{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:U2JF4BRWOKOTEXMAN7PJXGPJV6","short_pith_number":"pith:U2JF4BRW","canonical_record":{"source":{"id":"2002.01367","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-02-04T15:30:46Z","cross_cats_sorted":[],"title_canon_sha256":"5683ebe453eeca4066d30063a89c8eb8384bb761b7787bb53c340267ab676827","abstract_canon_sha256":"48be035addfe41ba5696197ea29bb480c757a0e86ab906bca0b54555877bb3e3"},"schema_version":"1.0"},"canonical_sha256":"a6925e0636729d325d806fde9b99e9af80fdb297eaf535dd99c6dde6628a8723","source":{"kind":"arxiv","id":"2002.01367","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.01367","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"arxiv_version","alias_value":"2002.01367v2","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.01367","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"pith_short_12","alias_value":"U2JF4BRWOKOT","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"pith_short_16","alias_value":"U2JF4BRWOKOTEXMA","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"pith_short_8","alias_value":"U2JF4BRW","created_at":"2026-07-05T00:52:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:U2JF4BRWOKOTEXMAN7PJXGPJV6","target":"record","payload":{"canonical_record":{"source":{"id":"2002.01367","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-02-04T15:30:46Z","cross_cats_sorted":[],"title_canon_sha256":"5683ebe453eeca4066d30063a89c8eb8384bb761b7787bb53c340267ab676827","abstract_canon_sha256":"48be035addfe41ba5696197ea29bb480c757a0e86ab906bca0b54555877bb3e3"},"schema_version":"1.0"},"canonical_sha256":"a6925e0636729d325d806fde9b99e9af80fdb297eaf535dd99c6dde6628a8723","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:52:52.247242Z","signature_b64":"EuidSzus/rP/CbVQc2LNpZWR3xZWfRoN+DVn30K16kx/1AhNTtA/d34NrcjhZVbSvxQn8RV7hBiAodxuTqDLDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6925e0636729d325d806fde9b99e9af80fdb297eaf535dd99c6dde6628a8723","last_reissued_at":"2026-07-05T00:52:52.246876Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:52:52.246876Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.01367","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":"2026-07-05T00:52:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HoEvBvmfWyTgojrUJhYdi4GLt2bJiOZZ5y+IWbcQ0GDzJE/vb/VYmJA8x4Yy7l5ICAh8vbPBz+TuMfqYRPIZAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:18:56.523299Z"},"content_sha256":"717650ad7be8db82c12c293e886b9e4ad5675cc8fe0bf708897d12e7fd8f7f37","schema_version":"1.0","event_id":"sha256:717650ad7be8db82c12c293e886b9e4ad5675cc8fe0bf708897d12e7fd8f7f37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:U2JF4BRWOKOTEXMAN7PJXGPJV6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The observed velocity distribution of young pulsars II: analysis of complete PSR$\\pi$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Andrei P. Igoshev","submitted_at":"2020-02-04T15:30:46Z","abstract_excerpt":"Understanding the natal kicks, or birth velocities, of neutron stars are essential for understanding the evolution of massive binaries as well as double neutron star formation. We use maximum likelihood methods as published in Verbunt et al. to analyse a new large dataset of parallaxes and proper motions measured by Deller et al. This sample is roughly three times larger than number of measurements available before. For both the complete sample and its younger part (spin-down ages $\\tau < 3$ Myr), we find that a bimodal Maxwellian distribution describes the measured parallaxes and proper motio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.01367","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.01367/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:52:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fk/gNCQQ83sJhvsy1t+gPiPwsDnMrhfl5KQV7tU610plUGX+XKzt2f0IwBv9gqjpU8YJUtQpRigSlPqW29EjAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:18:56.523832Z"},"content_sha256":"4de8c9c2894eeb34228ea6169eb92dba175afcf461a8eb5b6d6cefc4631fd102","schema_version":"1.0","event_id":"sha256:4de8c9c2894eeb34228ea6169eb92dba175afcf461a8eb5b6d6cefc4631fd102"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U2JF4BRWOKOTEXMAN7PJXGPJV6/bundle.json","state_url":"https://pith.science/pith/U2JF4BRWOKOTEXMAN7PJXGPJV6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U2JF4BRWOKOTEXMAN7PJXGPJV6/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":"2026-08-05T17:18:56Z","links":{"resolver":"https://pith.science/pith/U2JF4BRWOKOTEXMAN7PJXGPJV6","bundle":"https://pith.science/pith/U2JF4BRWOKOTEXMAN7PJXGPJV6/bundle.json","state":"https://pith.science/pith/U2JF4BRWOKOTEXMAN7PJXGPJV6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U2JF4BRWOKOTEXMAN7PJXGPJV6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:U2JF4BRWOKOTEXMAN7PJXGPJV6","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":"48be035addfe41ba5696197ea29bb480c757a0e86ab906bca0b54555877bb3e3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-02-04T15:30:46Z","title_canon_sha256":"5683ebe453eeca4066d30063a89c8eb8384bb761b7787bb53c340267ab676827"},"schema_version":"1.0","source":{"id":"2002.01367","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.01367","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"arxiv_version","alias_value":"2002.01367v2","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.01367","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"pith_short_12","alias_value":"U2JF4BRWOKOT","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"pith_short_16","alias_value":"U2JF4BRWOKOTEXMA","created_at":"2026-07-05T00:52:52Z"},{"alias_kind":"pith_short_8","alias_value":"U2JF4BRW","created_at":"2026-07-05T00:52:52Z"}],"graph_snapshots":[{"event_id":"sha256:4de8c9c2894eeb34228ea6169eb92dba175afcf461a8eb5b6d6cefc4631fd102","target":"graph","created_at":"2026-07-05T00:52:52Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2002.01367/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Understanding the natal kicks, or birth velocities, of neutron stars are essential for understanding the evolution of massive binaries as well as double neutron star formation. We use maximum likelihood methods as published in Verbunt et al. to analyse a new large dataset of parallaxes and proper motions measured by Deller et al. This sample is roughly three times larger than number of measurements available before. For both the complete sample and its younger part (spin-down ages $\\tau < 3$ Myr), we find that a bimodal Maxwellian distribution describes the measured parallaxes and proper motio","authors_text":"Andrei P. Igoshev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-02-04T15:30:46Z","title":"The observed velocity distribution of young pulsars II: analysis of complete PSR$\\pi$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.01367","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":"sha256:717650ad7be8db82c12c293e886b9e4ad5675cc8fe0bf708897d12e7fd8f7f37","target":"record","created_at":"2026-07-05T00:52:52Z","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":"48be035addfe41ba5696197ea29bb480c757a0e86ab906bca0b54555877bb3e3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-02-04T15:30:46Z","title_canon_sha256":"5683ebe453eeca4066d30063a89c8eb8384bb761b7787bb53c340267ab676827"},"schema_version":"1.0","source":{"id":"2002.01367","kind":"arxiv","version":2}},"canonical_sha256":"a6925e0636729d325d806fde9b99e9af80fdb297eaf535dd99c6dde6628a8723","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6925e0636729d325d806fde9b99e9af80fdb297eaf535dd99c6dde6628a8723","first_computed_at":"2026-07-05T00:52:52.246876Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:52:52.246876Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EuidSzus/rP/CbVQc2LNpZWR3xZWfRoN+DVn30K16kx/1AhNTtA/d34NrcjhZVbSvxQn8RV7hBiAodxuTqDLDw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:52:52.247242Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.01367","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:717650ad7be8db82c12c293e886b9e4ad5675cc8fe0bf708897d12e7fd8f7f37","sha256:4de8c9c2894eeb34228ea6169eb92dba175afcf461a8eb5b6d6cefc4631fd102"],"state_sha256":"e49475327552bcf099358ca566c8595716778efbfd0c0a33558e08c9d1d1a53d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TEQYQ+ES5aFTUVBnQ0JRO3m2ql5gKd/l3xbxlV4jmwx3vxod8pHwQG+06q5y++rheQ8r2VwGNSG4Jf+bQ4gtBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T17:18:56.527864Z","bundle_sha256":"00922eee9535b43a1081eed677cb0199b62ec6856128215a71fa83987582ffbd"}}