{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:UI6YBP6PJMKSGEJ2FURNEMQCJH","short_pith_number":"pith:UI6YBP6P","canonical_record":{"source":{"id":"1107.3183","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-15T23:48:22Z","cross_cats_sorted":[],"title_canon_sha256":"80228fdbc98df7f5bdb0a7bf0d453b3943e58967c23ba6f6cda81d3b3da6b8fd","abstract_canon_sha256":"a0c2cfc6ee8f894a8fdc71b05419fcafb5eb8ce0df9467e8f392eb440a2d87fc"},"schema_version":"1.0"},"canonical_sha256":"a23d80bfcf4b1523113a2d22d2320249d03ba9fe2db30fcbd357fba4bf6f5177","source":{"kind":"arxiv","id":"1107.3183","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.3183","created_at":"2026-05-18T02:01:15Z"},{"alias_kind":"arxiv_version","alias_value":"1107.3183v1","created_at":"2026-05-18T02:01:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.3183","created_at":"2026-05-18T02:01:15Z"},{"alias_kind":"pith_short_12","alias_value":"UI6YBP6PJMKS","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"UI6YBP6PJMKSGEJ2","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"UI6YBP6P","created_at":"2026-05-18T12:26:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:UI6YBP6PJMKSGEJ2FURNEMQCJH","target":"record","payload":{"canonical_record":{"source":{"id":"1107.3183","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-15T23:48:22Z","cross_cats_sorted":[],"title_canon_sha256":"80228fdbc98df7f5bdb0a7bf0d453b3943e58967c23ba6f6cda81d3b3da6b8fd","abstract_canon_sha256":"a0c2cfc6ee8f894a8fdc71b05419fcafb5eb8ce0df9467e8f392eb440a2d87fc"},"schema_version":"1.0"},"canonical_sha256":"a23d80bfcf4b1523113a2d22d2320249d03ba9fe2db30fcbd357fba4bf6f5177","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:15.923541Z","signature_b64":"4AGOAKOuRHhRItG4hd4xGF1IFTzN30H4WzKuASbFV0uaN+V3+SHsJiaPthuU+SdA95VUs1Ay3zarT5JFZHNvDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a23d80bfcf4b1523113a2d22d2320249d03ba9fe2db30fcbd357fba4bf6f5177","last_reissued_at":"2026-05-18T02:01:15.922773Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:15.922773Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.3183","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":"2026-05-18T02:01:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fEkwXYq3ICUtHyOhvDY2484OD1sKNJPaQxZbnvZcP7n6Wz/y/am0SrKMyi33lvAxcAli/un8qEavWFievu5GDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:34:54.285613Z"},"content_sha256":"9ba19b088add222ee224b5a48e1c8cf8472b0a58e5496e33aaa4654743c3a0ae","schema_version":"1.0","event_id":"sha256:9ba19b088add222ee224b5a48e1c8cf8472b0a58e5496e33aaa4654743c3a0ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:UI6YBP6PJMKSGEJ2FURNEMQCJH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detailed Abundances of the Solar Twins 16 Cygni A and B: Constraining Planet Formation Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A.M. Boesgaard, C.P. Deliyannis, J.R. King, K. Cunha, L. Ghezzi, S.C. Schuler, V.V. Smith","submitted_at":"2011-07-15T23:48:22Z","abstract_excerpt":"Results of a detailed abundance analysis of the solar twins 16 Cyg A and 16 Cyg B based on high-resolution, high signal-to-noise ratio echelle spectroscopy are presented. 16 Cyg B is known to host a giant planet while no planets have yet been detected around 16 Cyg A. Stellar parameters are derived directly from our high-quality spectra, and the stars are found to be physically similar, with Delta_T_eff = +43 K, Delta_logg = -0.02 dex, and Delta_xi = +0.10 km/s (in the sense of A - B), consistent with previous findings. Abundances of 15 elements are derived and are found to be indistinguishabl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.3183","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":"2026-05-18T02:01:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FjZLbcwQDY9xELjtIWBICobyic7YzewGQ/Bx27uOOGDCwR8DhnuYEF0blbxdrZaw+XTzDsxvqScbLLV9QJ9BAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:34:54.286363Z"},"content_sha256":"785699bc0f8a58c4e3a4d10033069450be36831bf34ddcda5664f45935a988f4","schema_version":"1.0","event_id":"sha256:785699bc0f8a58c4e3a4d10033069450be36831bf34ddcda5664f45935a988f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UI6YBP6PJMKSGEJ2FURNEMQCJH/bundle.json","state_url":"https