Effortless reconstructs Roman images 50–60× faster than Imcom; one calibrated single-image output beats ~6 coadded Imcom images on ideal point-source moments.
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Filter-substrate refraction causes dominant lateral shifts yielding 0.3-0.4% PSF size and ellipticity residuals across most Roman bands that exceed weak lensing requirements by an order of magnitude, while longitudinal defocus shifts remain negligible.
citing papers explorer
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Efficient Optimal Image Reconstruction for the Nancy Grace Roman Space Telescope and Beyond: I. First Results with {\sc Effortless}
Effortless reconstructs Roman images 50–60× faster than Imcom; one calibrated single-image output beats ~6 coadded Imcom images on ideal point-source moments.
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Modeling the impact of filter-substrate refraction in the Roman point spread function
Filter-substrate refraction causes dominant lateral shifts yielding 0.3-0.4% PSF size and ellipticity residuals across most Roman bands that exceed weak lensing requirements by an order of magnitude, while longitudinal defocus shifts remain negligible.
- Charge diffusion and modulation transfer function in a Nancy Grace Roman Space Telescope detector