{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:NMULUAPDNILDKBZV7YEWHMW2R4","short_pith_number":"pith:NMULUAPD","canonical_record":{"source":{"id":"1501.02167","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-09T15:07:49Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"bb60769d03d5e0a0a1a3e318f1b0034d8cc5395eb3c58108f6338f7dde492b6a","abstract_canon_sha256":"4b5c45f64c6a8d5aec4b3dccee35bcabc1250e6a8f96e73a2158342965239e1e"},"schema_version":"1.0"},"canonical_sha256":"6b28ba01e36a16350735fe0963b2da8f3d1a4cc993a0087c6c685b939e1d8e1e","source":{"kind":"arxiv","id":"1501.02167","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.02167","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"arxiv_version","alias_value":"1501.02167v2","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.02167","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"pith_short_12","alias_value":"NMULUAPDNILD","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NMULUAPDNILDKBZV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NMULUAPD","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:NMULUAPDNILDKBZV7YEWHMW2R4","target":"record","payload":{"canonical_record":{"source":{"id":"1501.02167","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-09T15:07:49Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"bb60769d03d5e0a0a1a3e318f1b0034d8cc5395eb3c58108f6338f7dde492b6a","abstract_canon_sha256":"4b5c45f64c6a8d5aec4b3dccee35bcabc1250e6a8f96e73a2158342965239e1e"},"schema_version":"1.0"},"canonical_sha256":"6b28ba01e36a16350735fe0963b2da8f3d1a4cc993a0087c6c685b939e1d8e1e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:11.929136Z","signature_b64":"7+E4Kaz3a6zxH12ilOwDKyFa6KGhlahLk3QOzeTLXuPZAdjysa7j2EVJDUx9Msm1i289X8GhJr+opsWhzIQzCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6b28ba01e36a16350735fe0963b2da8f3d1a4cc993a0087c6c685b939e1d8e1e","last_reissued_at":"2026-05-18T01:41:11.928616Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:11.928616Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.02167","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:41:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W0blW6FWYDm4nyAfFYbMH+Jyy7dyeC/z2osRNSAjDRJyyv9aR/r+Fb38HAMDR8jgTp8pYgvpOTGokq6lRM0iDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:56:48.403072Z"},"content_sha256":"c701af42df8542b8c3b89aa1a86cfa4cbfef95b56195db26aadf4eeccacac822","schema_version":"1.0","event_id":"sha256:c701af42df8542b8c3b89aa1a86cfa4cbfef95b56195db26aadf4eeccacac822"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:NMULUAPDNILDKBZV7YEWHMW2R4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Abundance Differences Between Exoplanet Binary Host Stars XO-2N and XO-2S -- Dependence on Stellar Parameters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Carnegie Origins Fellow), Johanna K. Teske (Carnegie DTM/OCIW, Katia Cunha (Steward Observatory, Luan Ghezzi (Harvard SAO), Maria Bergemann (MPIA), Observatorio Nacional), Simon C. Schuler (University of Tampa), University of Arizona, Verne V. Smith (NOAO)","submitted_at":"2015-01-09T15:07:49Z","abstract_excerpt":"The chemical composition of exoplanet host stars is an important factor in understanding the formation and characteristics of their orbiting planets. The best example of this to date is the planet-metallicity correlation. Other proposed correlations are thus far less robust, in part due to uncertainty in the chemical history of stars pre- and post-planet formation. Binary host stars of similar type present an opportunity to isolate the effects of planets on host star abundances. Here we present a differential elemental abundance analysis of the XO-2 stellar binary, in which both G9 stars host "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.02167","kind":"arxiv","version":2},"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":"2026-05-18T01:41:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I5qsfXP87mjlWRVFU2gXOuH1lU1/OHIH+Um6VVV/SrpxsbvHXVRIBsQMkh3a2am1HMKcQ/K4Eke07VX3WDCiDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T11:56:48.403641Z"},"content_sha256":"a56a7799468abd9dd7d7c891197da86d3617fe06b76381746a97d6a1aa323a58","schema_version":"1.0","event_id":"sha256:a56a7799468abd9dd7d7c891197da86d3617fe06b76381746a97d6a1aa323a58"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NMULUAPDNILDKBZV7YEWHMW2R4/bundle.json","state_url":"https://pith.science