Kavli Affiliate: Richard Kessler
| First 5 Authors: Richard Kessler, Rebekah Hounsell, Bhavin Joshi, David Rubin, Masao Sako
| Summary:
Within the next few years, the upcoming Nancy Grace Roman Space Telescope
will be gathering data for the High Latitude Time Domain Survey (HLTDS) that
will be used to significantly improve the Type Ia supernova measurement of the
dark energy equation of state parameters w0 and wa. Here we generate a
catalog-level simulation of the in-guide strategy recommended by the HLTDS
definition committee, and determine dark energy parameter constraints using a
detailed analysis that includes light curve fitting, photometric redshifts and
classification, BEAMS formalism, systematic uncertainties, and cosmology
fitting. After analysis and selection requirements, the sample includes 10,000
Roman SNe Ia that we combine with 4,500 events from LSST. The resulting dark
energy figure of merit is well above the NASA mission requirement of 326, with
the caveat that SN Ia model training systematics have not been included.
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