{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:NIT753LS7VQPWAPNEBCEBHXW5I","short_pith_number":"pith:NIT753LS","canonical_record":{"source":{"id":"0910.1288","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-07T15:30:28Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"52433fdb4b54878aac9025d8cdd382f67949c4fe07ad3a88f7db962992d52d6a","abstract_canon_sha256":"fde1f390a9f5bfa73e15b5ed14242b36985fdc283bbb897ba58feafe667c39c3"},"schema_version":"1.0"},"canonical_sha256":"6a27feed72fd60fb01ed2044409ef6ea1c5a8041aaa7b2fc44640d711ced4a60","source":{"kind":"arxiv","id":"0910.1288","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.1288","created_at":"2026-05-18T02:11:25Z"},{"alias_kind":"arxiv_version","alias_value":"0910.1288v2","created_at":"2026-05-18T02:11:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.1288","created_at":"2026-05-18T02:11:25Z"},{"alias_kind":"pith_short_12","alias_value":"NIT753LS7VQP","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"NIT753LS7VQPWAPN","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"NIT753LS","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:NIT753LS7VQPWAPNEBCEBHXW5I","target":"record","payload":{"canonical_record":{"source":{"id":"0910.1288","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-07T15:30:28Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"52433fdb4b54878aac9025d8cdd382f67949c4fe07ad3a88f7db962992d52d6a","abstract_canon_sha256":"fde1f390a9f5bfa73e15b5ed14242b36985fdc283bbb897ba58feafe667c39c3"},"schema_version":"1.0"},"canonical_sha256":"6a27feed72fd60fb01ed2044409ef6ea1c5a8041aaa7b2fc44640d711ced4a60","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:25.809191Z","signature_b64":"o4QxAU6iaqa7ZIop1nQCDivdkvR1zZnmt0kW1dpKdcPvyAVKEnDqm6Pjjm2y2F7DZz0Ltug/SP+JUgOU+7FVCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a27feed72fd60fb01ed2044409ef6ea1c5a8041aaa7b2fc44640d711ced4a60","last_reissued_at":"2026-05-18T02:11:25.808590Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:25.808590Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.1288","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":"2026-05-18T02:11:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BabAfmN/EEakSORGyj7xvwfm7IMl8dyzdq7+huOPWznnSJXOm8m8uNg26noRzBvXZ+0Nig22yYACSXPrHdsoDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T05:36:41.743743Z"},"content_sha256":"22bda9894f861e8465823b4882456325f92e37ef9a88c2b81fcf99f9e2a11db7","schema_version":"1.0","event_id":"sha256:22bda9894f861e8465823b4882456325f92e37ef9a88c2b81fcf99f9e2a11db7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:NIT753LS7VQPWAPNEBCEBHXW5I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Edward M. Sion, George P. McCook, Jay B. Holberg, Richard Wasatonic, Terry D. Oswalt","submitted_at":"2009-10-07T15:30:28Z","abstract_excerpt":"We present the kinematical properties, distribution of spectroscopic subtypes, stellar population subcomponents of the white dwarfs within 20 pc of the sun. We find no convincing evidence of halo white dwarfs in the total 20 pc sample of 129 white dwarfs nor is there convincing evidence of genuine thick disk subcomponent members within 20 parsecs. Virtually the entire 20 pc sample likely belongs to the thin disk. The total DA to non-DA ratio of the 20 pc sample is 1.6, a manifestation of deepening envelope convection which transforms DA stars with sufficiently thin H surface layers into non-DA"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.1288","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":"2026-05-18T02:11:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YvaIfmy7cL01Njr7vcPiLOy3qexZAi9kEE24JfzKnV8OoyzikjPYrKQ2MbVuXV2zHuH4CzarmUxyE3L2gWumDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T05:36:41.744088Z"},"content_sha256":"663c8c5ba9b78c8710365851bfa6080d3a7343d75e2045216ddcc1811e106c57","schema_version":"1.0","event_id":"sha256:663c8c5ba9b78c8710365851bfa6080d3a7343d75e2045216ddcc1811e106c57"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NIT753LS7VQPWAPNEBCEBHXW5I/bundle.json","state_url":"https://pith.science/pith/NIT753LS7