{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:SJ3JUM2PHJC4ZFL3TZUFJ7AQBM","short_pith_number":"pith:SJ3JUM2P","canonical_record":{"source":{"id":"1511.00685","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-02T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"f1c930c7b783fc0512278ab145528b46ac8f0aea5b30afeea36f84025f6ef8c2","abstract_canon_sha256":"b9a3587bb6c03ecae35a62dfb2fb3d027badb877373ed82b4c4c364c5445f227"},"schema_version":"1.0"},"canonical_sha256":"92769a334f3a45cc957b9e6854fc100b36d5296734819cfbc74abc438fbd2db4","source":{"kind":"arxiv","id":"1511.00685","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.00685","created_at":"2026-05-18T01:25:33Z"},{"alias_kind":"arxiv_version","alias_value":"1511.00685v1","created_at":"2026-05-18T01:25:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.00685","created_at":"2026-05-18T01:25:33Z"},{"alias_kind":"pith_short_12","alias_value":"SJ3JUM2PHJC4","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SJ3JUM2PHJC4ZFL3","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SJ3JUM2P","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:SJ3JUM2PHJC4ZFL3TZUFJ7AQBM","target":"record","payload":{"canonical_record":{"source":{"id":"1511.00685","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-02T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"f1c930c7b783fc0512278ab145528b46ac8f0aea5b30afeea36f84025f6ef8c2","abstract_canon_sha256":"b9a3587bb6c03ecae35a62dfb2fb3d027badb877373ed82b4c4c364c5445f227"},"schema_version":"1.0"},"canonical_sha256":"92769a334f3a45cc957b9e6854fc100b36d5296734819cfbc74abc438fbd2db4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:33.409992Z","signature_b64":"/y9m2FG+jk4t0agF1qr7BCyV4PrrJ1Owd//6/QPDRIDR+2oq0CkB8bkgm4mQKZxwulCCOs8yoCATBvl0N0baBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"92769a334f3a45cc957b9e6854fc100b36d5296734819cfbc74abc438fbd2db4","last_reissued_at":"2026-05-18T01:25:33.409493Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:33.409493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.00685","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":"2026-05-18T01:25:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VgL6+8ZV02S3Jmq2c7e4RjL2Ph5NC4UkdsDdwJ/pkxXwEILUxIWJU5dO14+qpXi+piNfve1dnkhrwPcm6n5+Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:42:54.191935Z"},"content_sha256":"ead4c6c6857f724e56a3cce47b39621a3ab031d753852c670e503a82fa16bcd3","schema_version":"1.0","event_id":"sha256:ead4c6c6857f724e56a3cce47b39621a3ab031d753852c670e503a82fa16bcd3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:SJ3JUM2PHJC4ZFL3TZUFJ7AQBM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High Resolution 8 mm and 1 cm Polarization of IRAS 4A from the VLA Nascent Disk and Multiplicity (VANDAM) Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Carl Melis, Claire J. Chandler, Dominique M. Segura-Cox, Erin G. Cox, John Tobin, Kaitlin Kratter, Laura M. Perez, Leslie W. Looney, {\\L}ukasz Tychoniec, Michael M. Dunham, Robert J. Harris, Sarah I. Sadavoy, Zhi-Yun Li","submitted_at":"2015-11-02T21:00:01Z","abstract_excerpt":"Magnetic fields can regulate disk formation, accretion and jet launching. Until recently, it has been difficult to obtain high resolution observations of the magnetic fields of the youngest protostars in the critical region near the protostar. The VANDAM survey is observing all known protostars in the Perseus Molecular Cloud. Here we present the polarization data of IRAS 4A. We find that with ~ 0.2'' (50 AU) resolution at {\\lambda} = 8.1 and 10.3 mm, the inferred magnetic field is consistent with a circular morphology, in marked contrast with the hourglass morphology seen on larger scales. Thi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.00685","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":"2026-05-18T01:25:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eQDUJfzDyCoT6psIFMi6w3F1vZdGMzDGmpvKNIthPzDwzOPlVfglZw6QylJtY+e49UEE6BzjuDqlDe8UczNHAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T10:42:54.192293Z"},"content_sha256":"46fd30aa54a49d0260d0f10a7eb66a7f583559e91b45dbd9dcfdb189d03cb30d","schema_version":"1.0","event_id":"sha256:46fd30aa54a49d0260d0f10a7eb66a7f583559e91b45dbd9dcfdb189d03cb30d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SJ3JUM2PHJC4ZFL3TZUFJ7AQBM/bundle.json","state_url":"https://pith.science