{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:INDT3BARY3NDE33JTWS3XW3BCD","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":"b893ab924cf4c063c3c9fef9c76da855310ace79ab496336b2097d949a7a0dd6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-10-18T02:09:45Z","title_canon_sha256":"1f875da328eb57fc5621b58bad59a11fe0628fb95eedd71371c92477dd5df8c2"},"schema_version":"1.0","source":{"id":"1810.07867","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.07867","created_at":"2026-05-18T00:02:44Z"},{"alias_kind":"arxiv_version","alias_value":"1810.07867v2","created_at":"2026-05-18T00:02:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.07867","created_at":"2026-05-18T00:02:44Z"},{"alias_kind":"pith_short_12","alias_value":"INDT3BARY3ND","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"INDT3BARY3NDE33J","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"INDT3BAR","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:777932912d5291b3b1e7f694aa8537809a9fc8857c5c16c7bc1148fca6eb83c2","target":"graph","created_at":"2026-05-18T00:02:44Z","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":"Detailed mapping of the distributions and kinematics of gases in cometary comae at radio wavelengths can provide fundamental advances in our understanding of cometary activity and outgassing mechanisms. Furthermore, the measurement of molecular abundances in comets provides new insights into the chemical composition of some of the Solar System's oldest and most primitive materials. Here we investigate the opportunities for significant progress in cometary science using a very large radio interferometer. The ngVLA concept will enable detection and mapping of a range of key coma species in the 1","authors_text":"C. Qi, M. A. Cordiner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-10-18T02:09:45Z","title":"Science with an ngVLA: High-resolution imaging of comets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.07867","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":"sha256:925bd6336c53eea06cdee60c993930d58a59f2cffa83be2f8fb7f68f2d2b9d57","target":"record","created_at":"2026-05-18T00:02:44Z","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":"b893ab924cf4c063c3c9fef9c76da855310ace79ab496336b2097d949a7a0dd6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-10-18T02:09:45Z","title_canon_sha256":"1f875da328eb57fc5621b58bad59a11fe0628fb95eedd71371c92477dd5df8c2"},"schema_version":"1.0","source":{"id":"1810.07867","kind":"arxiv","version":2}},"canonical_sha256":"43473d8411c6da326f699da5bbdb6110da60e739c820d47a151392d4f305a869","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43473d8411c6da326f699da5bbdb6110da60e739c820d47a151392d4f305a869","first_computed_at":"2026-05-18T00:02:44.070244Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:44.070244Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"P6nrxCzSrJXa39NlVbolTAE4fB8ydSJYg/uc8NMcEjMQCXUbuqEhWZN3L5CWS7ILfoa+a/hbYvD75vu0FJBEDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:44.070763Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.07867","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:925bd6336c53eea06cdee60c993930d58a59f2cffa83be2f8fb7f68f2d2b9d57","sha256:777932912d5291b3b1e7f694aa8537809a9fc8857c5c16c7bc1148fca6eb83c2"],"state_sha256":"5af5402cfefee3ddb95e570afa152a4a6eda626b8575c60260f942ae05923ec9"}