{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:PKXUDL42PFL7SME6WSFHJTCLCV","short_pith_number":"pith:PKXUDL42","canonical_record":{"source":{"id":"1112.0012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-11-30T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"855c8d49fb61a076b05ff27258ea00efd08d1bc3c3c47cd2905aca9685f3e293","abstract_canon_sha256":"7511c538d521f0bdf5eebd8246cbc4a8cf67b6fca121a0685a8913524eb1867b"},"schema_version":"1.0"},"canonical_sha256":"7aaf41af9a7957f9309eb48a74cc4b1566c360ccd6cfbe7065da43c7ab695988","source":{"kind":"arxiv","id":"1112.0012","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.0012","created_at":"2026-05-18T03:41:40Z"},{"alias_kind":"arxiv_version","alias_value":"1112.0012v1","created_at":"2026-05-18T03:41:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.0012","created_at":"2026-05-18T03:41:40Z"},{"alias_kind":"pith_short_12","alias_value":"PKXUDL42PFL7","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"PKXUDL42PFL7SME6","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"PKXUDL42","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:PKXUDL42PFL7SME6WSFHJTCLCV","target":"record","payload":{"canonical_record":{"source":{"id":"1112.0012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-11-30T21:00:12Z","cross_cats_sorted":[],"title_canon_sha256":"855c8d49fb61a076b05ff27258ea00efd08d1bc3c3c47cd2905aca9685f3e293","abstract_canon_sha256":"7511c538d521f0bdf5eebd8246cbc4a8cf67b6fca121a0685a8913524eb1867b"},"schema_version":"1.0"},"canonical_sha256":"7aaf41af9a7957f9309eb48a74cc4b1566c360ccd6cfbe7065da43c7ab695988","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:41:40.437948Z","signature_b64":"hFnoxhMhTmEoBrQo4xUp2PqrTA0tP2ZhJSEUGKHww7lkor0H2tBClM6a8dQnPKZ1EamRGk4CE69hCeTcNlkOAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7aaf41af9a7957f9309eb48a74cc4b1566c360ccd6cfbe7065da43c7ab695988","last_reissued_at":"2026-05-18T03:41:40.437451Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:41:40.437451Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.0012","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":"2026-05-18T03:41:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jXwfIzCEINOfpBNVgJYuAsHhBFhhX4p+9eNkWdacb8G3fYGNLKrRLWYkVesyy0sCohmbxBjZJm54s1P0+2PQCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:09:14.453482Z"},"content_sha256":"b8018b1e9914e6244f9f26e471e459d29260f3c9cbc6421bee2e889c787ebbf5","schema_version":"1.0","event_id":"sha256:b8018b1e9914e6244f9f26e471e459d29260f3c9cbc6421bee2e889c787ebbf5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:PKXUDL42PFL7SME6WSFHJTCLCV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First detection of period doubling in a BL Herculis type star. Observations and theoretical models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Udalski, G. Pietrzynski, I. Soszynski, K. Ulaczyk, L. Wyrzykowski, M. K. Szymanski, M. Kubiak, P. Moskalik, P. Pietrukowicz, R. Poleski, R. Smolec, S. Kozlowski","submitted_at":"2011-11-30T21:00:12Z","abstract_excerpt":"We report on the discovery of the first BL Herculis star displaying period-doubling behaviour as predicted by the hydrodynamic models of Buchler & Moskalik. The star, with P=2.4d, is located in the Galactic bulge and was discovered with OGLE-III photometry. We present new nonlinear convective models, which, together with recent evolutionary tracks, put constraints on the stellar parameters. In particular, we estimate the mass and metallicity of the object."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.0012","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":"2026-05-18T03:41:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EUhsPZSFkxvhQbGZiMMok8MdA3WWA/EwpL27ruvsCup1M40RMR7mlWPvWevh2y498ngMYgJ64rfSTbzJ5DBGAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:09:14.454150Z"},"content_sha256":"c4b706e359acd381ef0bb880af45d3f71de0ecf76edbebb7293afdf16b48f705","schema_version":"1.0","event_id":"sha256:c4b706e359acd381ef0bb880af45d3f71de0ecf76edbebb7293afdf16b48f705"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PKXUDL42PFL7SME6WSFHJTCLCV/bundle.json","state_url":"https://pith.science