{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:DEUQYUC4HSXVYP7BVHEVG4ZI2P","short_pith_number":"pith:DEUQYUC4","canonical_record":{"source":{"id":"0905.0834","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-05-06T14:14:54Z","cross_cats_sorted":[],"title_canon_sha256":"d04120a6820fe8fc00ab9b10a2cf009e6b0a9aabc290339ce7574e3ac9b98009","abstract_canon_sha256":"6e980f56ac47d87f8627a2d2d36613c10d7bd994aca2dd2af102b8d899eb29e2"},"schema_version":"1.0"},"canonical_sha256":"19290c505c3caf5c3fe1a9c9537328d3d075a8501b8a4ea03029f661659a5d73","source":{"kind":"arxiv","id":"0905.0834","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.0834","created_at":"2026-05-18T02:13:47Z"},{"alias_kind":"arxiv_version","alias_value":"0905.0834v1","created_at":"2026-05-18T02:13:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.0834","created_at":"2026-05-18T02:13:47Z"},{"alias_kind":"pith_short_12","alias_value":"DEUQYUC4HSXV","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"DEUQYUC4HSXVYP7B","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"DEUQYUC4","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:DEUQYUC4HSXVYP7BVHEVG4ZI2P","target":"record","payload":{"canonical_record":{"source":{"id":"0905.0834","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-05-06T14:14:54Z","cross_cats_sorted":[],"title_canon_sha256":"d04120a6820fe8fc00ab9b10a2cf009e6b0a9aabc290339ce7574e3ac9b98009","abstract_canon_sha256":"6e980f56ac47d87f8627a2d2d36613c10d7bd994aca2dd2af102b8d899eb29e2"},"schema_version":"1.0"},"canonical_sha256":"19290c505c3caf5c3fe1a9c9537328d3d075a8501b8a4ea03029f661659a5d73","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:47.121357Z","signature_b64":"tSGM1JilBm1jLOH2eUl1OzHhTSEh6ZzxnNTI4kavkmZPjMPsCUw2Mb2Npu6UDs6WOiA8Rxfj/yViMFT0NK+mAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19290c505c3caf5c3fe1a9c9537328d3d075a8501b8a4ea03029f661659a5d73","last_reissued_at":"2026-05-18T02:13:47.120617Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:47.120617Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.0834","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":"2026-05-18T02:13:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RSqTUbZZkppD3obHF4c+jt4jldzOeXqDOktobavX82NETpDFfDaiDXEWp9J1nY8O7mlFXFsSom5iGs5PKL4nDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:43:06.992528Z"},"content_sha256":"40fd875de43f4545ea2bd979de3323c84b02c8aafd13d3bdacbf368b404bffbf","schema_version":"1.0","event_id":"sha256:40fd875de43f4545ea2bd979de3323c84b02c8aafd13d3bdacbf368b404bffbf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:DEUQYUC4HSXVYP7BVHEVG4ZI2P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Does Collinder 236 host a Cepheid calibrator?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Daniel J. Majaess, David G. Turner, D. Forbes, Leonid N. Berdnikov, Mohamed Abdel-Sabour Abdel-Latif, P. J. T. Leonard","submitted_at":"2009-05-06T14:14:54Z","abstract_excerpt":"Photoelectric UBV photometry and star counts are presented for the previously unstudied open cluster Collinder 236, supplemented by observations for stars near the Cepheid WZ Car. Collinder 236 is typical of groups associated with Cepheids, with an evolutionary age of (3.4+-1.1)x10^7 years, but it is 1944+-71 pc distant, only half the predicted distance to WZ Car. The cluster is reddened by E(B-V)~0.26, and has nuclear and coronal radii of rn~2 arcmin (1.1 pc) and Rc~8 arcmin (4.5 pc), respectively. The Cepheid is not a member of Collinder 236 on the basis of location beyond the cluster tidal "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.0834","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":"2026-05-18T02:13:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CwERuc04cxfirZbV5dHDxy2Wl6NsJ8SPSc3PvQKQw1Hss60MN31iizfXAdkpyz3J239XFuF+bunwANzpf6wZDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:43:06.992897Z"},"content_sha256":"ac919d05f829d70ad293eadcdd2b2e96a07b4c0383ab2383d9bcebe385a07e94","schema_version":"1.0","event_id":"sha256:ac919d05f829d70ad293eadcdd2b2e96a07b4c0383ab2383d9bcebe385a07e94"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DEUQYUC4HSXVYP7BVHEVG4ZI2P/bundle.json","state_url":"https://pith.science