{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:OPD3K5PBSVVMLZZJMXDQYCKSZ4","short_pith_number":"pith:OPD3K5PB","canonical_record":{"source":{"id":"1406.5173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-06-19T19:57:56Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"689aca1b8edb944591e02784fee8ba5441585dccf42980744ebedf1d05a5d156","abstract_canon_sha256":"8b717fdab25fa50e0438f48bd3ca1b42f7088723cac423e3387730c7051b6662"},"schema_version":"1.0"},"canonical_sha256":"73c7b575e1956ac5e72965c70c0952cf1c5cab7237d81029dbb284f44a294c76","source":{"kind":"arxiv","id":"1406.5173","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.5173","created_at":"2026-05-18T01:42:52Z"},{"alias_kind":"arxiv_version","alias_value":"1406.5173v1","created_at":"2026-05-18T01:42:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.5173","created_at":"2026-05-18T01:42:52Z"},{"alias_kind":"pith_short_12","alias_value":"OPD3K5PBSVVM","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"OPD3K5PBSVVMLZZJ","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"OPD3K5PB","created_at":"2026-05-18T12:28:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:OPD3K5PBSVVMLZZJMXDQYCKSZ4","target":"record","payload":{"canonical_record":{"source":{"id":"1406.5173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-06-19T19:57:56Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"689aca1b8edb944591e02784fee8ba5441585dccf42980744ebedf1d05a5d156","abstract_canon_sha256":"8b717fdab25fa50e0438f48bd3ca1b42f7088723cac423e3387730c7051b6662"},"schema_version":"1.0"},"canonical_sha256":"73c7b575e1956ac5e72965c70c0952cf1c5cab7237d81029dbb284f44a294c76","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:52.851081Z","signature_b64":"uOXDBhTRyIz4alL2wlaHvt1CrPXsTN6sUSkHJWFadVaSh3N1fcEXNDzS8ZUx7FWpTiG2y+BYuetL6Y/Bi7tDBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73c7b575e1956ac5e72965c70c0952cf1c5cab7237d81029dbb284f44a294c76","last_reissued_at":"2026-05-18T01:42:52.850527Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:52.850527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.5173","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":"2026-05-18T01:42:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/20KwCMDPSNnvvEPHCz4KFGH0ZBVn+7NydIgRCbXwb9xKS0oAHq7pArKDD7+Q/XJvqcsmsNxajbH1L5nuFl7AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:21:20.665750Z"},"content_sha256":"bc8875bf1f585b12885d462f48187754e100def56559471312b8d195c420b214","schema_version":"1.0","event_id":"sha256:bc8875bf1f585b12885d462f48187754e100def56559471312b8d195c420b214"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:OPD3K5PBSVVMLZZJMXDQYCKSZ4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"White Dwarf Cosmochronology in the Solar Neighborhood","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"D. R. Soderblom, J. Cummings, J. S. Kalirai, M. Cignoni, P.-E. Tremblay","submitted_at":"2014-06-19T19:57:56Z","abstract_excerpt":"The study of the stellar formation history in the solar neighborhood is a powerful technique to recover information about the early stages and evolution of the Milky Way. We present a new method which consists of directly probing the formation history from the nearby stellar remnants. We rely on the volume complete sample of white dwarfs within 20 pc, where accurate cooling ages and masses have been determined. The well characterized initial-final mass relation is employed in order to recover the initial masses (1 < M/Msun < 8) and total ages for the local degenerate sample. We correct for mod"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.5173","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":"2026-05-18T01:42:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JAca2G+ADoraa9cunzOTG/5r8fKQP9Ithz6Mwwi2blu5sVFtJXhDN4dF2LRqnkGGnDSihfii7qMVQrl+EgWhCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:21:20.666207Z"},"content_sha256":"2c5468683c6e4822513f34bfcb56e3ea92e0338e202796324f8ac2b37321d931","schema_version":"1.0","event_id":"sha256:2c5468683c6e4822513f34bfcb56e3ea92e0338e202796324f8ac2b37321d931"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OPD3K5PBSVVMLZZJMXDQYCKSZ4/bundle.json","state_url":"https://pith.science