{"paper":{"title":"High Cadence Near Infrared Timing Observations of Extrasolar Planets: I. GJ 436b and XO-1b","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"2), (2) European Southern Observatory, 3), (3) Specola Vaticana, (4) Universidad de Concepcion), C. Caceres (1, C. Melo (2), D. Minniti (1, D. Naef (2), E. Mason (2), F. Selman (2), G. Pietrzynski (4) ((1) Pontificia Universidad Catolica de Chile, V.D. Ivanov (2)","submitted_at":"2009-05-11T22:09:58Z","abstract_excerpt":"Currently the only technique sensitive to Earth mass planets around nearby stars (that are too close for microlensing) is the monitoring of the transit time variations of the transiting extrasolar planets. We search for additional planets in the systems of the hot Neptune GJ 436b, and the hot-Jupiter XO-1b, using high cadence observations in the J and Ks bands. New high-precision transit timing measurements are reported: GJ 436b Tc = 2454238.47898 \\pm 0.00046 HJD; XO-1b Tc(A) = 2454218.83331 \\pm 0.00114 HJD, Tc(B) = 2454222.77539 \\pm 0.00036 HJD, Tc(C) = 2454222.77597 \\pm 0.00039 HJD, Tc(D) = "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1728","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"}