A Fisher-matrix study of 1,000 Roman HLTDS designs finds that roughly 20% prism, 30-40% wide imaging, and the rest deep imaging is the most promising allocation, and releases covariance matrices.
Roman CCS White Paper: Optimizing the HLTDS Cadence at Fixed Depth
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abstract
The current proposal for the High Latitude Time Domain Survey (HLTDS) is two tiers (wide and deep) of multi-band imaging and prism spectroscopy with a cadence of five days (Rose et al., 2021). The five-day cadence is motivated by the desire to measure mid-redshift SNe where time dilation is modest as well as to better photometrically characterize the transients detected. This white paper does not provide a conclusion as to the best cadence for the HLTDS. Rather, it collects a set of considerations that should be used for a careful study of cadence by a future committee optimizing the Roman survey. This study should optimize the HLTDS for both SN Ia cosmology and other transient science.
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Fishing for the Optimal Roman High Latitude Time Domain Survey: Cosmological Constraints for 1,000 Possible Surveys
A Fisher-matrix study of 1,000 Roman HLTDS designs finds that roughly 20% prism, 30-40% wide imaging, and the rest deep imaging is the most promising allocation, and releases covariance matrices.