{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:YXUEPSBXVVBDSXAFICWLKK3SQG","short_pith_number":"pith:YXUEPSBX","canonical_record":{"source":{"id":"1202.5307","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-02-23T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"95d555c3665abff801d82598a0e26f1d08882d78582930ce219d5baedf607036","abstract_canon_sha256":"e1384ff71bfd5cf9468dc29cd82ee337e3478006eddd606512a2f9ce1a847c58"},"schema_version":"1.0"},"canonical_sha256":"c5e847c837ad42395c0540acb52b7281b287ef5b84efc428983ecbfc1960c000","source":{"kind":"arxiv","id":"1202.5307","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.5307","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1202.5307v2","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.5307","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"YXUEPSBXVVBD","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"YXUEPSBXVVBDSXAF","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"YXUEPSBX","created_at":"2026-05-18T12:27:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:YXUEPSBXVVBDSXAFICWLKK3SQG","target":"record","payload":{"canonical_record":{"source":{"id":"1202.5307","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-02-23T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"95d555c3665abff801d82598a0e26f1d08882d78582930ce219d5baedf607036","abstract_canon_sha256":"e1384ff71bfd5cf9468dc29cd82ee337e3478006eddd606512a2f9ce1a847c58"},"schema_version":"1.0"},"canonical_sha256":"c5e847c837ad42395c0540acb52b7281b287ef5b84efc428983ecbfc1960c000","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:20.160795Z","signature_b64":"fQ/6XE9tT9h8l7N0lq+fxnEZkwYooH0R4VOnMT0b8Fpx8wtoYd7ao0Fr0Ub0G6aEGCzJDyNsLBGc4U3t3KDeBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5e847c837ad42395c0540acb52b7281b287ef5b84efc428983ecbfc1960c000","last_reissued_at":"2026-05-18T01:58:20.160287Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:20.160287Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.5307","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":"2026-05-18T01:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ct7HWu/D/+amH9L1JiaJVyByf3uIuD9Z0gwxw5HQ+G13p19gMogoEVXJqZluppmMQ24FeDsEg0fHKg0FD5CMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:29:16.316240Z"},"content_sha256":"d8f96bfd79ef4e41a5824bf64a7272093bed67ff71d176dc4ca36f22279f970d","schema_version":"1.0","event_id":"sha256:d8f96bfd79ef4e41a5824bf64a7272093bed67ff71d176dc4ca36f22279f970d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:YXUEPSBXVVBDSXAFICWLKK3SQG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Validation of the Exoplanet Kepler-21b using PAVO/CHARA Long-Baseline Interferometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Antoine M\\'erand, Christopher D. Farrington, Daniel Huber, Gail H. Schaefer, Harold A. McAlister, Judit Sturmann, Laszlo Sturmann, Michael J. Ireland, Nils H. Turner, Peter G. Tuthill, P. J. Goldfinger, Steve B. Howell, Theo A. ten Brummelaar, Timothy R. Bedding, Timothy R. White, Vicente Maestro","submitted_at":"2012-02-23T21:00:01Z","abstract_excerpt":"We present long-baseline interferometry of the Kepler exoplanet host star HD179070 (Kepler-21) using the PAVO beam combiner at the CHARA Array. The visibility data are consistent with a single star and exclude stellar companions at separations ~1-1000 mas (~ 0.1-113 AU) and contrasts < 3.5 magnitudes. This result supports the validation of the 1.6 R_{earth} exoplanet Kepler-21b by Howell et al. (2012) and complements the constraints set by adaptive optics imaging, speckle interferometry, and radial velocity observations to rule out false-positives due to stellar companions. We conclude that