/pith/DEUQYUC4HSXVYP7BVHEVG4ZI2P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DEUQYUC4HSXVYP7BVHEVG4ZI2P/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":"2026-05-25T16:43:06Z","links":{"resolver":"https://pith.science/pith/DEUQYUC4HSXVYP7BVHEVG4ZI2P","bundle":"https://pith.science/pith/DEUQYUC4HSXVYP7BVHEVG4ZI2P/bundle.json","state":"https://pith.science/pith/DEUQYUC4HSXVYP7BVHEVG4ZI2P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DEUQYUC4HSXVYP7BVHEVG4ZI2P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:DEUQYUC4HSXVYP7BVHEVG4ZI2P","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":"6e980f56ac47d87f8627a2d2d36613c10d7bd994aca2dd2af102b8d899eb29e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-05-06T14:14:54Z","title_canon_sha256":"d04120a6820fe8fc00ab9b10a2cf009e6b0a9aabc290339ce7574e3ac9b98009"},"schema_version":"1.0","source":{"id":"0905.0834","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.0834","created_at":"2026-05-18T02:13:47Z"},{"alias_kind":"arxiv_version","alias_value":"0905.0834v1","created_at":"2026-05-18T02:13:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.0834","created_at":"2026-05-18T02:13:47Z"},{"alias_kind":"pith_short_12","alias_value":"DEUQYUC4HSXV","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"DEUQYUC4HSXVYP7B","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"DEUQYUC4","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:ac919d05f829d70ad293eadcdd2b2e96a07b4c0383ab2383d9bcebe385a07e94","target":"graph","created_at":"2026-05-18T02:13:47Z","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":"Photoelectric UBV photometry and star counts are presented for the previously unstudied open cluster Collinder 236, supplemented by observations for stars near the Cepheid WZ Car. Collinder 236 is typical of groups associated with Cepheids, with an evolutionary age of (3.4+-1.1)x10^7 years, but it is 1944+-71 pc distant, only half the predicted distance to WZ Car. The cluster is reddened by E(B-V)~0.26, and has nuclear and coronal radii of rn~2 arcmin (1.1 pc) and Rc~8 arcmin (4.5 pc), respectively. The Cepheid is not a member of Collinder 236 on the basis of location beyond the cluster tidal ","authors_text":"Daniel J. Majaess, David G. Turner, D. Forbes, Leonid N. Berdnikov, Mohamed Abdel-Sabour Abdel-Latif, P. J. T. Leonard","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-05-06T14:14:54Z","title":"Does Collinder 236 host a Cepheid calibrator?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.0834","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":"sha256:40fd875de43f4545ea2bd979de3323c84b02c8aafd13d3bdacbf368b404bffbf","target":"record","created_at":"2026-05-18T02:13:47Z","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":"6e980f56ac47d87f8627a2d2d36613c10d7bd994aca2dd2af102b8d899eb29e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-05-06T14:14:54Z","title_canon_sha256":"d04120a6820fe8fc00ab9b10a2cf009e6b0a9aabc290339ce7574e3ac9b98009"},"schema_version":"1.0","source":{"id":"0905.0834","kind":"arxiv","version":1}},"canonical_sha256":"19290c505c3caf5c3fe1a9c9537328d3d075a8501b8a4ea03029f661659a5d73","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19290c505c3caf5c3fe1a9c9537328d3d075a8501b8a4ea03029f661659a5d73","first_computed_at":"2026-05-18T02:13:47.120617Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:47.120617Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tSGM1JilBm1jLOH2eUl1OzHhTSEh6ZzxnNTI4kavkmZPjMPsCUw2Mb2Npu6UDs6WOiA8Rxfj/yViMFT0NK+mAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:47.121357Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.0834","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:40fd875de43f4545ea2bd979de3323c84b02c8aafd13d3bdacbf368b404bffbf","sha256:ac919d05f829d70ad293eadcdd2b2e96a07b4c0383ab2383d9bcebe385a07e94"],"state_sha256":"5a437515f8d0d91f18f990bce1679a04cee8e6717689fac86934d0422c6c3b07"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oAeT2Z2WQrkkuZy5BBdA3eICaptTIl1O5Fn+GUrQfZfiMKhXgJkxrsJ2Vne+H3VJhlFebsbI4T7ss5j9i2f4Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:43:06.999372Z","bundle_sha256":"48d486cd27256148157f80f36991e6016ce81bae65039d1e15ab6596a493b164"}}