{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:ZDAA5HP2ZRQR2HMN7NJ5W7PJZW","short_pith_number":"pith:ZDAA5HP2","canonical_record":{"source":{"id":"0807.2862","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-17T22:10:08Z","cross_cats_sorted":[],"title_canon_sha256":"202f2eeaebff8b2fafadd8b7c351dc0b8604387bbaf93693d4cf832cb018233e","abstract_canon_sha256":"fb9bc817b94dfe00303b01c2688db5d746d0ccec9186162f8e261198c74bea8a"},"schema_version":"1.0"},"canonical_sha256":"c8c00e9dfacc611d1d8dfb53db7de9cd9c38d22d34dcf278f83f27629c2c2027","source":{"kind":"arxiv","id":"0807.2862","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.2862","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"arxiv_version","alias_value":"0807.2862v2","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.2862","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"pith_short_12","alias_value":"ZDAA5HP2ZRQR","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"ZDAA5HP2ZRQR2HMN","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"ZDAA5HP2","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:ZDAA5HP2ZRQR2HMN7NJ5W7PJZW","target":"record","payload":{"canonical_record":{"source":{"id":"0807.2862","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-17T22:10:08Z","cross_cats_sorted":[],"title_canon_sha256":"202f2eeaebff8b2fafadd8b7c351dc0b8604387bbaf93693d4cf832cb018233e","abstract_canon_sha256":"fb9bc817b94dfe00303b01c2688db5d746d0ccec9186162f8e261198c74bea8a"},"schema_version":"1.0"},"canonical_sha256":"c8c00e9dfacc611d1d8dfb53db7de9cd9c38d22d34dcf278f83f27629c2c2027","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:33.209739Z","signature_b64":"uMXe/UPJbupwfvjelPEpTUPQqwC6qlGTyodHrVDrWilr0cKU3JdPtI0kDRKHl3hdE7BXO9TT5yZxIc43Q0cSDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c8c00e9dfacc611d1d8dfb53db7de9cd9c38d22d34dcf278f83f27629c2c2027","last_reissued_at":"2026-05-18T04:29:33.209369Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:33.209369Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0807.2862","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":"2026-05-18T04:29:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V+THswcjQDOOuDMBM8u2lvXD294EeEX+M62WQ5SBqVvm0+9bfCRfNHuScO69KHHkNNn2wCUfK9cBWJKJtBg9Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T18:16:37.474268Z"},"content_sha256":"fc2875b2b3cd08b43d5f57b710379acc1973b75da526a2c6f605695a04c21f82","schema_version":"1.0","event_id":"sha256:fc2875b2b3cd08b43d5f57b710379acc1973b75da526a2c6f605695a04c21f82"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:ZDAA5HP2ZRQR2HMN7NJ5W7PJZW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Testing Magnetic Star Formation Theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Nicholas Hakobian, Richard M. Crutcher, Thomas H. Troland","submitted_at":"2008-07-17T22:10:08Z","abstract_excerpt":"We report here observations of the Zeeman effect in the 18-cm lines of OH in the envelope regions surrounding four molecular cloud cores toward which detections of B(LOS) have been achieved in the same lines, and evaluate the ratio of mass to magnetic flux, M/Phi, between the cloud core and envelope. This relative M/Phi measurement reduces uncertainties in previous studies, such as the angle between B and the line of sight and the value of [OH/H]. Our result is that for all four clouds, the ratios R of the core to the envelope values of M/Phi are less than 1. Stated another way, the ratios R' "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.2862","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":"2026-05-18T04:29:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wsjmHJR8RWszFCnGIvaew1fx/qEmGDfIIUMc40/U2ACL840Q7zxCmtwDHSxlKR3mTT3NqvqSPIug8j/XT7L5Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T18:16:37.474612Z"},"content_sha256":"e8234797fd1af9d53f56cc56eb4e04fc343144562fd0dd6f140a6dbb6db576fa","schema_version":"1.0","event_id":"sha256:e8234797fd1af9d53f56cc56eb4e04fc343144562fd0dd6f140a6dbb6db576fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZDAA5HP2ZRQR2HMN7NJ5W7PJZW/bundle.json","state_url":"https://pith.science