{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:MX2PARD7UZDXJGGVCSRHDV7ZF4","short_pith_number":"pith:MX2PARD7","canonical_record":{"source":{"id":"0906.3897","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-21T20:54:42Z","cross_cats_sorted":[],"title_canon_sha256":"507ecece8f684c947a16a15ae5baec992e293e82eaf6f0f96260d25c3c83f73b","abstract_canon_sha256":"e4a7c982a3c0829ffd530b7081bccf0b801a2ff99c4a44a89a53fd7beab7f8a8"},"schema_version":"1.0"},"canonical_sha256":"65f4f0447fa6477498d514a271d7f92f08f6434116822a761a9c85d2dc3a1635","source":{"kind":"arxiv","id":"0906.3897","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3897","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3897v1","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3897","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"pith_short_12","alias_value":"MX2PARD7UZDX","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MX2PARD7UZDXJGGV","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MX2PARD7","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:MX2PARD7UZDXJGGVCSRHDV7ZF4","target":"record","payload":{"canonical_record":{"source":{"id":"0906.3897","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-21T20:54:42Z","cross_cats_sorted":[],"title_canon_sha256":"507ecece8f684c947a16a15ae5baec992e293e82eaf6f0f96260d25c3c83f73b","abstract_canon_sha256":"e4a7c982a3c0829ffd530b7081bccf0b801a2ff99c4a44a89a53fd7beab7f8a8"},"schema_version":"1.0"},"canonical_sha256":"65f4f0447fa6477498d514a271d7f92f08f6434116822a761a9c85d2dc3a1635","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:42.643070Z","signature_b64":"1bRi2AWeBNOQcFvqn+eNTSyOdK5jmU2ulQFdZ+Jt4MgOMaxCz2NyxreQMWhCzrsOylq64jcB0yCYil7vJORGCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65f4f0447fa6477498d514a271d7f92f08f6434116822a761a9c85d2dc3a1635","last_reissued_at":"2026-05-18T04:29:42.642667Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:42.642667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.3897","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":"2026-05-18T04:29:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0vk15NA7L5jPbCUJiHT0OCvQRtcXjCOk1owyezusDi2SrlHBxVYf4hPnA/1eHCXF9UIR6ZnLTPY5PU0aqxWxDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T22:38:12.665489Z"},"content_sha256":"ef5e1e9b339219d6e3357273300110324d7929821e8b1576f85e002e724d6b3b","schema_version":"1.0","event_id":"sha256:ef5e1e9b339219d6e3357273300110324d7929821e8b1576f85e002e724d6b3b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:MX2PARD7UZDXJGGVCSRHDV7ZF4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Precision southern hemisphere VLBI pulsar astrometry II: Measurement of seven parallaxes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. T. Deller, J. E. Reynolds, M. Bailes, S. J. Tingay","submitted_at":"2009-06-21T20:54:42Z","abstract_excerpt":"Accurate measurement of pulsar distances via astrometry using very long baseline interferometry enables the improvement of Galactic electron density distribution models, improving distance estimates for the vast majority of pulsars for which parallax measurements are unavailable. However, pulsars at southern declinations have been under-represented in previous interferometric astrometry campaigns. In order to redress this imbalance, we have conducted a two-year astrometric campaign targeting eight southern pulsars with the Australian Long Baseline Array. The program summarized in this paper ha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3897","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":"2026-05-18T04:29:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0TlQi6BDUP4YroPSLbocP9jqI5tl9zrdqMoFUDpVXoDw2LPkgx3kxEJmCi0rabPcydZSsaij2zv1XU/lhLFMDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T22:38:12.665897Z"},"content_sha256":"0042a0f3a644883f4ad312a191d4a8dc8e0138b4d34e115eb84f490202d61929","schema_version":"1.0","event_id":"sha256:0042a0f3a644883f4ad312a191d4a8dc8e0138b4d34e115eb84f490202d61929"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MX2PARD7UZDXJGGVCSRHDV7ZF4/bundle.json","state_url":"https://pith.science/pith/MX2PARD