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The Nancy Grace Roman Space Telescope's (RST) Wide Field Imager (WFI) isequipped with a slitless prism that can be used for spectroscopic discovery andfollow-up of explosive transients at high redshift as part of its High LatitudeTime Domain Survey. This is new and unique spectroscopic capability, not onlyfor its original purpose for cosmology, but also for other types of explosivetransients. This white paper is intended to help make this new capability moreclear to the community. The depth of the RST prism compared to ground-basedspectrographs is explored, showing that the RST prism will be unrivaled in theobserver-frame NIR. The influence of the selected sky locations on the speedand homogeneity of a RST prism survey is also estimated. This unique newcapability should be considered when balancing the HLTDS time devoted tocadenced imaging and spectroscopy.

Roman CCS White Paper: Balanced Prism Plus Filter Cadence in the High Latitude Time Domain Survey Core Community Survey