12:00–1:00 pm ERC 401
Claire-Alice Hebert (Stanford University) "Cosmic shear, or atmosphere? Testing assumptions about point-spread functions"
The era of precision cosmology with the Rubin Observatory LSST is approaching! With billions of galaxy images at our disposal, cosmic shear analyses with Rubin data will have the potential for extremely precise measurements of the nature of dark energy. However, a concerted effort to understand, quantify, and account for a myriad of systematic effects is necessary to ensure these measurements are accurate. My talk will focus on our efforts to understand and minimize the impact of one such effect, the atmospheric PSF. Specifically, our goal is to realistically simulate and quantify the expected spatial correlations — given the larger field of view and shorter exposure time compared to previous galaxy surveys — using information about the dynamic environment at Rubin Observatory.