/pith/OPD3K5PBSVVMLZZJMXDQYCKSZ4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OPD3K5PBSVVMLZZJMXDQYCKSZ4/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":"2026-08-07T06:21:20Z","links":{"resolver":"https://pith.science/pith/OPD3K5PBSVVMLZZJMXDQYCKSZ4","bundle":"https://pith.science/pith/OPD3K5PBSVVMLZZJMXDQYCKSZ4/bundle.json","state":"https://pith.science/pith/OPD3K5PBSVVMLZZJMXDQYCKSZ4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OPD3K5PBSVVMLZZJMXDQYCKSZ4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:OPD3K5PBSVVMLZZJMXDQYCKSZ4","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":"8b717fdab25fa50e0438f48bd3ca1b42f7088723cac423e3387730c7051b6662","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-06-19T19:57:56Z","title_canon_sha256":"689aca1b8edb944591e02784fee8ba5441585dccf42980744ebedf1d05a5d156"},"schema_version":"1.0","source":{"id":"1406.5173","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.5173","created_at":"2026-05-18T01:42:52Z"},{"alias_kind":"arxiv_version","alias_value":"1406.5173v1","created_at":"2026-05-18T01:42:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.5173","created_at":"2026-05-18T01:42:52Z"},{"alias_kind":"pith_short_12","alias_value":"OPD3K5PBSVVM","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"OPD3K5PBSVVMLZZJ","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"OPD3K5PB","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:2c5468683c6e4822513f34bfcb56e3ea92e0338e202796324f8ac2b37321d931","target":"graph","created_at":"2026-05-18T01:42:52Z","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"},"paper":{"abstract_excerpt":"The study of the stellar formation history in the solar neighborhood is a powerful technique to recover information about the early stages and evolution of the Milky Way. We present a new method which consists of directly probing the formation history from the nearby stellar remnants. We rely on the volume complete sample of white dwarfs within 20 pc, where accurate cooling ages and masses have been determined. The well characterized initial-final mass relation is employed in order to recover the initial masses (1 < M/Msun < 8) and total ages for the local degenerate sample. We correct for mod","authors_text":"D. R. Soderblom, J. Cummings, J. S. Kalirai, M. Cignoni, P.-E. Tremblay","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-06-19T19:57:56Z","title":"White Dwarf Cosmochronology in the Solar Neighborhood"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.5173","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:bc8875bf1f585b12885d462f48187754e100def56559471312b8d195c420b214","target":"record","created_at":"2026-05-18T01:42:52Z","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":"8b717fdab25fa50e0438f48bd3ca1b42f7088723cac423e3387730c7051b6662","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-06-19T19:57:56Z","title_canon_sha256":"689aca1b8edb944591e02784fee8ba5441585dccf42980744ebedf1d05a5d156"},"schema_version":"1.0","source":{"id":"1406.5173","kind":"arxiv","version":1}},"canonical_sha256":"73c7b575e1956ac5e72965c70c0952cf1c5cab7237d81029dbb284f44a294c76","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73c7b575e1956ac5e72965c70c0952cf1c5cab7237d81029dbb284f44a294c76","first_computed_at":"2026-05-18T01:42:52.850527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:52.850527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uOXDBhTRyIz4alL2wlaHvt1CrPXsTN6sUSkHJWFadVaSh3N1fcEXNDzS8ZUx7FWpTiG2y+BYuetL6Y/Bi7tDBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:52.851081Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.5173","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bc8875bf1f585b12885d462f48187754e100def56559471312b8d195c420b214","sha256:2c5468683c6e4822513f34bfcb56e3ea92e0338e202796324f8ac2b37321d931"],"state_sha256":"3a45530922a29906506fd25946c589538e2ddee17b467480cea3507cd0505dae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xo7rS3WmokpR9wRC1HE2hr66W+40yn6kvI/sAwy8YSm310MjmLV35ATztx3fn9YT2p0bhT3lBJn/HTT4Rn/IAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T06:21:20.669749Z","bundle_sha256":"2f5740b0d6cb02c5dd985d5174d5ebd2079f4bce0dc12bd650ea1612746ab861"}}