{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZECAO3YZ6CGN6LEYUSXV4E4C6F","short_pith_number":"pith:ZECAO3YZ","canonical_record":{"source":{"id":"1607.01425","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-05T21:56:48Z","cross_cats_sorted":[],"title_canon_sha256":"7ee4995a25dd2a818c1f7399f58068a9c506e025e460a47bcfda2dcc4796c442","abstract_canon_sha256":"b896016adb129b50e9da97a6aa9d1c234b1578ceb53038af7a80cf0389b6eda0"},"schema_version":"1.0"},"canonical_sha256":"c904076f19f08cdf2c98a4af5e1382f174974e8274c2bda7105c26598e5662e1","source":{"kind":"arxiv","id":"1607.01425","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01425","created_at":"2026-05-18T01:11:26Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01425v1","created_at":"2026-05-18T01:11:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01425","created_at":"2026-05-18T01:11:26Z"},{"alias_kind":"pith_short_12","alias_value":"ZECAO3YZ6CGN","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZECAO3YZ6CGN6LEY","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZECAO3YZ","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZECAO3YZ6CGN6LEYUSXV4E4C6F","target":"record","payload":{"canonical_record":{"source":{"id":"1607.01425","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-05T21:56:48Z","cross_cats_sorted":[],"title_canon_sha256":"7ee4995a25dd2a818c1f7399f58068a9c506e025e460a47bcfda2dcc4796c442","abstract_canon_sha256":"b896016adb129b50e9da97a6aa9d1c234b1578ceb53038af7a80cf0389b6eda0"},"schema_version":"1.0"},"canonical_sha256":"c904076f19f08cdf2c98a4af5e1382f174974e8274c2bda7105c26598e5662e1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:26.435225Z","signature_b64":"+hMuIT9aQUMR+BmvCUdfWR4z4kbpD0DfEZ3P+a48LyByrfIRNwwhm57RFLNV8NcJ/hpX3nzIohTku3WLh6FgDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c904076f19f08cdf2c98a4af5e1382f174974e8274c2bda7105c26598e5662e1","last_reissued_at":"2026-05-18T01:11:26.434662Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:26.434662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.01425","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":"2026-05-18T01:11:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KVpnjonrlmVB4p0JoEpVLPUcc5z+80je5Gko42fFzddZpvJnkYcy9i1OzTyVzg2os4lWBwwA6tkgcJFQv6SqCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:09:32.403214Z"},"content_sha256":"7774c04899dc96613ec05ef1d640a205976e66772196cede596e6aec1b488816","schema_version":"1.0","event_id":"sha256:7774c04899dc96613ec05ef1d640a205976e66772196cede596e6aec1b488816"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZECAO3YZ6CGN6LEYUSXV4E4C6F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revolutionizing our View of Protostellar Multiplicity and Disks: The VLA Nascent Disk and Multiplicity (VANDAM) Survey of the Perseus Molecular Cloud","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Carl Melis (UCSD), Claire J. Chandler (NRAO), Dominique Segura-Cox (Illinois), Erin G. Cox (Illinois), John J. Tobin (Leiden), Kaitlin Kratter (Arizona), Laura P\\'erez (MPIfR), Leslie W. Looney (Illinois), Michael M. Dunham (Harvard CfA), Robert J. Harris (Illinois), Sarah I. Sadavoy (MPIA), Zhi-Yun Li (Virginia)","submitted_at":"2016-07-05T21:56:48Z","abstract_excerpt":"There is substantial evidence for disk formation taking place during the early stages of star formation and for most stars being born in multiple systems; however, protostellar multiplicity and disk searches have been hampered by low resolution, sample bias, and variable sensitivity. We have conducted an unbiased, high-sensitivity Karl G. Jansky Very Large Array (VLA) survey toward all known protostars (n = 94) in the Perseus molecular cloud (d~230 pc), with a resolution of ~15 AU (0.06\") at 8 mm. We have detected candidate protostellar disks toward 17 sources (with 12 of those in the Class 0 