{"paper":{"title":"WASP-4b Arrived Early for the TESS Mission","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Ana Glidden, B. Wohler, C. Baxter, D. W. Latham, F. Dai, G. R. Ricker, J. D. Twicken, J. E. Rodriguez, J.-M. D\\'esert, J. M. Jenkins, J. N. Winn, J. Villasenor, K. Col\\'on, K. G. Stassun, L. G. Bouma, M. Fausnaugh, M. L. Hill, N. Guerrero, R. Vanderspek, S. R. Kane, S. Seager, T. Daylan, W. Bhatti, Z. Berta-Thompson","submitted_at":"2019-03-06T19:00:09Z","abstract_excerpt":"The Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6 $\\pm$ 11.7 seconds earlier than had been predicted, based on data stretching back to 2007. This is unlikely to be the result of a clock error, because TESS observations of other hot Jupiters (WASP-6b, 18b, and 46b) are compatible with a constant period, ruling out an 81.6-second offset at the 6.4$\\sigma$ level. The 1.3-day orbital period of WASP-4b appears to be decreasing at a rate of $\\dot{P} = -12.6 \\pm 1.2$ milliseconds per year. The apparent per"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02573","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"}