{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:FVTNMURKWQ43CCO7UNC2CKLNH3","short_pith_number":"pith:FVTNMURK","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"},"canonical_sha256":"2d66d6522ab439b109dfa345a1296d3ee8741a72b7794236c53c82556d2bbfb1","source":{"kind":"arxiv","id":"astro-ph/9803231","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9803231","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9803231v1","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9803231","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"pith_short_12","alias_value":"FVTNMURKWQ43","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"FVTNMURKWQ43CCO7","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"FVTNMURK","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:FVTNMURKWQ43CCO7UNC2CKLNH3","target":"record","payload":{"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"},"canonical_sha256":"2d66d6522ab439b109dfa345a1296d3ee8741a72b7794236c53c82556d2bbfb1","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"},"source_kind":"arxiv","source_id":"astro-ph/9803231","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":"2026-05-18T01:07:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J1KBTobOACL31l86kt1UsQaZidda9dgZlYtiVB7qplMovxK1+h4x6PfTInywyFMER3IsWA9fZSxipBvFKKDQDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:25:51.470017Z"},"content_sha256":"2a9a10b836e7a1e8a25022d98ed9d6d8ca86856b829a8bb7e84b776cace2f966","schema_version":"1.0","event_id":"sha256:2a9a10b836e7a1e8a25022d98ed9d6d8ca86856b829a8bb7e84b776cace2f966"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:FVTNMURKWQ43CCO7UNC2CKLNH3","target":"graph","payload":{"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:07:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ikIPA6mcuxqGpPOPxUfrs47L7GIHD+SnrBhFIUT0X8B1SLTdvNX7z7mK6o81YQTRw3k6329px2i/13ajW+VVBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:25:51.470705Z"},"content_sha256":"edb3219eedcdadd0e9407637e19a574f47572ae6b2569cc1223e1f78e3b7424d","schema_version":"1.0","event_id":"sha256:edb3219eedcdadd0e9407637e19a574f47572ae6b2569cc1223e1f78e3b7424d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/bundle.json","state_url":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/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":"2026-06-10T01:25:51Z","links":{"resolver":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3","bundle":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/bundle.json","state":"https://pith.science/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FVTNMURKWQ43CCO7UNC2CKLNH3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:FVTNMURKWQ43CCO7UNC2CKLNH3","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":"b97d89c4df988307c2cbbd816d7c7548d87cdd686c39f9344445de92c3540d0a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-03-19T18:14:26Z","title_canon_sha256":"fea31adc29758777ac26187874cc92f182673f5ede96784de23902655a240d57"},"schema_version":"1.0","source":{"id":"astro-ph/9803231","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9803231","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9803231v1","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9803231","created_at":"2026-05-18T01:07:37Z"},{"alias_kind":"pith_short_12","alias_value":"FVTNMURKWQ43","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"FVTNMURKWQ43CCO7","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"FVTNMURK","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:edb3219eedcdadd0e9407637e19a574f47572ae6b2569cc1223e1f78e3b7424d","target":"graph","created_at":"2026-05-18T01:07:37Z","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":"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","authors_text":"D.A. Roberts, F. Yusef-Zadeh, J. Biretta","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-03-19T18:14:26Z","title":"Proper Motions of Ionized Gas at the Galactic Center: Evidence for Unbound Orbiting Gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9803231","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":"sha256:2a9a10b836e7a1e8a25022d98ed9d6d8ca86856b829a8bb7e84b776cace2f966","target":"record","created_at":"2026-05-18T01:07:37Z","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":"b97d89c4df988307c2cbbd816d7c7548d87cdd686c39f9344445de92c3540d0a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-03-19T18:14:26Z","title_canon_sha256":"fea31adc29758777ac26187874cc92f182673f5ede96784de23902655a240d57"},"schema_version":"1.0","source":{"id":"astro-ph/9803231","kind":"arxiv","version":1}},"canonical_sha256":"2d66d6522ab439b109dfa345a1296d3ee8741a72b7794236c53c82556d2bbfb1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d66d6522ab439b109dfa345a1296d3ee8741a72b7794236c53c82556d2bbfb1","first_computed_at":"2026-05-18T01:07:37.713491Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:37.713491Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wItSwEzz1qRcG9JOHj7uLedHuE3YVwsWik8+/J6A9EWnpZLpL6+K45sC3R3MFwJ5G+Pn12XEMY2bpMO25poDAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:37.714140Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9803231","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a9a10b836e7a1e8a25022d98ed9d6d8ca86856b829a8bb7e84b776cace2f966","sha256:edb3219eedcdadd0e9407637e19a574f47572ae6b2569cc1223e1f78e3b7424d"],"state_sha256":"f4787c4641256553f820aa9d7b2e5884fb0de7171d019590a6575af5fc8f8f43"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GqtEO+IkbERZhNe7Vh7zweukApb/rqFCd+QEA2BVFa+sAm3T5AGBXaCEZmqbnBgnmMwVqxVsMAMyuzquW5jxBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T01:25:51.475102Z","bundle_sha256":"51295e6fe7c5025e90a0c7fc8f56406fc437775eabdaa4f5a76d3656cbf15b34"}}