VQPWAPNEBCEBHXW5I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NIT753LS7VQPWAPNEBCEBHXW5I/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":"2026-06-24T05:36:41Z","links":{"resolver":"https://pith.science/pith/NIT753LS7VQPWAPNEBCEBHXW5I","bundle":"https://pith.science/pith/NIT753LS7VQPWAPNEBCEBHXW5I/bundle.json","state":"https://pith.science/pith/NIT753LS7VQPWAPNEBCEBHXW5I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NIT753LS7VQPWAPNEBCEBHXW5I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:NIT753LS7VQPWAPNEBCEBHXW5I","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":"fde1f390a9f5bfa73e15b5ed14242b36985fdc283bbb897ba58feafe667c39c3","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-07T15:30:28Z","title_canon_sha256":"52433fdb4b54878aac9025d8cdd382f67949c4fe07ad3a88f7db962992d52d6a"},"schema_version":"1.0","source":{"id":"0910.1288","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.1288","created_at":"2026-05-18T02:11:25Z"},{"alias_kind":"arxiv_version","alias_value":"0910.1288v2","created_at":"2026-05-18T02:11:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.1288","created_at":"2026-05-18T02:11:25Z"},{"alias_kind":"pith_short_12","alias_value":"NIT753LS7VQP","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"NIT753LS7VQPWAPN","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"NIT753LS","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:663c8c5ba9b78c8710365851bfa6080d3a7343d75e2045216ddcc1811e106c57","target":"graph","created_at":"2026-05-18T02:11:25Z","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 the kinematical properties, distribution of spectroscopic subtypes, stellar population subcomponents of the white dwarfs within 20 pc of the sun. We find no convincing evidence of halo white dwarfs in the total 20 pc sample of 129 white dwarfs nor is there convincing evidence of genuine thick disk subcomponent members within 20 parsecs. Virtually the entire 20 pc sample likely belongs to the thin disk. The total DA to non-DA ratio of the 20 pc sample is 1.6, a manifestation of deepening envelope convection which transforms DA stars with sufficiently thin H surface layers into non-DA","authors_text":"Edward M. Sion, George P. McCook, Jay B. Holberg, Richard Wasatonic, Terry D. Oswalt","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-07T15:30:28Z","title":"The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.1288","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":"sha256:22bda9894f861e8465823b4882456325f92e37ef9a88c2b81fcf99f9e2a11db7","target":"record","created_at":"2026-05-18T02:11:25Z","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":"fde1f390a9f5bfa73e15b5ed14242b36985fdc283bbb897ba58feafe667c39c3","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-07T15:30:28Z","title_canon_sha256":"52433fdb4b54878aac9025d8cdd382f67949c4fe07ad3a88f7db962992d52d6a"},"schema_version":"1.0","source":{"id":"0910.1288","kind":"arxiv","version":2}},"canonical_sha256":"6a27feed72fd60fb01ed2044409ef6ea1c5a8041aaa7b2fc44640d711ced4a60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a27feed72fd60fb01ed2044409ef6ea1c5a8041aaa7b2fc44640d711ced4a60","first_computed_at":"2026-05-18T02:11:25.808590Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:25.808590Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o4QxAU6iaqa7ZIop1nQCDivdkvR1zZnmt0kW1dpKdcPvyAVKEnDqm6Pjjm2y2F7DZz0Ltug/SP+JUgOU+7FVCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:25.809191Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.1288","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:22bda9894f861e8465823b4882456325f92e37ef9a88c2b81fcf99f9e2a11db7","sha256:663c8c5ba9b78c8710365851bfa6080d3a7343d75e2045216ddcc1811e106c57"],"state_sha256":"80768527c8eb10aff647c37c92114c2a93f5cc476f1bf8848c0c8bd334545a47"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pcAaTHmJn0/nCZtlSVpalY23plSw5jLORVFNnRNc66l66p0lgg351+k7oVxuxMk/ywKTorLZcrhUmPVBHw+lAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T05:36:41.746107Z","bundle_sha256":"86c7c4f8c0037d782048317b850db45cd744c8f2ba709541f72a227a6488676b"}}