://pith.science/pith/UI6YBP6PJMKSGEJ2FURNEMQCJH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UI6YBP6PJMKSGEJ2FURNEMQCJH/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":"2026-05-29T15:34:54Z","links":{"resolver":"https://pith.science/pith/UI6YBP6PJMKSGEJ2FURNEMQCJH","bundle":"https://pith.science/pith/UI6YBP6PJMKSGEJ2FURNEMQCJH/bundle.json","state":"https://pith.science/pith/UI6YBP6PJMKSGEJ2FURNEMQCJH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UI6YBP6PJMKSGEJ2FURNEMQCJH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:UI6YBP6PJMKSGEJ2FURNEMQCJH","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":"a0c2cfc6ee8f894a8fdc71b05419fcafb5eb8ce0df9467e8f392eb440a2d87fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-15T23:48:22Z","title_canon_sha256":"80228fdbc98df7f5bdb0a7bf0d453b3943e58967c23ba6f6cda81d3b3da6b8fd"},"schema_version":"1.0","source":{"id":"1107.3183","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.3183","created_at":"2026-05-18T02:01:15Z"},{"alias_kind":"arxiv_version","alias_value":"1107.3183v1","created_at":"2026-05-18T02:01:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.3183","created_at":"2026-05-18T02:01:15Z"},{"alias_kind":"pith_short_12","alias_value":"UI6YBP6PJMKS","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"UI6YBP6PJMKSGEJ2","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"UI6YBP6P","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:785699bc0f8a58c4e3a4d10033069450be36831bf34ddcda5664f45935a988f4","target":"graph","created_at":"2026-05-18T02:01:15Z","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":"Results of a detailed abundance analysis of the solar twins 16 Cyg A and 16 Cyg B based on high-resolution, high signal-to-noise ratio echelle spectroscopy are presented. 16 Cyg B is known to host a giant planet while no planets have yet been detected around 16 Cyg A. Stellar parameters are derived directly from our high-quality spectra, and the stars are found to be physically similar, with Delta_T_eff = +43 K, Delta_logg = -0.02 dex, and Delta_xi = +0.10 km/s (in the sense of A - B), consistent with previous findings. Abundances of 15 elements are derived and are found to be indistinguishabl","authors_text":"A.M. Boesgaard, C.P. Deliyannis, J.R. King, K. Cunha, L. Ghezzi, S.C. Schuler, V.V. Smith","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-15T23:48:22Z","title":"Detailed Abundances of the Solar Twins 16 Cygni A and B: Constraining Planet Formation Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.3183","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":"sha256:9ba19b088add222ee224b5a48e1c8cf8472b0a58e5496e33aaa4654743c3a0ae","target":"record","created_at":"2026-05-18T02:01:15Z","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":"a0c2cfc6ee8f894a8fdc71b05419fcafb5eb8ce0df9467e8f392eb440a2d87fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-15T23:48:22Z","title_canon_sha256":"80228fdbc98df7f5bdb0a7bf0d453b3943e58967c23ba6f6cda81d3b3da6b8fd"},"schema_version":"1.0","source":{"id":"1107.3183","kind":"arxiv","version":1}},"canonical_sha256":"a23d80bfcf4b1523113a2d22d2320249d03ba9fe2db30fcbd357fba4bf6f5177","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a23d80bfcf4b1523113a2d22d2320249d03ba9fe2db30fcbd357fba4bf6f5177","first_computed_at":"2026-05-18T02:01:15.922773Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:15.922773Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4AGOAKOuRHhRItG4hd4xGF1IFTzN30H4WzKuASbFV0uaN+V3+SHsJiaPthuU+SdA95VUs1Ay3zarT5JFZHNvDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:15.923541Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.3183","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ba19b088add222ee224b5a48e1c8cf8472b0a58e5496e33aaa4654743c3a0ae","sha256:785699bc0f8a58c4e3a4d10033069450be36831bf34ddcda5664f45935a988f4"],"state_sha256":"86ccaf9757d38b79c1269784af6bca9e365db836cecdbe276f85c1e9741340ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mX6NWvvITy8Ve5FRn3LiDJR5e6xoFXvKa+m7Y/UjUe/Kuf/ZfKqDWvWZkzrBsiDdID4gXwBntmAlTfFAySr9DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T15:34:54.290053Z","bundle_sha256":"ae5640eb28dc735acd36dc8acd7ae67a91c260c320f5ffd733f7155878970930"}}