{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:TJXOB4MGHMH2U3VWYW4AKQANQL","short_pith_number":"pith:TJXOB4MG","schema_version":"1.0","canonical_sha256":"9a6ee0f1863b0faa6eb6c5b805400d82fbf6a5c64e06b4688df151f2b1b1c7b3","source":{"kind":"arxiv","id":"1501.06227","version":1},"attestation_state":"computed","paper":{"title":"An ancient extrasolar system with five sub-Earth-size planets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. Miglio, A. Sozzetti, C. Baranec, C. J. Burke, C. Karoff, C. Van Laerhoven, D. A. Fischer, D. Huber, D. Ragozzine, D. Stello, E. V. Quintana, G. R. Davies, G. W. Marcy, H. Isaacson, H. Kjeldsen, J. Christensen-Dalsgaard, J. F. Rowe, J. J. Swift, J. M. Brewer, M. Lundkvist, M. N. Lund, N. C. Santos, N. M. Law, R. Handberg, R. Kolbl, R. Riddle, S. Basu, S. D. Kawaler, S. G. Sousa, S. Hekker, T. Arentoft, T. Barclay, T. L. Campante, T. R. Bedding, T. R. White, T. S. Metcalfe, V. Silva Aguirre, V. Zh. Adibekyan, W. Cochran, W. J. Chaplin, Y. P. Elsworth","submitted_at":"2015-01-26T01:25:29Z","abstract_excerpt":"The chemical composition of stars hosting small exoplanets (with radii less than four Earth radii) appears to be more diverse than that of gas-giant hosts, which tend to be metal-rich. This implies that small, including Earth-size, planets may have readily formed at earlier epochs in the Universe's history when metals were more scarce. We report Kepler spacecraft observations of Kepler-444, a metal-poor Sun-like star from the old population of the Galactic thick disk and the host to a compact system of five transiting planets with sizes between those of Mercury and Venus. We validate this syst"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1501.06227","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-01-26T01:25:29Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"3a2b0eba02ecbcf0e97031159ff1cce700790c652f6850af6b267764ea13db1d","abstract_canon_sha256":"b8c177af1c9abd8bffa946320831c1be129cb70eebd054035d8f21bb1a5a41db"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:28:39.615044Z","signature_b64":"2HLpm0M1l7/GYf2LNNTsUTcWXah2Fgzha+ot77qoNSN4xCyiBXLMnqYYb0QDK+BS1Cn/DEtPkAYpCV4jopiPAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a6ee0f1863b0faa6eb6c5b805400d82fbf6a5c64e06b4688df151f2b1b1c7b3","last_reissued_at":"2026-05-18T02:28:39.614368Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:28:39.614368Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"An ancient extrasolar system with five sub-Earth-size planets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. Miglio, A. Sozzetti, C. Baranec, C. J. Burke, C. Karoff, C. Van Laerhoven, D. A. Fischer, D. Huber, D. Ragozzine, D. Stello, E. V. Quintana, G. R. Davies, G. W. Marcy, H. Isaacson, H. Kjeldsen, J. Christensen-Dalsgaard, J. F. Rowe, J. J. Swift, J. M. Brewer, M. Lundkvist, M. N. Lund, N. C. Santos, N. M. Law, R. Handberg, R. Kolbl, R. Riddle, S. Basu, S. D. Kawaler, S. G. Sousa, S. Hekker, T. Arentoft, T. Barclay, T. L. Campante, T. R. Bedding, T. R. White, T. S. Metcalfe, V. Silva Aguirre, V. Zh. Adibekyan, W. Cochran, W. J. Chaplin, Y. P. Elsworth","submitted_at":"2015-01-26T01:25:29Z","abstract_excerpt":"The chemical composition of stars hosting small exoplanets (with radii less than four Earth radii) appears to be more diverse than that of gas-giant hosts, which tend to be metal-rich. This implies that small, including Earth-size, planets may have readily formed at earlier epochs in the Universe's history when metals were more scarce. We report Kepler spacecraft observations of Kepler-444, a metal-poor Sun-like star from the old population of the Galactic thick disk and the host to a compact system of five transiting planets with sizes between those of Mercury and Venus. We validate this syst"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.06227","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1501.06227","created_at":"2026-05-18T02:28:39.614457+00:00"},{"alias_kind":"arxiv_version","alias_value":"1501.06227v1","created_at":"2026-05-18T02:28:39.614457+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.06227","created_at":"2026-05-18T02:28:39.614457+00:00"},{"alias_kind":"pith_short_12","alias_value":"TJXOB4MGHMH2","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_16","alias_value":"TJXOB4MGHMH2U3VW","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_8","alias_value":"TJXOB4MG","created_at":"2026-05-18T12:29:42.218222+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.23515","citing_title":"Ensemble asteroseismology: An ensemble approach to detecting signatures of solar-like oscillations in K-dwarfs","ref_index":23,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL","json":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL.json","graph_json":"https://pith.science/api/pith-number/TJXOB4MGHMH2U3VWYW4AKQANQL/graph.json","events_json":"https://pith.science/api/pith-number/TJXOB4MGHMH2U3VWYW4AKQANQL/events.json","paper":"https://pith.science/paper/TJXOB4MG"},"agent_actions":{"view_html":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL","download_json":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL.json","view_paper":"https://pith.science/paper/TJXOB4MG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1501.06227&json=true","fetch_graph":"https://pith.science/api/pith-number/TJXOB4MGHMH2U3VWYW4AKQANQL/graph.json","fetch_events":"https://pith.science/api/pith-number/TJXOB4MGHMH2U3VWYW4AKQANQL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL/action/storage_attestation","attest_author":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL/action/author_attestation","sign_citation":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL/action/citation_signature","submit_replication":"https://pith.science/pith/TJXOB4MGHMH2U3VWYW4AKQANQL/action/replication_record"}},"created_at":"2026-05-18T02:28:39.614457+00:00","updated_at":"2026-05-18T02:28:39.614457+00:00"}