{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:NI4DKKSNXO5C44N7WKIYNQZ2Y2","short_pith_number":"pith:NI4DKKSN","canonical_record":{"source":{"id":"1804.05801","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-16T17:23:14Z","cross_cats_sorted":[],"title_canon_sha256":"e268cc89fb43c17a83062c4de7e2eb4d20b9aa73fd13cd3da2f1c396fa9e99d8","abstract_canon_sha256":"67e3580a2c495c2b556ae1ca1141da3d46becbdb4c20bc433f5636ac3b410446"},"schema_version":"1.0"},"canonical_sha256":"6a38352a4dbbba2e71bfb29186c33ac68b3ebc79cf8dc4a082fda0181a0ea250","source":{"kind":"arxiv","id":"1804.05801","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05801","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05801v1","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05801","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"pith_short_12","alias_value":"NI4DKKSNXO5C","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NI4DKKSNXO5C44N7","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NI4DKKSN","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:NI4DKKSNXO5C44N7WKIYNQZ2Y2","target":"record","payload":{"canonical_record":{"source":{"id":"1804.05801","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-16T17:23:14Z","cross_cats_sorted":[],"title_canon_sha256":"e268cc89fb43c17a83062c4de7e2eb4d20b9aa73fd13cd3da2f1c396fa9e99d8","abstract_canon_sha256":"67e3580a2c495c2b556ae1ca1141da3d46becbdb4c20bc433f5636ac3b410446"},"schema_version":"1.0"},"canonical_sha256":"6a38352a4dbbba2e71bfb29186c33ac68b3ebc79cf8dc4a082fda0181a0ea250","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:40.189289Z","signature_b64":"cfIbrOY+aiwVm5UV79KbGRlRWpSZeAKNmnQYSCuKJz5ZOw7VbIW/04DZNEJx67IBQ72rlVO2Dk/qihimgrY9BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a38352a4dbbba2e71bfb29186c33ac68b3ebc79cf8dc4a082fda0181a0ea250","last_reissued_at":"2026-05-18T00:06:40.188882Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:40.188882Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.05801","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":"2026-05-18T00:06:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W7WM3J4gOt6ghtikjyUMdCWmY4GtkniJFf4OcBQTtF6ASVh/hqPog5ouA2ix1I3CgfuQh+Ay88aGBA322FVSDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:44:41.745304Z"},"content_sha256":"6719e4458120e94af7a6e27645600ddb6cada209c5283729393bccc806b1034c","schema_version":"1.0","event_id":"sha256:6719e4458120e94af7a6e27645600ddb6cada209c5283729393bccc806b1034c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:NI4DKKSNXO5C44N7WKIYNQZ2Y2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SMA observations of the polarized dust emission in solar-type Class 0 protostars: the magnetic field properties at envelope scales","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anaelle Maury, Eric Keto, Josep M. Girart, Mathilde Gaudel, Maud Galametz, Qizhou Zhang, Ramprasad Rao, Shih-Ping Lai, Valeska Valdivia","submitted_at":"2018-04-16T17:23:14Z","abstract_excerpt":"Although, from a theoretical point of view, magnetic fields are believed to have a significant role during the early stages of star formation, especially during the main accretion phase, the magnetic field strength and topology is poorly constrained in the youngest accreting Class 0 protostars that lead to the formation of solar-type stars. We carried out observations of the polarized dust continuum emission with the SMA interferometer at 0.87mm, in order to probe the structure of the magnetic field in a sample of 12 low-mass Class 0 envelopes, including both single protostars and multiple sys"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05801","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":"2026-05-18T00:06:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HyUOHKzS+Ws+1MIw9YMBbMkKF5BTNeb0nzD05z5tI3CPMnJrcIflN2J7DymSkAJzTzx8fjRmWuvfLh3XwOktAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:44:41.745669Z"},"content_sha256":"22874735c741884c0f9457822d008e82c7053d9c0a1144e44c671373568bcb5b","schema_version":"1.0","event_id":"sha256:22874735c741884c0f9457822d008e82c7053d9c0a1144e44c671373568bcb5b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NI4DKKSNXO5C44N7WKIYNQZ2Y2/bundle.json","state_url":"https://pith.science