/pith/ZDAA5HP2ZRQR2HMN7NJ5W7PJZW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZDAA5HP2ZRQR2HMN7NJ5W7PJZW/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":"2026-08-06T18:16:37Z","links":{"resolver":"https://pith.science/pith/ZDAA5HP2ZRQR2HMN7NJ5W7PJZW","bundle":"https://pith.science/pith/ZDAA5HP2ZRQR2HMN7NJ5W7PJZW/bundle.json","state":"https://pith.science/pith/ZDAA5HP2ZRQR2HMN7NJ5W7PJZW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZDAA5HP2ZRQR2HMN7NJ5W7PJZW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:ZDAA5HP2ZRQR2HMN7NJ5W7PJZW","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":"fb9bc817b94dfe00303b01c2688db5d746d0ccec9186162f8e261198c74bea8a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-17T22:10:08Z","title_canon_sha256":"202f2eeaebff8b2fafadd8b7c351dc0b8604387bbaf93693d4cf832cb018233e"},"schema_version":"1.0","source":{"id":"0807.2862","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.2862","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"arxiv_version","alias_value":"0807.2862v2","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.2862","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"pith_short_12","alias_value":"ZDAA5HP2ZRQR","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"ZDAA5HP2ZRQR2HMN","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"ZDAA5HP2","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:e8234797fd1af9d53f56cc56eb4e04fc343144562fd0dd6f140a6dbb6db576fa","target":"graph","created_at":"2026-05-18T04:29:33Z","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 report here observations of the Zeeman effect in the 18-cm lines of OH in the envelope regions surrounding four molecular cloud cores toward which detections of B(LOS) have been achieved in the same lines, and evaluate the ratio of mass to magnetic flux, M/Phi, between the cloud core and envelope. This relative M/Phi measurement reduces uncertainties in previous studies, such as the angle between B and the line of sight and the value of [OH/H]. Our result is that for all four clouds, the ratios R of the core to the envelope values of M/Phi are less than 1. Stated another way, the ratios R' ","authors_text":"Nicholas Hakobian, Richard M. Crutcher, Thomas H. Troland","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-17T22:10:08Z","title":"Testing Magnetic Star Formation Theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.2862","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:fc2875b2b3cd08b43d5f57b710379acc1973b75da526a2c6f605695a04c21f82","target":"record","created_at":"2026-05-18T04:29:33Z","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":"fb9bc817b94dfe00303b01c2688db5d746d0ccec9186162f8e261198c74bea8a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-07-17T22:10:08Z","title_canon_sha256":"202f2eeaebff8b2fafadd8b7c351dc0b8604387bbaf93693d4cf832cb018233e"},"schema_version":"1.0","source":{"id":"0807.2862","kind":"arxiv","version":2}},"canonical_sha256":"c8c00e9dfacc611d1d8dfb53db7de9cd9c38d22d34dcf278f83f27629c2c2027","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8c00e9dfacc611d1d8dfb53db7de9cd9c38d22d34dcf278f83f27629c2c2027","first_computed_at":"2026-05-18T04:29:33.209369Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:33.209369Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uMXe/UPJbupwfvjelPEpTUPQqwC6qlGTyodHrVDrWilr0cKU3JdPtI0kDRKHl3hdE7BXO9TT5yZxIc43Q0cSDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:33.209739Z","signed_message":"canonical_sha256_bytes"},"source_id":"0807.2862","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc2875b2b3cd08b43d5f57b710379acc1973b75da526a2c6f605695a04c21f82","sha256:e8234797fd1af9d53f56cc56eb4e04fc343144562fd0dd6f140a6dbb6db576fa"],"state_sha256":"5d75a797d6cbf70a5fa1b14baabbf1697051d3abeb529f112febbeaa088bc56a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PSIhkuhOScIuB+1tqv/5KjUPKuWeL0ebxCiT1DJS2CRk/6T7fynLgfbi88mHZBPjvUxiudCG1AyjnVTBIoodCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T18:16:37.477215Z","bundle_sha256":"3f9cfe41176376e29d414267c96997cfa294a8958c42b66c55d1f951273d5fd9"}}