Abstract We present a new set of 35 transit light curves of the hot Jupiter WASP-43 b, obtained through the SPEARNET network. These datasets were analyzed together with previously published ground-based observations, as well as space-based data from TESS, Hubble Space Telescope (HST), and JWST, to refine the planetary parameters of WASP-43 b. A total of 188 midtransit times, measured with TransitFit , were analyzed for potential timing variations. The transit timing variations do not show any significant evidence of orbital decay. Atmospheric retrievals using HST/WFC3 G141 transmission spectra suggest that higher-temperature solutions are associated with higher water abundances. However, when these data are combined with observations from ground-based telescopes, TESS, and JWST, the increased modeling complexity across the broad wavelength baseline presents significant challenges for atmospheric characterization. These results highlight that high-precision, multi-instrument datasets will be necessary to break existing degeneracies in the atmospheric modeling of this target in the future.
A-thano et al. (Fri,) studied this question.