› Forums › Spectroscopy › Possible nova in M31 › single digit SNR
17 September 2019 at 6:16 pm
#581379
![](https://britastro.org/wp-content/uploads/2016/11/picture-146-1478110706-80x80.jpg)
Participant
Well H alpha is there with the right sort of width for a nova (FWHM ~2500km/s) and probably H beta with similar width but the bright sky background has dragged the SNR down to single digits so nothing else is showing above the noise.