7UZDXJGGVCSRHDV7ZF4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MX2PARD7UZDXJGGVCSRHDV7ZF4/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":"2026-06-11T22:38:12Z","links":{"resolver":"https://pith.science/pith/MX2PARD7UZDXJGGVCSRHDV7ZF4","bundle":"https://pith.science/pith/MX2PARD7UZDXJGGVCSRHDV7ZF4/bundle.json","state":"https://pith.science/pith/MX2PARD7UZDXJGGVCSRHDV7ZF4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MX2PARD7UZDXJGGVCSRHDV7ZF4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:MX2PARD7UZDXJGGVCSRHDV7ZF4","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":"e4a7c982a3c0829ffd530b7081bccf0b801a2ff99c4a44a89a53fd7beab7f8a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-21T20:54:42Z","title_canon_sha256":"507ecece8f684c947a16a15ae5baec992e293e82eaf6f0f96260d25c3c83f73b"},"schema_version":"1.0","source":{"id":"0906.3897","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.3897","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"arxiv_version","alias_value":"0906.3897v1","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.3897","created_at":"2026-05-18T04:29:42Z"},{"alias_kind":"pith_short_12","alias_value":"MX2PARD7UZDX","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MX2PARD7UZDXJGGV","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MX2PARD7","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:0042a0f3a644883f4ad312a191d4a8dc8e0138b4d34e115eb84f490202d61929","target":"graph","created_at":"2026-05-18T04:29:42Z","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":"Accurate measurement of pulsar distances via astrometry using very long baseline interferometry enables the improvement of Galactic electron density distribution models, improving distance estimates for the vast majority of pulsars for which parallax measurements are unavailable. However, pulsars at southern declinations have been under-represented in previous interferometric astrometry campaigns. In order to redress this imbalance, we have conducted a two-year astrometric campaign targeting eight southern pulsars with the Australian Long Baseline Array. The program summarized in this paper ha","authors_text":"A. T. Deller, J. E. Reynolds, M. Bailes, S. J. Tingay","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-21T20:54:42Z","title":"Precision southern hemisphere VLBI pulsar astrometry II: Measurement of seven parallaxes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.3897","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:ef5e1e9b339219d6e3357273300110324d7929821e8b1576f85e002e724d6b3b","target":"record","created_at":"2026-05-18T04:29:42Z","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":"e4a7c982a3c0829ffd530b7081bccf0b801a2ff99c4a44a89a53fd7beab7f8a8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-06-21T20:54:42Z","title_canon_sha256":"507ecece8f684c947a16a15ae5baec992e293e82eaf6f0f96260d25c3c83f73b"},"schema_version":"1.0","source":{"id":"0906.3897","kind":"arxiv","version":1}},"canonical_sha256":"65f4f0447fa6477498d514a271d7f92f08f6434116822a761a9c85d2dc3a1635","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65f4f0447fa6477498d514a271d7f92f08f6434116822a761a9c85d2dc3a1635","first_computed_at":"2026-05-18T04:29:42.642667Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:42.642667Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1bRi2AWeBNOQcFvqn+eNTSyOdK5jmU2ulQFdZ+Jt4MgOMaxCz2NyxreQMWhCzrsOylq64jcB0yCYil7vJORGCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:42.643070Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.3897","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ef5e1e9b339219d6e3357273300110324d7929821e8b1576f85e002e724d6b3b","sha256:0042a0f3a644883f4ad312a191d4a8dc8e0138b4d34e115eb84f490202d61929"],"state_sha256":"4b03d77a232c690cf27285699cc9942e5013a8628c3e84841cd1977f8493ae48"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wlznmnm/5+U6kA1NOBMgx825ln1q4sexj4R06E9Ie9tCOejl/hahxHcvi7Sa0+5xqj6aWxDTIHSByGPOxhovBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T22:38:12.669205Z","bundle_sha256":"cc49abae8b8043419c99d8a781d9862731a91b12e8b90452f74e99e7c5833d1a"}}