{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:BB2OPW5IJA6NS6IPOSCQ6FOUVI","short_pith_number":"pith:BB2OPW5I","canonical_record":{"source":{"id":"1112.1046","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-05T20:14:41Z","cross_cats_sorted":[],"title_canon_sha256":"a79f6b36bc9f36bccd3c949aabe2e575d8f1e77b806b20d68ef8b19c496aeeae","abstract_canon_sha256":"0cfbe4986e971b643ddce487d1ef9a71a541ebf762baf32a022b9118aa494cc1"},"schema_version":"1.0"},"canonical_sha256":"0874e7dba8483cd9790f74850f15d4aa0a4270ae18fb5993a3b1e0aa0ee34dd7","source":{"kind":"arxiv","id":"1112.1046","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.1046","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"arxiv_version","alias_value":"1112.1046v1","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.1046","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"pith_short_12","alias_value":"BB2OPW5IJA6N","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"BB2OPW5IJA6NS6IP","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"BB2OPW5I","created_at":"2026-05-18T12:26:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:BB2OPW5IJA6NS6IPOSCQ6FOUVI","target":"record","payload":{"canonical_record":{"source":{"id":"1112.1046","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-05T20:14:41Z","cross_cats_sorted":[],"title_canon_sha256":"a79f6b36bc9f36bccd3c949aabe2e575d8f1e77b806b20d68ef8b19c496aeeae","abstract_canon_sha256":"0cfbe4986e971b643ddce487d1ef9a71a541ebf762baf32a022b9118aa494cc1"},"schema_version":"1.0"},"canonical_sha256":"0874e7dba8483cd9790f74850f15d4aa0a4270ae18fb5993a3b1e0aa0ee34dd7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:06:57.120855Z","signature_b64":"Ehcpdo/EuXrURmSJvIDxzezUq55BCga9Siw2Pv5hosXZEkyPzXtcMS8USHBoBHLLyX6FDWT6ysvFWurBEh5eDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0874e7dba8483cd9790f74850f15d4aa0a4270ae18fb5993a3b1e0aa0ee34dd7","last_reissued_at":"2026-05-18T04:06:57.120262Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:06:57.120262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1112.1046","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":"2026-05-18T04:06:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mmL/I3ud0I09IEVUiX88H078T/GKh5SKLHJRS35jy99NkKMZkCB6cAmLjkWWdharxCCX1YC4aeu2aMN4zrrzDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:47:04.217537Z"},"content_sha256":"410771c90a918340dfaa6371667262d924082df6d954ea70f14fe6d3d29d3d51","schema_version":"1.0","event_id":"sha256:410771c90a918340dfaa6371667262d924082df6d954ea70f14fe6d3d29d3d51"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:BB2OPW5IJA6NS6IPOSCQ6FOUVI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New Links between Pulsation and Stellar History","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Nancy Remage Evans","submitted_at":"2011-12-05T20:14:41Z","abstract_excerpt":"New instrumentation is providing new insights into intermediate mass pulsating Cepheids, particularly about their formation and history. Three approaches are discussed, using space (Hubble and Chandra) and ground-based studies (radial velocities). First, we are conducting a survey of Cepheids with the Hubble Space Telescope Wide Field Camera 3 (WFC3) to identify possible resolved companions (for example Eta Aql) and thus provide constraints on star formation. Followup X-ray observations (Chandra and XMM-Newton) can confirm whether possible low mass companions are young enough to be physical co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.1046","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":"2026-05-18T04:06:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g1Ylso9uAlXnhQyXa0VB9T3H+4s/kRKDPP5UlVGv0z4VP5WASKhR1C7idhho1XxcBtz0EPMks9lXRtwzXBW2BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:47:04.218358Z"},"content_sha256":"7c8c33810b6c5d1a07a0858364974abaa5af5bb3ae4a40b59c3f38eba758da72","schema_version":"1.0","event_id":"sha256:7c8c33810b6c5d1a07a0858364974abaa5af5bb3ae4a40b59c3f38eba758da72"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BB2OPW5IJA6NS6IPOSCQ6FOUVI/bundle.json","state_url":"https://pith.