lo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.5307","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":"2026-05-18T01:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3z4GgCKZ0cVpyegAfXO1yODeFutoFwztCh5c5x3nhYG2SQaVwRNlpp8yZlOz7YBQjdnDoPXjCfbB7LgoG4vBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:29:16.316932Z"},"content_sha256":"c6b532a08dcae047e4c1a1ccd903729b6e6d83ecd157065158eb5839c66c2b18","schema_version":"1.0","event_id":"sha256:c6b532a08dcae047e4c1a1ccd903729b6e6d83ecd157065158eb5839c66c2b18"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YXUEPSBXVVBDSXAFICWLKK3SQG/bundle.json","state_url":"https://pith.science/pith/YXUEPSBXVVBDSXAFICWLKK3SQG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YXUEPSBXVVBDSXAFICWLKK3SQG/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":"2026-05-30T06:29:16Z","links":{"resolver":"https://pith.science/pith/YXUEPSBXVVBDSXAFICWLKK3SQG","bundle":"https://pith.science/pith/YXUEPSBXVVBDSXAFICWLKK3SQG/bundle.json","state":"https://pith.science/pith/YXUEPSBXVVBDSXAFICWLKK3SQG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YXUEPSBXVVBDSXAFICWLKK3SQG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:YXUEPSBXVVBDSXAFICWLKK3SQG","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":"e1384ff71bfd5cf9468dc29cd82ee337e3478006eddd606512a2f9ce1a847c58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-02-23T21:00:01Z","title_canon_sha256":"95d555c3665abff801d82598a0e26f1d08882d78582930ce219d5baedf607036"},"schema_version":"1.0","source":{"id":"1202.5307","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.5307","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1202.5307v2","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.5307","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"YXUEPSBXVVBD","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"YXUEPSBXVVBDSXAF","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"YXUEPSBX","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:c6b532a08dcae047e4c1a1ccd903729b6e6d83ecd157065158eb5839c66c2b18","target":"graph","created_at":"2026-05-18T01:58:20Z","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":"We present long-baseline interferometry of the Kepler exoplanet host star HD179070 (Kepler-21) using the PAVO beam combiner at the CHARA Array. The visibility data are consistent with a single star and exclude stellar companions at separations ~1-1000 mas (~ 0.1-113 AU) and contrasts < 3.5 magnitudes. This result supports the validation of the 1.6 R_{earth} exoplanet Kepler-21b by Howell et al. (2012) and complements the constraints set by adaptive optics imaging, speckle interferometry, and radial velocity observations to rule out false-positives due to stellar companions. We conclude that lo","authors_text":"Antoine M\\'erand, Christopher D. Farrington, Daniel Huber, Gail H. Schaefer, Harold A. McAlister, Judit Sturmann, Laszlo Sturmann, Michael J. Ireland, Nils H. Turner, Peter G. Tuthill, P. J. Goldfinger, Steve B. Howell, Theo A. ten Brummelaar, Timothy R. Bedding, Timothy R. White, Vicente Maestro","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-02-23T21:00:01Z","title":"Validation of the Exoplanet Kepler-21b using PAVO/CHARA Long-Baseline Interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.5307","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:d8f96bfd79ef4e41a5824bf64a7272093bed67ff71d176dc4ca36f22279f970d","target":"record","created_at":"2026-05-18T01:58:20Z","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":"e1384ff71bfd5cf9468dc29cd82ee337e3478006eddd606512a2f9ce1a847c58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-02-23T21:00:01Z","title_canon_sha256":"95d555c3665abff801d82598a0e26f1d08882d78582930ce219d5baedf607036"},"schema_version":"1.0","source":{"id":"1202.5307","kind":"arxiv","version":2}},"canonical_sha256":"c5e847c837ad42395c0540acb52b7281b287ef5b84efc428983ecbfc1960c000","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5e847c837ad42395c0540acb52b7281b287ef5b84efc428983ecbfc1960c000","first_computed_at":"2026-05-18T01:58:20.160287Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:20.160287Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fQ/6XE9tT9h8l7N0lq+fxnEZkwYooH0R4VOnMT0b8Fpx8wtoYd7ao0Fr0Ub0G6aEGCzJDyNsLBGc4U3t3KDeBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:20.160795Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.5307","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8f96bfd79ef4e41a5824bf64a7272093bed67ff71d176dc4ca36f22279f970d","sha256:c6b532a08dcae047e4c1a1ccd903729b6e6d83ecd157065158eb5839c66c2b18"],"state_sha256":"08613ed97d783c346ca01a6dccc99960d664657cad85ede3c7093ea2c3ca0df8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GNyRBwWuJD19uhe2NiR6U66Y8usYmWqPaNFRWdtnplic78Dv/jl4nmpft+frj11gMfYDvMv0uQo/XfIfQG2lDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T06:29:16.320456Z","bundle_sha256":"1459d2cb952ad5a1059f8d0e7fcf5ac54d02e9f436876e5ccc5d60b123ce9ab1"}}