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01425","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":"2026-05-18T01:11:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f7KDJliN9g43lJZTt6FqxbmnkstrQJ/j5duX3PiRDKhMRbOWNgkYIzmAjWuQIKQGO7YOgY0Y28etRTOgI6z4Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T17:09:32.403574Z"},"content_sha256":"6876ce824a118de40eefcff41167f2f9dff8b96ce67f0582b434984fb485d5dc","schema_version":"1.0","event_id":"sha256:6876ce824a118de40eefcff41167f2f9dff8b96ce67f0582b434984fb485d5dc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZECAO3YZ6CGN6LEYUSXV4E4C6F/bundle.json","state_url":"https://pith.science/pith/ZECAO3YZ6CGN6LEYUSXV4E4C6F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZECAO3YZ6CGN6LEYUSXV4E4C6F/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":"2026-06-01T17:09:32Z","links":{"resolver":"https://pith.science/pith/ZECAO3YZ6CGN6LEYUSXV4E4C6F","bundle":"https://pith.science/pith/ZECAO3YZ6CGN6LEYUSXV4E4C6F/bundle.json","state":"https://pith.science/pith/ZECAO3YZ6CGN6LEYUSXV4E4C6F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZECAO3YZ6CGN6LEYUSXV4E4C6F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZECAO3YZ6CGN6LEYUSXV4E4C6F","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":"b896016adb129b50e9da97a6aa9d1c234b1578ceb53038af7a80cf0389b6eda0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-05T21:56:48Z","title_canon_sha256":"7ee4995a25dd2a818c1f7399f58068a9c506e025e460a47bcfda2dcc4796c442"},"schema_version":"1.0","source":{"id":"1607.01425","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01425","created_at":"2026-05-18T01:11:26Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01425v1","created_at":"2026-05-18T01:11:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01425","created_at":"2026-05-18T01:11:26Z"},{"alias_kind":"pith_short_12","alias_value":"ZECAO3YZ6CGN","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZECAO3YZ6CGN6LEY","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZECAO3YZ","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:6876ce824a118de40eefcff41167f2f9dff8b96ce67f0582b434984fb485d5dc","target":"graph","created_at":"2026-05-18T01:11:26Z","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":"There is substantial evidence for disk formation taking place during the early stages of star formation and for most stars being born in multiple systems; however, protostellar multiplicity and disk searches have been hampered by low resolution, sample bias, and variable sensitivity. We have conducted an unbiased, high-sensitivity Karl G. Jansky Very Large Array (VLA) survey toward all known protostars (n = 94) in the Perseus molecular cloud (d~230 pc), with a resolution of ~15 AU (0.06\") at 8 mm. We have detected candidate protostellar disks toward 17 sources (with 12 of those in the Class 0 ","authors_text":"Carl Melis (UCSD), Claire J. Chandler (NRAO), Dominique Segura-Cox (Illinois), Erin G. Cox (Illinois), John J. Tobin (Leiden), Kaitlin Kratter (Arizona), Laura P\\'erez (MPIfR), Leslie W. Looney (Illinois), Michael M. Dunham (Harvard CfA), Robert J. Harris (Illinois), Sarah I. Sadavoy (MPIA), Zhi-Yun Li (Virginia)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-05T21:56:48Z","title":"Revolutionizing our View of Protostellar Multiplicity and Disks: The VLA Nascent Disk and Multiplicity (VANDAM) Survey of the Perseus Molecular Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01425","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":"sha256:7774c04899dc96613ec05ef1d640a205976e66772196cede596e6aec1b488816","target":"record","created_at":"2026-05-18T01:11:26Z","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":"b896016adb129b50e9da97a6aa9d1c234b1578ceb53038af7a80cf0389b6eda0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-07-05T21:56:48Z","title_canon_sha256":"7ee4995a25dd2a818c1f7399f58068a9c506e025e460a47bcfda2dcc4796c442"},"schema_version":"1.0","source":{"id":"1607.01425","kind":"arxiv","version":1}},"canonical_sha256":"c904076f19f08cdf2c98a4af5e1382f174974e8274c2bda7105c26598e5662e1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c904076f19f08cdf2c98a4af5e1382f174974e8274c2bda7105c26598e5662e1","first_computed_at":"2026-05-18T01:11:26.434662Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:26.434662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+hMuIT9aQUMR+BmvCUdfWR4z4kbpD0DfEZ3P+a48LyByrfIRNwwhm57RFLNV8NcJ/hpX3nzIohTku3WLh6FgDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:26.435225Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.01425","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7774c04899dc96613ec05ef1d640a205976e66772196cede596e6aec1b488816","sha256:6876ce824a118de40eefcff41167f2f9dff8b96ce67f0582b434984fb485d5dc"],"state_sha256":"88d610020e715cc8f3d8522c05f0f041b7f9952d5718cc0d7f977818f021e5e8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EBw6wESTXfmYTIePMG/UtavYXiVsOd+WYyp0hZZCUdHDAIY5xna6t9xylzwhBGYy105FzAMjYVlUZQfIzfFXBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T17:09:32.405510Z","bundle_sha256":"36bfd7c3dba1de12a214f0d0af4e727865df7f3d9cbc5c10b5c5b358925a98f0"}}