T09:10:59Z","title":"Tracing Magnetic Fields by Atomic Alignment in Extended Radiation Fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.4342","kind":"arxiv","version":3},"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:a10ff3d29fa69bdd1a8806dfd5d3ac5653b707b94a8ae1aa1de79d478985ad38","target":"record","created_at":"2026-05-18T02:03:55Z","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":"80184e61348102b25131bead8db74ae5fefd708c10b38bdc6a56f62f85a0f590","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-16T09:10:59Z","title_canon_sha256":"43815eb5f01abfa135addba3b25b1902643594744e5ea4dbf0746c92950f9c72"},"schema_version":"1.0","source":{"id":"1410.4342","kind":"arxiv","version":3}},"canonical_sha256":"25809bb97445032a16b1a56bf3ac6106c737d633d57af7df2d89b46cde388515","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"25809bb97445032a16b1a56bf3ac6106c737d633d57af7df2d89b46cde388515","first_computed_at":"2026-05-18T02:03:55.213671Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:55.213671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9Q3PEw50WIEnC3bYR5DtpTzueMHhBUO2ox0YRa6ewo+vYUuXz2JPodfsy9kXd1EnFP6en/Q4P0HN8SJGoFpWAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:55.214480Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.4342","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a10ff3d29fa69bdd1a8806dfd5d3ac5653b707b94a8ae1aa1de79d478985ad38","sha256:49d109ec7df35d0a3f7088a2f7e4fb103a57e07ec59955b51806391e6f2e6c26"],"state_sha256":"a996799863a31391c164305f4e1c1eab575deeaf4a7d0ca3b6403ce2e17f0458"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MtKjqBrjrVpsviv1Zt7an7257r89bapOocIOZhrLNI07AznChlYb5mRhhdn5hw3GbcmdFjGzSYH2Y3vFOkZiAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:42:20.264408Z","bundle_sha256":"45c5c7cc7257c26f3b3850b720e56fe4cfa1acfae637e2d09952b5f8b2927ecf"}}