/pith/NMULUAPDNILDKBZV7YEWHMW2R4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NMULUAPDNILDKBZV7YEWHMW2R4/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":"2026-05-30T11:56:48Z","links":{"resolver":"https://pith.science/pith/NMULUAPDNILDKBZV7YEWHMW2R4","bundle":"https://pith.science/pith/NMULUAPDNILDKBZV7YEWHMW2R4/bundle.json","state":"https://pith.science/pith/NMULUAPDNILDKBZV7YEWHMW2R4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NMULUAPDNILDKBZV7YEWHMW2R4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:NMULUAPDNILDKBZV7YEWHMW2R4","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":"4b5c45f64c6a8d5aec4b3dccee35bcabc1250e6a8f96e73a2158342965239e1e","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-09T15:07:49Z","title_canon_sha256":"bb60769d03d5e0a0a1a3e318f1b0034d8cc5395eb3c58108f6338f7dde492b6a"},"schema_version":"1.0","source":{"id":"1501.02167","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.02167","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"arxiv_version","alias_value":"1501.02167v2","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.02167","created_at":"2026-05-18T01:41:11Z"},{"alias_kind":"pith_short_12","alias_value":"NMULUAPDNILD","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"NMULUAPDNILDKBZV","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"NMULUAPD","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:a56a7799468abd9dd7d7c891197da86d3617fe06b76381746a97d6a1aa323a58","target":"graph","created_at":"2026-05-18T01:41:11Z","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":"The chemical composition of exoplanet host stars is an important factor in understanding the formation and characteristics of their orbiting planets. The best example of this to date is the planet-metallicity correlation. Other proposed correlations are thus far less robust, in part due to uncertainty in the chemical history of stars pre- and post-planet formation. Binary host stars of similar type present an opportunity to isolate the effects of planets on host star abundances. Here we present a differential elemental abundance analysis of the XO-2 stellar binary, in which both G9 stars host ","authors_text":"Carnegie Origins Fellow), Johanna K. Teske (Carnegie DTM/OCIW, Katia Cunha (Steward Observatory, Luan Ghezzi (Harvard SAO), Maria Bergemann (MPIA), Observatorio Nacional), Simon C. Schuler (University of Tampa), University of Arizona, Verne V. Smith (NOAO)","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-09T15:07:49Z","title":"Abundance Differences Between Exoplanet Binary Host Stars XO-2N and XO-2S -- Dependence on Stellar Parameters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.02167","kind":"arxiv","version":2},"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:c701af42df8542b8c3b89aa1a86cfa4cbfef95b56195db26aadf4eeccacac822","target":"record","created_at":"2026-05-18T01:41:11Z","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":"4b5c45f64c6a8d5aec4b3dccee35bcabc1250e6a8f96e73a2158342965239e1e","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-09T15:07:49Z","title_canon_sha256":"bb60769d03d5e0a0a1a3e318f1b0034d8cc5395eb3c58108f6338f7dde492b6a"},"schema_version":"1.0","source":{"id":"1501.02167","kind":"arxiv","version":2}},"canonical_sha256":"6b28ba01e36a16350735fe0963b2da8f3d1a4cc993a0087c6c685b939e1d8e1e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6b28ba01e36a16350735fe0963b2da8f3d1a4cc993a0087c6c685b939e1d8e1e","first_computed_at":"2026-05-18T01:41:11.928616Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:11.928616Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7+E4Kaz3a6zxH12ilOwDKyFa6KGhlahLk3QOzeTLXuPZAdjysa7j2EVJDUx9Msm1i289X8GhJr+opsWhzIQzCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:11.929136Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.02167","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c701af42df8542b8c3b89aa1a86cfa4cbfef95b56195db26aadf4eeccacac822","sha256:a56a7799468abd9dd7d7c891197da86d3617fe06b76381746a97d6a1aa323a58"],"state_sha256":"837786507c035d0f9e3708076ad25976e18029a72f54e0f3281b6f07a8b64582"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QmA1oZFlEMz9MvNKDgU2+8pBAbyhZ/YzTNet/OrAmGNhWW5sojuJ+yBg/Q3d7+zbJUbWuQW5M6voGMASBNwPBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T11:56:48.405661Z","bundle_sha256":"9238db1478cd81f03ee722455370e6fed675dfba8b336d7acbe595d40b5ecad7"}}