{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:NCGXVEQUHQKNGOFFVHMXLDZBTX","short_pith_number":"pith:NCGXVEQU","canonical_record":{"source":{"id":"1201.4684","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-01-23T11:10:12Z","cross_cats_sorted":[],"title_canon_sha256":"d1d142fb139f217bf394f95b29e253ca11cff0e20c2468e999f3e26978cd9fd9","abstract_canon_sha256":"889afd9eb43d857f330bf6bbc151731691497a1aea867740324888c80d854675"},"schema_version":"1.0"},"canonical_sha256":"688d7a92143c14d338a5a9d9758f219dfc849b603dfc30b59ff9f17a8235885c","source":{"kind":"arxiv","id":"1201.4684","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.4684","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"arxiv_version","alias_value":"1201.4684v2","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.4684","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"pith_short_12","alias_value":"NCGXVEQUHQKN","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"NCGXVEQUHQKNGOFF","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"NCGXVEQU","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:NCGXVEQUHQKNGOFFVHMXLDZBTX","target":"record","payload":{"canonical_record":{"source":{"id":"1201.4684","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-01-23T11:10:12Z","cross_cats_sorted":[],"title_canon_sha256":"d1d142fb139f217bf394f95b29e253ca11cff0e20c2468e999f3e26978cd9fd9","abstract_canon_sha256":"889afd9eb43d857f330bf6bbc151731691497a1aea867740324888c80d854675"},"schema_version":"1.0"},"canonical_sha256":"688d7a92143c14d338a5a9d9758f219dfc849b603dfc30b59ff9f17a8235885c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:43.584741Z","signature_b64":"wjA2c79Tf0eRIVwe87Cq5nbkeo5MlTaDqg4v7lTXOTRG7a9Pw4ZFxPY4sKqaKf8bqrnpoU6I2OQ549H0fESpBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"688d7a92143c14d338a5a9d9758f219dfc849b603dfc30b59ff9f17a8235885c","last_reissued_at":"2026-05-18T01:58:43.583873Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:43.583873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.4684","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h+lBCAn2ZZevqgBQM2yIiVu0voagw8RVWsVPXrZT8eBsKHqvstq5PJ41Mc0//udK0f7MdBfD58rI1S8iinH8BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:11:38.039907Z"},"content_sha256":"15446f02b4dc8c4f3d930f58df2030be622246d51074e2bf208975d283d4d7d3","schema_version":"1.0","event_id":"sha256:15446f02b4dc8c4f3d930f58df2030be622246d51074e2bf208975d283d4d7d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:NCGXVEQUHQKNGOFFVHMXLDZBTX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The proper motion of PSR J1550-5418 measured with VLBI: a second magnetar velocity measurement","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. T. Deller, F. Camilo, J. E. Reynolds, J. P. Halpern","submitted_at":"2012-01-23T11:10:12Z","abstract_excerpt":"The formation mechanism of neutron stars with extremely large magnetic field strengths (magnetars) remains unclear. Some formation scenarios predict that magnetars should be born with extremely high space velocities, >1000 km/s. Using the Long Baseline Array in Australia, we have measured the proper motion of the intermittently radio-bright magnetar J1550-5418 (1E 1547.0-5408) to be 9.2 +/- 0.6 mas/yr. For a likely distance of 6 +/- 2 kpc, the implied transverse velocity is 280 + 130 - 120 km/s after correcting for Galactic rotation. Along with the ~200 km/s transverse velocity measured for th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.4684","kind":"arxiv","version":2},"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":"2026-05-18T01:58:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dHv59Oukh5h0MzEG9ebuDWsIxSKXMA3nUeU8YFbQb7iGfg5WbPdWNg4+T+H9V7XUmkNc9ce+RQFEKsz8XGciCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:11:38.040802Z"},"content_sha256":"1a691d1ef1a75935ac2898d602e0b42c770f0d2faef7e95a55c0ef17d9bebe36","schema_version":"1.0","event_id":"sha256:1a691d1ef1a75935ac2898d602e0b42c770f0d2faef7e95a55c0ef17d9bebe36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NCGXVEQUHQKNGOFFVHMXLDZBTX/bundle.json","state_url":"https://pith.science/pith/NCGXVEQUHQKNGOFFVHMXLDZBTX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NCGXVEQUHQKNGOFFVHMXLDZBTX/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":"2026-05-30T11:11:38Z","links":{"resolver":"https://pith.science/pith/NCGXVEQUHQKNGOFFVHMXLDZBTX","bundle":"https://pith.science/pith/NCGXVEQUHQKNGOFFVHMXLDZBTX/bundle.json","state":"https://pith.science/pith/NCGXVEQUHQKNGOFFVHMXLDZBTX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NCGXVEQUHQKNGOFFVHMXLDZBTX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:NCGXVEQUHQKNGOFFVHMXLDZBTX","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":"889afd9eb43d857f330bf6bbc151731691497a1aea867740324888c80d854675","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-01-23T11:10:12Z","title_canon_sha256":"d1d142fb139f217bf394f95b29e253ca11cff0e20c2468e999f3e26978cd9fd9"},"schema_version":"1.0","source":{"id":"1201.4684","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.4684","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"arxiv_version","alias_value":"1201.4684v2","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.4684","created_at":"2026-05-18T01:58:43Z"},{"alias_kind":"pith_short_12","alias_value":"NCGXVEQUHQKN","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"NCGXVEQUHQKNGOFF","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"NCGXVEQU","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:1a691d1ef1a75935ac2898d602e0b42c770f0d2faef7e95a55c0ef17d9bebe36","target":"graph","created_at":"2026-05-18T01:58:43Z","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":"The formation mechanism of neutron stars with extremely large magnetic field strengths (magnetars) remains unclear. Some formation scenarios predict that magnetars should be born with extremely high space velocities, >1000 km/s. Using the Long Baseline Array in Australia, we have measured the proper motion of the intermittently radio-bright magnetar J1550-5418 (1E 1547.0-5408) to be 9.2 +/- 0.6 mas/yr. For a likely distance of 6 +/- 2 kpc, the implied transverse velocity is 280 + 130 - 120 km/s after correcting for Galactic rotation. Along with the ~200 km/s transverse velocity measured for th","authors_text":"A. T. Deller, F. Camilo, J. E. Reynolds, J. P. Halpern","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-01-23T11:10:12Z","title":"The proper motion of PSR J1550-5418 measured with VLBI: a second magnetar velocity measurement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.4684","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":"sha256:15446f02b4dc8c4f3d930f58df2030be622246d51074e2bf208975d283d4d7d3","target":"record","created_at":"2026-05-18T01:58:43Z","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":"889afd9eb43d857f330bf6bbc151731691497a1aea867740324888c80d854675","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-01-23T11:10:12Z","title_canon_sha256":"d1d142fb139f217bf394f95b29e253ca11cff0e20c2468e999f3e26978cd9fd9"},"schema_version":"1.0","source":{"id":"1201.4684","kind":"arxiv","version":2}},"canonical_sha256":"688d7a92143c14d338a5a9d9758f219dfc849b603dfc30b59ff9f17a8235885c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"688d7a92143c14d338a5a9d9758f219dfc849b603dfc30b59ff9f17a8235885c","first_computed_at":"2026-05-18T01:58:43.583873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:43.583873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wjA2c79Tf0eRIVwe87Cq5nbkeo5MlTaDqg4v7lTXOTRG7a9Pw4ZFxPY4sKqaKf8bqrnpoU6I2OQ549H0fESpBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:43.584741Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.4684","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:15446f02b4dc8c4f3d930f58df2030be622246d51074e2bf208975d283d4d7d3","sha256:1a691d1ef1a75935ac2898d602e0b42c770f0d2faef7e95a55c0ef17d9bebe36"],"state_sha256":"5016e3b9dba773fafb1cf6152dcbf9c2fb9f8e03e1beb61cf7acca8a7981cb61"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5HPs9vYjzVSIqGi9kDKxMvX1a0YJJsAd4QnWQVoQK6BJ+jaz6miH7YkDgkcZtHsq3lbKuF9QTgV6hFPRFv91AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T11:11:38.045805Z","bundle_sha256":"72898409f5b231a7fe4b49585e1b3295bbbaf63d32a6b80505baf83dd3f0ca15"}}