{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:QISTUTH6DYO57XC77UHVKLIJOK","short_pith_number":"pith:QISTUTH6","canonical_record":{"source":{"id":"1007.4850","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-07-27T23:40:16Z","cross_cats_sorted":[],"title_canon_sha256":"a1434e0a49ed2e2bfbcc5599f3c4f2e13f64ac93f009c555e06c7f91c30090b0","abstract_canon_sha256":"819ab46e598fa94fe69497e3303761104a4420777684fabffe71fccb541cb7a0"},"schema_version":"1.0"},"canonical_sha256":"82253a4cfe1e1ddfdc5ffd0f552d09728159f2931d3faa54ab3b81a4aea8a2fd","source":{"kind":"arxiv","id":"1007.4850","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.4850","created_at":"2026-05-18T02:06:09Z"},{"alias_kind":"arxiv_version","alias_value":"1007.4850v2","created_at":"2026-05-18T02:06:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.4850","created_at":"2026-05-18T02:06:09Z"},{"alias_kind":"pith_short_12","alias_value":"QISTUTH6DYO5","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"QISTUTH6DYO57XC7","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"QISTUTH6","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:QISTUTH6DYO57XC77UHVKLIJOK","target":"record","payload":{"canonical_record":{"source":{"id":"1007.4850","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-07-27T23:40:16Z","cross_cats_sorted":[],"title_canon_sha256":"a1434e0a49ed2e2bfbcc5599f3c4f2e13f64ac93f009c555e06c7f91c30090b0","abstract_canon_sha256":"819ab46e598fa94fe69497e3303761104a4420777684fabffe71fccb541cb7a0"},"schema_version":"1.0"},"canonical_sha256":"82253a4cfe1e1ddfdc5ffd0f552d09728159f2931d3faa54ab3b81a4aea8a2fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:09.524265Z","signature_b64":"wEWAOX2QgBaK0zr448Phu38A8S28L7J5vYJo4cq448xl+TCJy0tgKYbqaEZxgbtU8nBMxbn1KkzWtyZCNLgXDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82253a4cfe1e1ddfdc5ffd0f552d09728159f2931d3faa54ab3b81a4aea8a2fd","last_reissued_at":"2026-05-18T02:06:09.523618Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:09.523618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.4850","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":"2026-05-18T02:06:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1dO/mANxY/nq3DB3HTR+HeVx+KxHzzh9uC1WCDpCN2PfhwWgKhJmOoOJHnK0vn3RiJ4X44eGJVqFUvdelVNpCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T10:12:56.200528Z"},"content_sha256":"feece48dd7895634417b6598aa80b7e1cea560424016c016debdf28637e4ef4a","schema_version":"1.0","event_id":"sha256:feece48dd7895634417b6598aa80b7e1cea560424016c016debdf28637e4ef4a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:QISTUTH6DYO57XC77UHVKLIJOK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. W. Howard, B. B\\'eky, B. Sato, D. A. Fischer, D. D. Sasselov, D. W. Latham, G. \\'A. Bakos, G. A. Esquerdo, G. F\\\"uresz, G. Kov\\'acs, G. Perumpilly, G. Torres, G. W. Marcy, I. Papp, J. A. Johnson, J. D. Hartman, J. L\\'az\\'ar, L. A. Buchhave, M. Everett, P. S\\'ari, R. P. Stefanik, R. W. Noyes, Z. Csubry","submitted_at":"2010-07-27T23:40:16Z","abstract_excerpt":"We report the discovery of two new transiting extrasolar planets. HAT-P-18b orbits the V=12.759 K2 dwarf star GSC 2594-00646, with a period P=5.508023+-0.000006 d, transit epoch Tc=2454715.02174+-0.00020 (BJD), and transit duration 0.1131+-0.0009 d. The host star has a mass of 0.77+-0.03 Msun, radius of 0.75+-0.04 Rsun, effective temperature 4803+-80 K, and metallicity [Fe/H]=+0.10+-0.08. The planetary companion has a mass of 0.197+-0.013 Mjup, and radius of 0.995+-0.052 Rjup yielding a mean density of 0.25+-0.04 g cm-3. HAT-P-19b orbits the V=12.901 K1 dwarf star GSC 2283-00589, with a period"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4850","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":"2026-05-18T02:06:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"02zTWDAYyRfwJmUM1eqw5fdAkDK7aaLb8C9k9exjxS2d8SgzO20czEOGuDzUwfzqtA3evmKWpUjlCIMnhRR1Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T10:12:56.200870Z"},"content_sha256":"b8b44fc5398b84ab1fddb9ccf518167b752153a364ccd9d43eae410202f7cee9","schema_version":"1.0","event_id":"sha256:b8b44fc5398b84ab1fddb9ccf518167b752153a364ccd9d43eae410202f7cee9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QISTUTH6DYO57XC77UHVKLIJOK/bundle.json","state_url":"https://pith.science/pith/QISTUTH6DYO57XC77UHVKLIJOK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QISTUTH6DYO57XC77UHVKLIJOK/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":"2026-06-08T10:12:56Z","links":{"resolver":"https://pith.science/pith/QISTUTH6DYO57XC77UHVKLIJOK","bundle":"https://pith.science/pith/QISTUTH6DYO57XC77UHVKLIJOK/bundle.json","state":"https://pith.science/pith/QISTUTH6DYO57XC77UHVKLIJOK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QISTUTH6DYO57XC77UHVKLIJOK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:QISTUTH6DYO57XC77UHVKLIJOK","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":"819ab46e598fa94fe69497e3303761104a4420777684fabffe71fccb541cb7a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-07-27T23:40:16Z","title_canon_sha256":"a1434e0a49ed2e2bfbcc5599f3c4f2e13f64ac93f009c555e06c7f91c30090b0"},"schema_version":"1.0","source":{"id":"1007.4850","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.4850","created_at":"2026-05-18T02:06:09Z"},{"alias_kind":"arxiv_version","alias_value":"1007.4850v2","created_at":"2026-05-18T02:06:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.4850","created_at":"2026-05-18T02:06:09Z"},{"alias_kind":"pith_short_12","alias_value":"QISTUTH6DYO5","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"QISTUTH6DYO57XC7","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"QISTUTH6","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:b8b44fc5398b84ab1fddb9ccf518167b752153a364ccd9d43eae410202f7cee9","target":"graph","created_at":"2026-05-18T02:06:09Z","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 report the discovery of two new transiting extrasolar planets. HAT-P-18b orbits the V=12.759 K2 dwarf star GSC 2594-00646, with a period P=5.508023+-0.000006 d, transit epoch Tc=2454715.02174+-0.00020 (BJD), and transit duration 0.1131+-0.0009 d. The host star has a mass of 0.77+-0.03 Msun, radius of 0.75+-0.04 Rsun, effective temperature 4803+-80 K, and metallicity [Fe/H]=+0.10+-0.08. The planetary companion has a mass of 0.197+-0.013 Mjup, and radius of 0.995+-0.052 Rjup yielding a mean density of 0.25+-0.04 g cm-3. HAT-P-19b orbits the V=12.901 K1 dwarf star GSC 2283-00589, with a period","authors_text":"A. W. Howard, B. B\\'eky, B. Sato, D. A. Fischer, D. D. Sasselov, D. W. Latham, G. \\'A. Bakos, G. A. Esquerdo, G. F\\\"uresz, G. Kov\\'acs, G. Perumpilly, G. Torres, G. W. Marcy, I. Papp, J. A. Johnson, J. D. Hartman, J. L\\'az\\'ar, L. A. Buchhave, M. Everett, P. S\\'ari, R. P. Stefanik, R. W. Noyes, Z. Csubry","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-07-27T23:40:16Z","title":"HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4850","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:feece48dd7895634417b6598aa80b7e1cea560424016c016debdf28637e4ef4a","target":"record","created_at":"2026-05-18T02:06:09Z","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":"819ab46e598fa94fe69497e3303761104a4420777684fabffe71fccb541cb7a0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2010-07-27T23:40:16Z","title_canon_sha256":"a1434e0a49ed2e2bfbcc5599f3c4f2e13f64ac93f009c555e06c7f91c30090b0"},"schema_version":"1.0","source":{"id":"1007.4850","kind":"arxiv","version":2}},"canonical_sha256":"82253a4cfe1e1ddfdc5ffd0f552d09728159f2931d3faa54ab3b81a4aea8a2fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"82253a4cfe1e1ddfdc5ffd0f552d09728159f2931d3faa54ab3b81a4aea8a2fd","first_computed_at":"2026-05-18T02:06:09.523618Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:06:09.523618Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wEWAOX2QgBaK0zr448Phu38A8S28L7J5vYJo4cq448xl+TCJy0tgKYbqaEZxgbtU8nBMxbn1KkzWtyZCNLgXDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:06:09.524265Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.4850","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:feece48dd7895634417b6598aa80b7e1cea560424016c016debdf28637e4ef4a","sha256:b8b44fc5398b84ab1fddb9ccf518167b752153a364ccd9d43eae410202f7cee9"],"state_sha256":"6b2e99b51cead86b423d0090a7c4b63dbba68c00a95b5adbf47df821d704e1b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BbS1CVhZhaSjqxRPi+ZMxTNivBZNyDFhcdrKjqhsraoRzGa9lsIQu+pgSXJbMGaBp+axhCCIKTZCKARDwZVIAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T10:12:56.202693Z","bundle_sha256":"d39eb15ec76d4a52b61a33b34804e98a248ad6f68728c0ed9140da470f080ab6"}}