{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:2ATDWPBBUTKHVAYE5NAI4U724S","short_pith_number":"pith:2ATDWPBB","schema_version":"1.0","canonical_sha256":"d0263b3c21a4d47a8304eb408e53fae4b3337eab88476b6bfecc4f7f77390916","source":{"kind":"arxiv","id":"1902.00001","version":1},"attestation_state":"computed","paper":{"title":"Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) - II. A broadened sodium feature on the ultra-hot giant WASP-76b","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"1), (10) Laboratoire d'Astrophysique, (11) European Southern Observatory, (2) Leiden Observatory, (3) Space Research Institute, (4) Anton Pannekoek Institute for Astronomy, 5), (5) CHEOPS Fellow, (6) Depto. Astrof\\'isica, (7) Department of Physics, (8) Universidad de Concepci\\'on, 9), (9) Center for Space, A. Deline (1), AT, Austrian Academy of Sciences, A. Wyttenbach (2), B. Lavie (1, Centro de Astrobiolog\\'ia (INTA-CSIC), C. Fisher (9), CH, CL, CL), C. Lovis (1), C. Melo (11), D. Barrado (6), D. Bayliss (7), D. Ehrenreich (1), Departamento de Astronom\\'ia, D. S\\'egrasan (1), \\'Ecole polytechnique f\\'ed\\'erale de Lausanne (EPFL), ES, F. Pepe (1), Habitability, H. M. Cegla (1, J. V. Seidel (1), K. Heng (9), Leiden University, L. Pino (4), M. Lendl (3, N. Astudillo-Defru (8), NL, R. Allart (1), R. Joseph (10), SNSF NCCR-PlanetS, S. Udry (1) ((1) Observatoire astronomique de l'Universit\\'e de Gen\\`eve, UK, University of Amsterdam, University of Bern, University of Warwick, V. Bourrier (1)","submitted_at":"2019-01-30T19:00:04Z","abstract_excerpt":"High-resolution optical spectroscopy is a powerful tool to characterise exoplanetary atmospheres from the ground. The sodium D lines, with their large cross sections, are especially suited to study the upper layers of atmospheres in this context. We report on the results from HEARTS, a spectroscopic survey of exoplanet atmospheres, performing a comparative study of hot gas giants to determine the effects of stellar irradiation. In this second installation of the series, we highlight the detection of neutral sodium on the ultra-hot giant WASP-76b. We observed three transits of the planet using "},"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":"1902.00001","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-30T19:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"a3f9752b22a18254a005bab9eb03b5d8c6b378397dc09ecbffd907a33f78f7fd","abstract_canon_sha256":"8d708028f8d1eab03e8b8db0265cd7a5e101e76a0c649d514e85446975af3b1c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:08.276299Z","signature_b64":"MmcI5fiU/o8L5CZhjbuUTmto8nZkTy4v1dDdVBjMmZJwXGnbY+gsj0GuxZ4QtRs/f/t1/ekxhyt++Yb4XgX9Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d0263b3c21a4d47a8304eb408e53fae4b3337eab88476b6bfecc4f7f77390916","last_reissued_at":"2026-05-17T23:50:08.275783Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:08.275783Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) - II. A broadened sodium feature on the ultra-hot giant WASP-76b","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"1), (10) Laboratoire d'Astrophysique, (11) European Southern Observatory, (2) Leiden Observatory, (3) Space Research Institute, (4) Anton Pannekoek Institute for Astronomy, 5), (5) CHEOPS Fellow, (6) Depto. Astrof\\'isica, (7) Department of Physics, (8) Universidad de Concepci\\'on, 9), (9) Center for Space, A. Deline (1), AT, Austrian Academy of Sciences, A. Wyttenbach (2), B. Lavie (1, Centro de Astrobiolog\\'ia (INTA-CSIC), C. Fisher (9), CH, CL, CL), C. Lovis (1), C. Melo (11), D. Barrado (6), D. Bayliss (7), D. Ehrenreich (1), Departamento de Astronom\\'ia, D. S\\'egrasan (1), \\'Ecole polytechnique f\\'ed\\'erale de Lausanne (EPFL), ES, F. Pepe (1), Habitability, H. M. Cegla (1, J. V. Seidel (1), K. Heng (9), Leiden University, L. Pino (4), M. Lendl (3, N. Astudillo-Defru (8), NL, R. Allart (1), R. Joseph (10), SNSF NCCR-PlanetS, S. Udry (1) ((1) Observatoire astronomique de l'Universit\\'e de Gen\\`eve, UK, University of Amsterdam, University of Bern, University of Warwick, V. Bourrier (1)","submitted_at":"2019-01-30T19:00:04Z","abstract_excerpt":"High-resolution optical spectroscopy is a powerful tool to characterise exoplanetary atmospheres from the ground. The sodium D lines, with their large cross sections, are especially suited to study the upper layers of atmospheres in this context. We report on the results from HEARTS, a spectroscopic survey of exoplanet atmospheres, performing a comparative study of hot gas giants to determine the effects of stellar irradiation. In this second installation of the series, we highlight the detection of neutral sodium on the ultra-hot giant WASP-76b. We observed three transits of the planet using "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.00001","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":"1902.00001","created_at":"2026-05-17T23:50:08.275874+00:00"},{"alias_kind":"arxiv_version","alias_value":"1902.00001v1","created_at":"2026-05-17T23:50:08.275874+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.00001","created_at":"2026-05-17T23:50:08.275874+00:00"},{"alias_kind":"pith_short_12","alias_value":"2ATDWPBBUTKH","created_at":"2026-05-18T12:33:07.085635+00:00"},{"alias_kind":"pith_short_16","alias_value":"2ATDWPBBUTKHVAYE","created_at":"2026-05-18T12:33:07.085635+00:00"},{"alias_kind":"pith_short_8","alias_value":"2ATDWPBB","created_at":"2026-05-18T12:33:07.085635+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S","json":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S.json","graph_json":"https://pith.science/api/pith-number/2ATDWPBBUTKHVAYE5NAI4U724S/graph.json","events_json":"https://pith.science/api/pith-number/2ATDWPBBUTKHVAYE5NAI4U724S/events.json","paper":"https://pith.science/paper/2ATDWPBB"},"agent_actions":{"view_html":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S","download_json":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S.json","view_paper":"https://pith.science/paper/2ATDWPBB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1902.00001&json=true","fetch_graph":"https://pith.science/api/pith-number/2ATDWPBBUTKHVAYE5NAI4U724S/graph.json","fetch_events":"https://pith.science/api/pith-number/2ATDWPBBUTKHVAYE5NAI4U724S/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S/action/storage_attestation","attest_author":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S/action/author_attestation","sign_citation":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S/action/citation_signature","submit_replication":"https://pith.science/pith/2ATDWPBBUTKHVAYE5NAI4U724S/action/replication_record"}},"created_at":"2026-05-17T23:50:08.275874+00:00","updated_at":"2026-05-17T23:50:08.275874+00:00"}