Simulated Data

With the launch of the Nancy Grace Roman Space Telescope in 2027, simulations of the HLTDS are required for developing the SOC, SSC, and PIT software in order to test current and future SNe Ia cosmological analysis methods.

The simulations for Roman will be used to create a mock survey that can be used by the community in ‘real time’. This simulated Roman WFI data will also be used by the community for pre-launch preparation and can be tested, monitored, and verified upon collection.

We propose to simulate the following:

  • Simulate realistic catalogs of SNe Ia and non-SNe Ia for infrastructure development

    • In each WFI band, we will simulate approximately 10^6 light curves and prism spectra for SNe Ia and non-SNe Ia

    • The software that will be used for these simulations is called ANAlysis (SNANA)

    • The SNe Ia data will be created by using a collection of realistic cosmological properties (Spectral Energy Distributions, astrophysical rates, instrument noise, host galaxy properties, and selection effects)

  • Simulate pixel images to test photometry and calibration

    • For our simulated Roman data, we plan for at least 20% of the data to be at the pixel level for 7/8 WFI imaging bands

    • For our simulations, the images will include specified objects such as noise (sky and instrument), galaxies, and transients

  • Test spectral extraction by simulating 2D spectra and 3D datacubes

    • The 3D datacubes will be created from transient information from our realistic simulated catalogs of SNe Ia and non-SNe Ia

    • We will use the 3D datacubes to then generate the 2D and 1D spectra

    • The time and area that the simulations will cover will be over two years and be around the same area as done for the simulated photometry

  • Optimize the design of the HLTDS using catalog simulations

    • We will work with other collaborations (Roman Project, SOC, and SSC) to provide catalog level simulations for different HLTDS designs