› Forums › Variable Stars › Calculation of SNR › Gain.
19 October 2020 at 9:36 pm
#583263
![](https://britastro.org/wp-content/uploads/2018/09/picture-8621-1537263177-80x80.jpg)
Participant
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.