/pith/NI4DKKSNXO5C44N7WKIYNQZ2Y2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NI4DKKSNXO5C44N7WKIYNQZ2Y2/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":"2026-05-28T05:44:41Z","links":{"resolver":"https://pith.science/pith/NI4DKKSNXO5C44N7WKIYNQZ2Y2","bundle":"https://pith.science/pith/NI4DKKSNXO5C44N7WKIYNQZ2Y2/bundle.json","state":"https://pith.science/pith/NI4DKKSNXO5C44N7WKIYNQZ2Y2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NI4DKKSNXO5C44N7WKIYNQZ2Y2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NI4DKKSNXO5C44N7WKIYNQZ2Y2","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":"67e3580a2c495c2b556ae1ca1141da3d46becbdb4c20bc433f5636ac3b410446","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-16T17:23:14Z","title_canon_sha256":"e268cc89fb43c17a83062c4de7e2eb4d20b9aa73fd13cd3da2f1c396fa9e99d8"},"schema_version":"1.0","source":{"id":"1804.05801","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05801","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05801v1","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05801","created_at":"2026-05-18T00:06:40Z"},{"alias_kind":"pith_short_12","alias_value":"NI4DKKSNXO5C","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NI4DKKSNXO5C44N7","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NI4DKKSN","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:22874735c741884c0f9457822d008e82c7053d9c0a1144e44c671373568bcb5b","target":"graph","created_at":"2026-05-18T00:06:40Z","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":"Although, from a theoretical point of view, magnetic fields are believed to have a significant role during the early stages of star formation, especially during the main accretion phase, the magnetic field strength and topology is poorly constrained in the youngest accreting Class 0 protostars that lead to the formation of solar-type stars. We carried out observations of the polarized dust continuum emission with the SMA interferometer at 0.87mm, in order to probe the structure of the magnetic field in a sample of 12 low-mass Class 0 envelopes, including both single protostars and multiple sys","authors_text":"Anaelle Maury, Eric Keto, Josep M. Girart, Mathilde Gaudel, Maud Galametz, Qizhou Zhang, Ramprasad Rao, Shih-Ping Lai, Valeska Valdivia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-16T17:23:14Z","title":"SMA observations of the polarized dust emission in solar-type Class 0 protostars: the magnetic field properties at envelope scales"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05801","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":"sha256:6719e4458120e94af7a6e27645600ddb6cada209c5283729393bccc806b1034c","target":"record","created_at":"2026-05-18T00:06:40Z","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":"67e3580a2c495c2b556ae1ca1141da3d46becbdb4c20bc433f5636ac3b410446","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-16T17:23:14Z","title_canon_sha256":"e268cc89fb43c17a83062c4de7e2eb4d20b9aa73fd13cd3da2f1c396fa9e99d8"},"schema_version":"1.0","source":{"id":"1804.05801","kind":"arxiv","version":1}},"canonical_sha256":"6a38352a4dbbba2e71bfb29186c33ac68b3ebc79cf8dc4a082fda0181a0ea250","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a38352a4dbbba2e71bfb29186c33ac68b3ebc79cf8dc4a082fda0181a0ea250","first_computed_at":"2026-05-18T00:06:40.188882Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:40.188882Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cfIbrOY+aiwVm5UV79KbGRlRWpSZeAKNmnQYSCuKJz5ZOw7VbIW/04DZNEJx67IBQ72rlVO2Dk/qihimgrY9BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:40.189289Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.05801","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6719e4458120e94af7a6e27645600ddb6cada209c5283729393bccc806b1034c","sha256:22874735c741884c0f9457822d008e82c7053d9c0a1144e44c671373568bcb5b"],"state_sha256":"4e2240c9eb93272456816e5240b3ff419f11da64026a9399cfebc98d853cb5b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tr8G2w4Ile9n9gqMXdxUpu9039rxIMWO7qdz2uKDn7dTTwTLAGbOi4E4+IeM4ABWef+uYGsp6kN5QVmB5+1gBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T05:44:41.747678Z","bundle_sha256":"a1d05f5075338e2592c02a2318298b2452fa416c66ada2bdd380329d16f6a631"}}