TrExoLiSTS: Transiting Exoplanets List of Space Telescope Spectroscopy

We present the STScI WFC3 project webpage, Transiting Exoplanets List of Space Telescope Spectroscopy (TrExoLiSTS). It tabulates existing observations of transiting exoplanet atmospheres, available in the MAST archive made with HST WFC3 using the stare or spatial scan mode. A parallel page is available for all instruments aboard JWST using the spectral Time Series Observation (TSO) mode. The webpages include observations obtained during primary transits, secondary eclipses and phase curves. TrExoLiSTS enables quick identification of complementarity between programs in terms of targets and or wavelength coverage, which can help to simplify proposal preparation, and to eliminate duplicate or redundant efforts. Reference for the quality of the HST WFC3 visits taken more than 1.5 years ago are made available via diagrams of the direct image, white light curve, and drift of the spectral time series across the detector. Future improvements to the webpage will include expanding the program query to other HST instruments and references for the quality of JWST visits.