The Twinkles Simulation


Fig. 1: - Simulations of gravitational lensing in galaxies using CatSim, GalSim, and PhoSim. Left: images of sources without lensing effects. Middle: lensed images with the images of lenses. Right: involving noise and PSF using PhoSim.

I am a member of the LSST Dark Energy Science Collaboration (LSST-DESC), and working on simulations with the LSST-DESC strong lensing work group. The Twinkles project, which is a simulation of galaxy scale lensing systems with lensed supernovas and lensed quasars, is one of my focus areas. My interests and duties are: (a) Using CatSim and GalSim to produce the images of sources, line of sight galaxies and lenses. (b) Adding mass distributions of lenses and applying ray-tracing to produce multiple lensed images. (c) Adding PSF and photon noise using a photon ray-tracing code (PhoSim) to make the lensed images realistic. The purpose of this simulation is to test a number of software instruments that will be applied to make high accuracy cosmological measurements of type Ia supernovae and strong gravitational lensing time delays with LSST data, e.g., the pipeline for using strong lensing time delays to constrain the equation of state for dark energy. The Twinkles project is highly under-developing, please you are interested in it, please click here for more details.

More coming soon.