{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:FFNBLCUCSMMDMCQEQ5MGQQB3WQ","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":"7c0b659dbf14ab8b34b0599d03ac0c8558392e315d33b2151dab2c91732ae94e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-02-22T19:00:38Z","title_canon_sha256":"e2a26eae627cdfb9846cbfff6a2492e239b0d1672432a32c23447b72b8162e8a"},"schema_version":"1.0","source":{"id":"2102.11302","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.11302","created_at":"2026-07-05T02:31:53Z"},{"alias_kind":"arxiv_version","alias_value":"2102.11302v1","created_at":"2026-07-05T02:31:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.11302","created_at":"2026-07-05T02:31:53Z"},{"alias_kind":"pith_short_12","alias_value":"FFNBLCUCSMMD","created_at":"2026-07-05T02:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"FFNBLCUCSMMDMCQE","created_at":"2026-07-05T02:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"FFNBLCUC","created_at":"2026-07-05T02:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:48a0939bf63f3ca370b45d5c93ffeeed4bc3acef2bee122619049e023769bb0d","target":"graph","created_at":"2026-07-05T02:31:53Z","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/2102.11302/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Masses of classical Cepheids of 3 to 11 M$\\odot$ are predicted by theory but those measured, clump between 3.6 and 5 M$\\odot$. As a result, their mass-luminosity relation is poorly constrained, impeding our understanding of basic stellar physics and the Leavitt Law. All Cepheid masses come from the analysis of 11 binary systems, including only 5 double-lined and well-suited for accurate dynamical mass determination. We present a project to analyze a new, numerous group of Cepheids in double-lined binary (SB2) systems to provide mass determinations in a wide mass interval and study their evolut","authors_text":"Bogumi{\\l} Pilecki, Grzegorz Pietrzy\\'nski, Jesper Storm, M\\'onica Taormina, Nancy R. Evans, Richard I. Anderson, Weronika Narloch, Wolfgang Gieren","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-02-22T19:00:38Z","title":"Cepheids with giant companions. I. Revealing a numerous population of double-lined binary Cepheids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.11302","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":"sha256:33b4a94919a4ed53087f851ebd1564da92d6c746a57a292a32d67c870cdcb2a2","target":"record","created_at":"2026-07-05T02:31:53Z","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":"7c0b659dbf14ab8b34b0599d03ac0c8558392e315d33b2151dab2c91732ae94e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-02-22T19:00:38Z","title_canon_sha256":"e2a26eae627cdfb9846cbfff6a2492e239b0d1672432a32c23447b72b8162e8a"},"schema_version":"1.0","source":{"id":"2102.11302","kind":"arxiv","version":1}},"canonical_sha256":"295a158a829318360a04875868403bb41ee8e7a2bcf843956fefd786a1decca5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"295a158a829318360a04875868403bb41ee8e7a2bcf843956fefd786a1decca5","first_computed_at":"2026-07-05T02:31:53.457729Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:31:53.457729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kWa3z01kwDqUg0Q2+zZbYeCs6O0xx+d7gIAnqD+OQuWAAXUAJRI4VRReG4AQqeqCB0UVn0/AC50cg1Dapf5CAg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:31:53.458291Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.11302","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33b4a94919a4ed53087f851ebd1564da92d6c746a57a292a32d67c870cdcb2a2","sha256:48a0939bf63f3ca370b45d5c93ffeeed4bc3acef2bee122619049e023769bb0d"],"state_sha256":"1fc9393df179d1c5568cbd1edcdb59ec444f30dcb09e4978afcb7fd61f0e2576"}