{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:CVHQOSIZ2COVBYVOTF5JRFEWF5","short_pith_number":"pith:CVHQOSIZ","canonical_record":{"source":{"id":"0907.2818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-16T12:14:30Z","cross_cats_sorted":[],"title_canon_sha256":"06dbd0603f35f71b61baf7f7251d71b65222e501a609d6882a0d5c31f4666117","abstract_canon_sha256":"c1d5437cca7df5dcad1d213deca7d468d819019e814faa8f9c6608ea84a59032"},"schema_version":"1.0"},"canonical_sha256":"154f074919d09d50e2ae997a9894962f5650f32f49b0d3ac5d852243b5e7e2e6","source":{"kind":"arxiv","id":"0907.2818","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.2818","created_at":"2026-05-18T02:13:02Z"},{"alias_kind":"arxiv_version","alias_value":"0907.2818v1","created_at":"2026-05-18T02:13:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.2818","created_at":"2026-05-18T02:13:02Z"},{"alias_kind":"pith_short_12","alias_value":"CVHQOSIZ2COV","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"CVHQOSIZ2COVBYVO","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"CVHQOSIZ","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:CVHQOSIZ2COVBYVOTF5JRFEWF5","target":"record","payload":{"canonical_record":{"source":{"id":"0907.2818","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-16T12:14:30Z","cross_cats_sorted":[],"title_canon_sha256":"06dbd0603f35f71b61baf7f7251d71b65222e501a609d6882a0d5c31f4666117","abstract_canon_sha256":"c1d5437cca7df5dcad1d213deca7d468d819019e814faa8f9c6608ea84a59032"},"schema_version":"1.0"},"canonical_sha256":"154f074919d09d50e2ae997a9894962f5650f32f49b0d3ac5d852243b5e7e2e6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:02.445260Z","signature_b64":"UXWZIIOc4iWvs7J1THLA478EScNgNm3hWYdrf5HtR0+UJLnYYE8aHTLkxw9ke6tBZ4fv2Vb/EtAVfo86vO2SCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"154f074919d09d50e2ae997a9894962f5650f32f49b0d3ac5d852243b5e7e2e6","last_reissued_at":"2026-05-18T02:13:02.443537Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:02.443537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.2818","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":"2026-05-18T02:13:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dO0r973N3sFR8wfCnb2OeK8VJN9jCYmpzjHqXr7itXpWonh0EyOu2b4WWpMY8nkXDK2be5bwIQEpVTCbfKROBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:27:46.372129Z"},"content_sha256":"5a75892875f9fd4588862b41b45ecaac046fa65b432b49275c71dcec2d517625","schema_version":"1.0","event_id":"sha256:5a75892875f9fd4588862b41b45ecaac046fa65b432b49275c71dcec2d517625"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:CVHQOSIZ2COVBYVOTF5JRFEWF5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stochastic Processes in Yellow and Red Pulsating Variables","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"David G. Turner, J. R. Percy, Leonid N. Berdnikov, Mohamed Abdel-Sabour Abdel-Latif, T. Colivas","submitted_at":"2009-07-16T12:14:30Z","abstract_excerpt":"Random changes in pulsation period are well established in cool pulsating stars, in particular the red giant variables: Miras, semi-regulars of types A and B, and RV Tau variables. Such effects are also observed in a handful of Cepheids, the SX Phe variable XX Cyg, and, most recently, the red supergiant variable, BC Cyg, a type C semi-regular. The nature of such fluctuations is seemingly random over a few pulsation cycles of the stars, yet the regularity of the primary pulsation mechanism dominates over the long term. The degree of stochasticity is linked to the dimensions of the stars, the ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.2818","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":"2026-05-18T02:13:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OBlHf2prtPhDpFvX/q4rDhuPIf8ZvhRzsFDWv7C0WXrky3slVDPSVJWrJBrvG5+s04i1jDftqGpKHl6QS6MRDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T09:27:46.372768Z"},"content_sha256":"1dfe5ddacb25cd31e97191cf4d394238f509084ebf7ccb4749d7586ade2979f3","schema_version":"1.0","event_id":"sha256:1dfe5ddacb25cd31e97191cf4d394238f509084ebf7ccb4749d7586ade2979f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CVHQOSIZ2COVBYVOTF5JRFEWF5/bundle.json","state_url":"https://pith.science/pith/CVHQOSIZ2COVBYVOTF5JRFEWF5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CVHQOSIZ2COVBYVOTF5JRFEWF5/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":"2026-05-25T09:27:46Z","links":{"resolver":"https://pith.science/pith/CVHQOSIZ2COVBYVOTF5JRFEWF5","bundle":"https://pith.science/pith/CVHQOSIZ2COVBYVOTF5JRFEWF5/bundle.json","state":"https://pith.science/pith/CVHQOSIZ2COVBYVOTF5JRFEWF5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CVHQOSIZ2COVBYVOTF5JRFEWF5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:CVHQOSIZ2COVBYVOTF5JRFEWF5","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":"c1d5437cca7df5dcad1d213deca7d468d819019e814faa8f9c6608ea84a59032","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-16T12:14:30Z","title_canon_sha256":"06dbd0603f35f71b61baf7f7251d71b65222e501a609d6882a0d5c31f4666117"},"schema_version":"1.0","source":{"id":"0907.2818","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.2818","created_at":"2026-05-18T02:13:02Z"},{"alias_kind":"arxiv_version","alias_value":"0907.2818v1","created_at":"2026-05-18T02:13:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.2818","created_at":"2026-05-18T02:13:02Z"},{"alias_kind":"pith_short_12","alias_value":"CVHQOSIZ2COV","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"CVHQOSIZ2COVBYVO","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"CVHQOSIZ","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:1dfe5ddacb25cd31e97191cf4d394238f509084ebf7ccb4749d7586ade2979f3","target":"graph","created_at":"2026-05-18T02:13:02Z","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":"Random changes in pulsation period are well established in cool pulsating stars, in particular the red giant variables: Miras, semi-regulars of types A and B, and RV Tau variables. Such effects are also observed in a handful of Cepheids, the SX Phe variable XX Cyg, and, most recently, the red supergiant variable, BC Cyg, a type C semi-regular. The nature of such fluctuations is seemingly random over a few pulsation cycles of the stars, yet the regularity of the primary pulsation mechanism dominates over the long term. The degree of stochasticity is linked to the dimensions of the stars, the ra","authors_text":"David G. Turner, J. R. Percy, Leonid N. Berdnikov, Mohamed Abdel-Sabour Abdel-Latif, T. Colivas","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-16T12:14:30Z","title":"Stochastic Processes in Yellow and Red Pulsating Variables"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.2818","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":"sha256:5a75892875f9fd4588862b41b45ecaac046fa65b432b49275c71dcec2d517625","target":"record","created_at":"2026-05-18T02:13:02Z","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":"c1d5437cca7df5dcad1d213deca7d468d819019e814faa8f9c6608ea84a59032","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-16T12:14:30Z","title_canon_sha256":"06dbd0603f35f71b61baf7f7251d71b65222e501a609d6882a0d5c31f4666117"},"schema_version":"1.0","source":{"id":"0907.2818","kind":"arxiv","version":1}},"canonical_sha256":"154f074919d09d50e2ae997a9894962f5650f32f49b0d3ac5d852243b5e7e2e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"154f074919d09d50e2ae997a9894962f5650f32f49b0d3ac5d852243b5e7e2e6","first_computed_at":"2026-05-18T02:13:02.443537Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:02.443537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UXWZIIOc4iWvs7J1THLA478EScNgNm3hWYdrf5HtR0+UJLnYYE8aHTLkxw9ke6tBZ4fv2Vb/EtAVfo86vO2SCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:02.445260Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.2818","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5a75892875f9fd4588862b41b45ecaac046fa65b432b49275c71dcec2d517625","sha256:1dfe5ddacb25cd31e97191cf4d394238f509084ebf7ccb4749d7586ade2979f3"],"state_sha256":"d7ad0b1b622519699d16c12a4d9cda042486b61a028e3a6da029199d980582c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IDmj9+nxndo0QWYnpYa/vPqcq0vlNHz4D6ZfgcXBI449uaX1EOw0Pcu+s6CIooUPF8eN8P/fXoV1jDS3lPx0Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T09:27:46.376254Z","bundle_sha256":"3222373a084716a67487affb432433cfe013663b6f06372fdcca89289e8f89f7"}}