/pith/PKXUDL42PFL7SME6WSFHJTCLCV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PKXUDL42PFL7SME6WSFHJTCLCV/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":"2026-05-30T06:09:14Z","links":{"resolver":"https://pith.science/pith/PKXUDL42PFL7SME6WSFHJTCLCV","bundle":"https://pith.science/pith/PKXUDL42PFL7SME6WSFHJTCLCV/bundle.json","state":"https://pith.science/pith/PKXUDL42PFL7SME6WSFHJTCLCV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PKXUDL42PFL7SME6WSFHJTCLCV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:PKXUDL42PFL7SME6WSFHJTCLCV","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":"7511c538d521f0bdf5eebd8246cbc4a8cf67b6fca121a0685a8913524eb1867b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-11-30T21:00:12Z","title_canon_sha256":"855c8d49fb61a076b05ff27258ea00efd08d1bc3c3c47cd2905aca9685f3e293"},"schema_version":"1.0","source":{"id":"1112.0012","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.0012","created_at":"2026-05-18T03:41:40Z"},{"alias_kind":"arxiv_version","alias_value":"1112.0012v1","created_at":"2026-05-18T03:41:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.0012","created_at":"2026-05-18T03:41:40Z"},{"alias_kind":"pith_short_12","alias_value":"PKXUDL42PFL7","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"PKXUDL42PFL7SME6","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"PKXUDL42","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:c4b706e359acd381ef0bb880af45d3f71de0ecf76edbebb7293afdf16b48f705","target":"graph","created_at":"2026-05-18T03:41:40Z","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 report on the discovery of the first BL Herculis star displaying period-doubling behaviour as predicted by the hydrodynamic models of Buchler & Moskalik. The star, with P=2.4d, is located in the Galactic bulge and was discovered with OGLE-III photometry. We present new nonlinear convective models, which, together with recent evolutionary tracks, put constraints on the stellar parameters. In particular, we estimate the mass and metallicity of the object.","authors_text":"A. Udalski, G. Pietrzynski, I. Soszynski, K. Ulaczyk, L. Wyrzykowski, M. K. Szymanski, M. Kubiak, P. Moskalik, P. Pietrukowicz, R. Poleski, R. Smolec, S. Kozlowski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-11-30T21:00:12Z","title":"First detection of period doubling in a BL Herculis type star. Observations and theoretical models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.0012","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:b8018b1e9914e6244f9f26e471e459d29260f3c9cbc6421bee2e889c787ebbf5","target":"record","created_at":"2026-05-18T03:41:40Z","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":"7511c538d521f0bdf5eebd8246cbc4a8cf67b6fca121a0685a8913524eb1867b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-11-30T21:00:12Z","title_canon_sha256":"855c8d49fb61a076b05ff27258ea00efd08d1bc3c3c47cd2905aca9685f3e293"},"schema_version":"1.0","source":{"id":"1112.0012","kind":"arxiv","version":1}},"canonical_sha256":"7aaf41af9a7957f9309eb48a74cc4b1566c360ccd6cfbe7065da43c7ab695988","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7aaf41af9a7957f9309eb48a74cc4b1566c360ccd6cfbe7065da43c7ab695988","first_computed_at":"2026-05-18T03:41:40.437451Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:41:40.437451Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hFnoxhMhTmEoBrQo4xUp2PqrTA0tP2ZhJSEUGKHww7lkor0H2tBClM6a8dQnPKZ1EamRGk4CE69hCeTcNlkOAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:41:40.437948Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.0012","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8018b1e9914e6244f9f26e471e459d29260f3c9cbc6421bee2e889c787ebbf5","sha256:c4b706e359acd381ef0bb880af45d3f71de0ecf76edbebb7293afdf16b48f705"],"state_sha256":"107a7eefbb79a4569b62f08f8ef907ec956d85973b641a81f04a98583c844993"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w03qh3fRzAOPqzKrDDZQrft/xJvadJfbkg4qwYSlIiVT8A01qM0A1+aqWMlSl84UR9bhYiXtMwKiHVEFhPneBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T06:09:14.457498Z","bundle_sha256":"1e94c7a499b16a62a43566e096a3d9139c8a02c46e37f9b4dea3e07c90f85fb0"}}