Gain. › Forums › Variable Stars › Calculation of SNR › Gain. 19 October 2020 at 9:36 pm #583263 Dr Paul LeylandParticipant I’m trying to find out how Astrometrica estimates the gain, G (e-/ADU) Ah. The photometry I do, which hardly ever uses Astrometrica, takes the gain as a given constant which I have evaluated for the specific camera which I use.