science/pith/BB2OPW5IJA6NS6IPOSCQ6FOUVI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BB2OPW5IJA6NS6IPOSCQ6FOUVI/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":"2026-06-02T15:47:04Z","links":{"resolver":"https://pith.science/pith/BB2OPW5IJA6NS6IPOSCQ6FOUVI","bundle":"https://pith.science/pith/BB2OPW5IJA6NS6IPOSCQ6FOUVI/bundle.json","state":"https://pith.science/pith/BB2OPW5IJA6NS6IPOSCQ6FOUVI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BB2OPW5IJA6NS6IPOSCQ6FOUVI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:BB2OPW5IJA6NS6IPOSCQ6FOUVI","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":"0cfbe4986e971b643ddce487d1ef9a71a541ebf762baf32a022b9118aa494cc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-05T20:14:41Z","title_canon_sha256":"a79f6b36bc9f36bccd3c949aabe2e575d8f1e77b806b20d68ef8b19c496aeeae"},"schema_version":"1.0","source":{"id":"1112.1046","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1112.1046","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"arxiv_version","alias_value":"1112.1046v1","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1112.1046","created_at":"2026-05-18T04:06:57Z"},{"alias_kind":"pith_short_12","alias_value":"BB2OPW5IJA6N","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"BB2OPW5IJA6NS6IP","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"BB2OPW5I","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:7c8c33810b6c5d1a07a0858364974abaa5af5bb3ae4a40b59c3f38eba758da72","target":"graph","created_at":"2026-05-18T04:06:57Z","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":"New instrumentation is providing new insights into intermediate mass pulsating Cepheids, particularly about their formation and history. Three approaches are discussed, using space (Hubble and Chandra) and ground-based studies (radial velocities). First, we are conducting a survey of Cepheids with the Hubble Space Telescope Wide Field Camera 3 (WFC3) to identify possible resolved companions (for example Eta Aql) and thus provide constraints on star formation. Followup X-ray observations (Chandra and XMM-Newton) can confirm whether possible low mass companions are young enough to be physical co","authors_text":"Nancy Remage Evans","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-05T20:14:41Z","title":"New Links between Pulsation and Stellar History"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1112.1046","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":"sha256:410771c90a918340dfaa6371667262d924082df6d954ea70f14fe6d3d29d3d51","target":"record","created_at":"2026-05-18T04:06:57Z","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":"0cfbe4986e971b643ddce487d1ef9a71a541ebf762baf32a022b9118aa494cc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-12-05T20:14:41Z","title_canon_sha256":"a79f6b36bc9f36bccd3c949aabe2e575d8f1e77b806b20d68ef8b19c496aeeae"},"schema_version":"1.0","source":{"id":"1112.1046","kind":"arxiv","version":1}},"canonical_sha256":"0874e7dba8483cd9790f74850f15d4aa0a4270ae18fb5993a3b1e0aa0ee34dd7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0874e7dba8483cd9790f74850f15d4aa0a4270ae18fb5993a3b1e0aa0ee34dd7","first_computed_at":"2026-05-18T04:06:57.120262Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:06:57.120262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ehcpdo/EuXrURmSJvIDxzezUq55BCga9Siw2Pv5hosXZEkyPzXtcMS8USHBoBHLLyX6FDWT6ysvFWurBEh5eDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:06:57.120855Z","signed_message":"canonical_sha256_bytes"},"source_id":"1112.1046","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:410771c90a918340dfaa6371667262d924082df6d954ea70f14fe6d3d29d3d51","sha256:7c8c33810b6c5d1a07a0858364974abaa5af5bb3ae4a40b59c3f38eba758da72"],"state_sha256":"73e5a52f62278357bf6145c4becc36ef9f9ce639610689e2b22ad4929995519f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9lotTkrNN76ZgyMol7pdtwiRJNrl2XrGCNPeIS8cKzQ1XEtC4IwckJNMx3+0lNxRrBIPjjokv78lgc/1V+ijBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T15:47:04.221636Z","bundle_sha256":"e628098ecae2e49597de6509373b3d2055e3a46189e2a32ae2e1834596b8659b"}}