PEPSI Exposure Time Calculator v2.10 2021-12-20 The Exposure time calculator (ETC) estimates the flux from the star by using flux templates from Pickles (1998) and from Francis et al. (1991), scaling them using the V-band vega VEGA flux (Bohlin & Gilliland 2004). The flux is then adjusted by using the V-magnitude supplied, and by applying … Continue reading Exposure Time Calculator