{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:RYOTYWG2PTK6HR63FND7VDNLFT","short_pith_number":"pith:RYOTYWG2","canonical_record":{"source":{"id":"astro-ph/0612277","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-11T17:53:43Z","cross_cats_sorted":[],"title_canon_sha256":"758efb190e4bea715a0826b1aeba1b60cdf496e069f4d10c8891aa52d2d5164b","abstract_canon_sha256":"446532e16cf6c762dcd9922da0f546af119b2fdb345e4f64d547a6d59059b253"},"schema_version":"1.0"},"canonical_sha256":"8e1d3c58da7cd5e3c7db2b47fa8dab2cd564b3f99d36feae50defa8e2561a3d4","source":{"kind":"arxiv","id":"astro-ph/0612277","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0612277","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0612277v2","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0612277","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"pith_short_12","alias_value":"RYOTYWG2PTK6","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"pith_short_16","alias_value":"RYOTYWG2PTK6HR63","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"pith_short_8","alias_value":"RYOTYWG2","created_at":"2026-07-04T15:16:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:RYOTYWG2PTK6HR63FND7VDNLFT","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0612277","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-11T17:53:43Z","cross_cats_sorted":[],"title_canon_sha256":"758efb190e4bea715a0826b1aeba1b60cdf496e069f4d10c8891aa52d2d5164b","abstract_canon_sha256":"446532e16cf6c762dcd9922da0f546af119b2fdb345e4f64d547a6d59059b253"},"schema_version":"1.0"},"canonical_sha256":"8e1d3c58da7cd5e3c7db2b47fa8dab2cd564b3f99d36feae50defa8e2561a3d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:16:27.460415Z","signature_b64":"NdGR8UHsqUSn+QK+Zgg3IbnYCgeWH8OhtQqU0dlkVbtPcGTEfg/zpuIJ+96z8+fn59x5xxGwxlGZVgODYK21DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e1d3c58da7cd5e3c7db2b47fa8dab2cd564b3f99d36feae50defa8e2561a3d4","last_reissued_at":"2026-07-04T15:16:27.459897Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:16:27.459897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0612277","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":"2026-07-04T15:16:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zUdO/ZW8RY4eSo4H6ZUOh6CIPOYhUJjymHoAn4OYA3IqbNdCdUVZPVAbCy7/drXgjm7oWWQ4pPlVQZYevP2rBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T01:26:07.404592Z"},"content_sha256":"5489550148449ddab3693d3a7ca82b3d2534d8e28a28c7db15a3d666aeabc3fd","schema_version":"1.0","event_id":"sha256:5489550148449ddab3693d3a7ca82b3d2534d8e28a28c7db15a3d666aeabc3fd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:RYOTYWG2PTK6HR63FND7VDNLFT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"White Dwarf Mass Distribution in the SDSS","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. F. M. Costa, A. Nitta, B. G. Castanheira, D. Koester, L. Althaus, O. Giovannini, S. J. Kleinman, S. O. Kepler","submitted_at":"2006-12-11T17:53:43Z","abstract_excerpt":"We determined masses for the 7167 DA and 507 DB white dwarf stars classified as single and non-magnetic in data release four of the Sloan Digital Sky Survey (SDSS). We obtained revised Teff and log g determinations for the most massive stars by fitting the SDSS optical spectra with a synthetic spectra grid derived from model atmospheres extending to log g=10.0. We also calculate radii from evolutionary models and create volume-corrected mass distributions for our DA and DB samples. The mean mass for the DA stars brighter than g=19 and hotter than Teff=12000K is M(DA)= 0.593+/-0.016M(Sun). For "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0612277","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/astro-ph/0612277/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":"2026-07-04T15:16:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HQbbrUeBODD1gB6jXX2SMufgnIL3kfjVLGgBYlhQdaKDXdM5ntRqhg6wvvoc+gRDZ9sRI/cODHk7Oz2zjbMHCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T01:26:07.404963Z"},"content_sha256":"9ac24708426cd0b7d573d5ca4256603f178ca3ec0cedb2c8061f8a8a30ca64a6","schema_version":"1.0","event_id":"sha256:9ac24708426cd0b7d573d5ca4256603f178ca3ec0cedb2c8061f8a8a30ca64a6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RYOTYWG2PTK6HR63FND7VDNLFT/bundle.json","state_url":"https://pith.science/pith/RYOTYWG2PTK6HR63FND7VDNLFT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RYOTYWG2PTK6HR63FND7VDNLFT/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":"2026-07-05T01:26:07Z","links":{"resolver":"https://pith.science/pith/RYOTYWG2PTK6HR63FND7VDNLFT","bundle":"https://pith.science/pith/RYOTYWG2PTK6HR63FND7VDNLFT/bundle.json","state":"https://pith.science/pith/RYOTYWG2PTK6HR63FND7VDNLFT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RYOTYWG2PTK6HR63FND7VDNLFT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:RYOTYWG2PTK6HR63FND7VDNLFT","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":"446532e16cf6c762dcd9922da0f546af119b2fdb345e4f64d547a6d59059b253","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-11T17:53:43Z","title_canon_sha256":"758efb190e4bea715a0826b1aeba1b60cdf496e069f4d10c8891aa52d2d5164b"},"schema_version":"1.0","source":{"id":"astro-ph/0612277","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0612277","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0612277v2","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0612277","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"pith_short_12","alias_value":"RYOTYWG2PTK6","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"pith_short_16","alias_value":"RYOTYWG2PTK6HR63","created_at":"2026-07-04T15:16:27Z"},{"alias_kind":"pith_short_8","alias_value":"RYOTYWG2","created_at":"2026-07-04T15:16:27Z"}],"graph_snapshots":[{"event_id":"sha256:9ac24708426cd0b7d573d5ca4256603f178ca3ec0cedb2c8061f8a8a30ca64a6","target":"graph","created_at":"2026-07-04T15:16:27Z","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/astro-ph/0612277/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We determined masses for the 7167 DA and 507 DB white dwarf stars classified as single and non-magnetic in data release four of the Sloan Digital Sky Survey (SDSS). We obtained revised Teff and log g determinations for the most massive stars by fitting the SDSS optical spectra with a synthetic spectra grid derived from model atmospheres extending to log g=10.0. We also calculate radii from evolutionary models and create volume-corrected mass distributions for our DA and DB samples. The mean mass for the DA stars brighter than g=19 and hotter than Teff=12000K is M(DA)= 0.593+/-0.016M(Sun). For ","authors_text":"A. F. M. Costa, A. Nitta, B. G. Castanheira, D. Koester, L. Althaus, O. Giovannini, S. J. Kleinman, S. O. Kepler","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-12-11T17:53:43Z","title":"White Dwarf Mass Distribution in the SDSS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0612277","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":"sha256:5489550148449ddab3693d3a7ca82b3d2534d8e28a28c7db15a3d666aeabc3fd","target":"record","created_at":"2026-07-04T15:16:27Z","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":"446532e16cf6c762dcd9922da0f546af119b2fdb345e4f64d547a6d59059b253","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-12-11T17:53:43Z","title_canon_sha256":"758efb190e4bea715a0826b1aeba1b60cdf496e069f4d10c8891aa52d2d5164b"},"schema_version":"1.0","source":{"id":"astro-ph/0612277","kind":"arxiv","version":2}},"canonical_sha256":"8e1d3c58da7cd5e3c7db2b47fa8dab2cd564b3f99d36feae50defa8e2561a3d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e1d3c58da7cd5e3c7db2b47fa8dab2cd564b3f99d36feae50defa8e2561a3d4","first_computed_at":"2026-07-04T15:16:27.459897Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:16:27.459897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NdGR8UHsqUSn+QK+Zgg3IbnYCgeWH8OhtQqU0dlkVbtPcGTEfg/zpuIJ+96z8+fn59x5xxGwxlGZVgODYK21DA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:16:27.460415Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0612277","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5489550148449ddab3693d3a7ca82b3d2534d8e28a28c7db15a3d666aeabc3fd","sha256:9ac24708426cd0b7d573d5ca4256603f178ca3ec0cedb2c8061f8a8a30ca64a6"],"state_sha256":"0cbbeb9433175953d01e9c54f7cfb5b7b8c9b11d53844b1f01372cd1c895d22d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q5QNit5cx8ECoHTq8TrZVkeILBjJnPZCqA/VKeQmWT10FqB3amHwk4RvBs4GSH6GwTUedhQRToGBBrvX6AU+Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T01:26:07.406896Z","bundle_sha256":"a52d64deec6a812d2ecbd28947005519e8d3041cf44824ef2c304b9b4d2e7742"}}