SLIM's developed at the Space Telescope European Coordinating Facility (ST-ECF) and's a slitless spectroscopy simulator programme created to produce simulated ACS grism and prism images. It's written in Python programming language and covers all spectral elements available in the Advanced Camera for Surveys (ACS) installed on-board the Hubble Space Telescope (HST). It was created to generate data that's both geometrically and photometrically realistic and's appropriate to the slitless spectrosco… (More on Slim)