{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1998:FVTNMURKWQ43CCO7UNC2CKLNH3","short_pith_number":"pith:FVTNMURK","schema_version":"1.0","canonical_sha256":"2d66d6522ab439b109dfa345a1296d3ee8741a72b7794236c53c82556d2bbfb1","source":{"kind":"arxiv","id":"astro-ph/9803231","version":1},"attestation_state":"computed","paper":{"title":"Proper Motions of Ionized Gas at the Galactic Center: Evidence for Unbound Orbiting Gas","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D.A. Roberts, F. Yusef-Zadeh, J. Biretta","submitted_at":"1998-03-19T18:14:26Z","abstract_excerpt":"We present radio continuum observations of the spiral-shaped ionized feature (Sgr A West) within the inner pc of the Galactic center at three epochs spanning 1986 to 1995. The VLA A-configuration was used at $\\lambda$2cm (resolution of 0\\dasec1$\\times$0\\dasec2). We detect proper motions of a number of features in the Northern and Eastern Arms of Sgr A West including the ionized gas associated with IRS 13 with V(RA)= 113 \\pm 10, V(Dec)=150 \\pm15 km/s, IRS 2 with V(RA)= 122 \\pm 11, V(Dec)=24 \\pm 34 km/s and the Norther Arm V(RA)= 126 \\pm 30, V(Dec)=--207 \\pm 58 km/s. We also report the detection"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"astro-ph/9803231","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-03-19T18:14:26Z","cross_cats_sorted":[],"title_canon_sha256":"fea31adc29758777ac26187874cc92f182673f5ede96784de23902655a240d57","abstract_canon_sha256":"b97d89c4df988307c2cbbd816d7c7548d87cdd686c39f9344445de92c3540d0a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:37.714140Z","signature_b64":"wItSwEzz1qRcG9JOHj7uLedHuE3YVwsWik8+/J6A9EWnpZLpL6+K45sC3R3MFwJ5G+Pn12XEMY2bpMO25poDAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d66d6522ab439b109dfa345a1296d3ee8741a72b7794236c53c82556d2bbfb1","last_reissued_at":"2026-05-18T01:07:37.713491Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:37.713491Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Proper Motions of Ionized Gas at the Galactic Center: Evidence for Unbound Orbiting Gas","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D.A. Roberts, F. Yusef-Zadeh, J. Biretta","submitted_at":"1998-03-19T18:14:26Z","abstract_excerpt":"We present radio continuum observations of the spiral-shaped ionized feature (Sgr A West) within the inner pc of the Galactic center at three epochs spanning 1986 to 1995. The VLA A-configuration was used at $\\lambda$2cm (resolution of 0\\dasec1$\\times$0\\dasec2). We detect proper motions of a number of features in the Northern and Eastern Arms of Sgr A West including the ionized gas associated with IRS 13 with V(RA)= 113 \\pm 10, V(Dec)=150 \\pm15 km/s, IRS 2 with V(RA)= 122 \\pm 11, V(Dec)=24 \\pm 34 km/s and the Norther Arm V(RA)= 126 \\pm 30, V(Dec)=--207 \\pm 58 km/s. We also report the detection"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9803231","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9803231","created_at":"2026-05-18T01:07:37.713587+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9803231v1","created_at":"2026-05-18T01:07:37.713587+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9803231","created_at":"2026-05-18T01:07:37.713587+00:00"},{"alias_kind":"pith_short_12","alias_value":"FVTNMURKWQ43","created_at":"2026-05-18T12:25:49.038998+00:00"},{"alias_kind":"pith_short_16","alias_value":"FVTNMURKWQ43CCO7","created_at":"2026-05-18T12:25:49.038998+00:00"},{"alias_kind":"pith_short_8","alias_value":"FVTNMURK","created_at":"2026-05-18T12:25:49.038998+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3","json":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3.json","graph_json":"https://pith.science/api/pith-number/FVTNMURKWQ43CCO7UNC2CKLNH3/graph.json","events_json":"https://pith.science/api/pith-number/FVTNMURKWQ43CCO7UNC2CKLNH3/events.json","paper":"https://pith.science/paper/FVTNMURK"},"agent_actions":{"view_html":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3","download_json":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3.json","view_paper":"https://pith.science/paper/FVTNMURK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9803231&json=true","fetch_graph":"https://pith.science/api/pith-number/FVTNMURKWQ43CCO7UNC2CKLNH3/graph.json","fetch_events":"https://pith.science/api/pith-number/FVTNMURKWQ43CCO7UNC2CKLNH3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/action/storage_attestation","attest_author":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/action/author_attestation","sign_citation":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/action/citation_signature","submit_replication":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/action/replication_record"}},"created_at":"2026-05-18T01:07:37.713587+00:00","updated_at":"2026-05-18T01:07:37.713587+00:00"}