/pith/SJ3JUM2PHJC4ZFL3TZUFJ7AQBM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SJ3JUM2PHJC4ZFL3TZUFJ7AQBM/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":"2026-06-09T10:42:54Z","links":{"resolver":"https://pith.science/pith/SJ3JUM2PHJC4ZFL3TZUFJ7AQBM","bundle":"https://pith.science/pith/SJ3JUM2PHJC4ZFL3TZUFJ7AQBM/bundle.json","state":"https://pith.science/pith/SJ3JUM2PHJC4ZFL3TZUFJ7AQBM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SJ3JUM2PHJC4ZFL3TZUFJ7AQBM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:SJ3JUM2PHJC4ZFL3TZUFJ7AQBM","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":"b9a3587bb6c03ecae35a62dfb2fb3d027badb877373ed82b4c4c364c5445f227","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-02T21:00:01Z","title_canon_sha256":"f1c930c7b783fc0512278ab145528b46ac8f0aea5b30afeea36f84025f6ef8c2"},"schema_version":"1.0","source":{"id":"1511.00685","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.00685","created_at":"2026-05-18T01:25:33Z"},{"alias_kind":"arxiv_version","alias_value":"1511.00685v1","created_at":"2026-05-18T01:25:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.00685","created_at":"2026-05-18T01:25:33Z"},{"alias_kind":"pith_short_12","alias_value":"SJ3JUM2PHJC4","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SJ3JUM2PHJC4ZFL3","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SJ3JUM2P","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:46fd30aa54a49d0260d0f10a7eb66a7f583559e91b45dbd9dcfdb189d03cb30d","target":"graph","created_at":"2026-05-18T01:25:33Z","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":"Magnetic fields can regulate disk formation, accretion and jet launching. Until recently, it has been difficult to obtain high resolution observations of the magnetic fields of the youngest protostars in the critical region near the protostar. The VANDAM survey is observing all known protostars in the Perseus Molecular Cloud. Here we present the polarization data of IRAS 4A. We find that with ~ 0.2'' (50 AU) resolution at {\\lambda} = 8.1 and 10.3 mm, the inferred magnetic field is consistent with a circular morphology, in marked contrast with the hourglass morphology seen on larger scales. Thi","authors_text":"Carl Melis, Claire J. Chandler, Dominique M. Segura-Cox, Erin G. Cox, John Tobin, Kaitlin Kratter, Laura M. Perez, Leslie W. Looney, {\\L}ukasz Tychoniec, Michael M. Dunham, Robert J. Harris, Sarah I. Sadavoy, Zhi-Yun Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-02T21:00:01Z","title":"High Resolution 8 mm and 1 cm Polarization of IRAS 4A from the VLA Nascent Disk and Multiplicity (VANDAM) Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.00685","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:ead4c6c6857f724e56a3cce47b39621a3ab031d753852c670e503a82fa16bcd3","target":"record","created_at":"2026-05-18T01:25:33Z","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":"b9a3587bb6c03ecae35a62dfb2fb3d027badb877373ed82b4c4c364c5445f227","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-02T21:00:01Z","title_canon_sha256":"f1c930c7b783fc0512278ab145528b46ac8f0aea5b30afeea36f84025f6ef8c2"},"schema_version":"1.0","source":{"id":"1511.00685","kind":"arxiv","version":1}},"canonical_sha256":"92769a334f3a45cc957b9e6854fc100b36d5296734819cfbc74abc438fbd2db4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"92769a334f3a45cc957b9e6854fc100b36d5296734819cfbc74abc438fbd2db4","first_computed_at":"2026-05-18T01:25:33.409493Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:33.409493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/y9m2FG+jk4t0agF1qr7BCyV4PrrJ1Owd//6/QPDRIDR+2oq0CkB8bkgm4mQKZxwulCCOs8yoCATBvl0N0baBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:33.409992Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.00685","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ead4c6c6857f724e56a3cce47b39621a3ab031d753852c670e503a82fa16bcd3","sha256:46fd30aa54a49d0260d0f10a7eb66a7f583559e91b45dbd9dcfdb189d03cb30d"],"state_sha256":"8a51121ee40cdba2c7c56b77e9495ece8f7a1355d550e43db3e400d56b08b7fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R5QLzO7XDqfT1OjgU/IOA5benCoOKbvOIOojnd9JuHeVzCIqH68J5iZjdHmaxfsd/v46zZhVavkYmM/HyXBRAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T10:42:54.194745Z","bundle_sha256":"3611c6c102f4adbc258af075cf784fbbc13a2d5e4e5dd98d7210ba07bd256a34"}}