› Forums › Spectroscopy › Anomolous absorption line? › one sub
25 February 2021 at 7:23 pm
#583894
![](https://britastro.org/wp-content/uploads/2016/12/picture-2960-1481671950-80x80.jpg)
Participant
so looking at one sub just now – its gone!
I looked back at the flats from last time and no obvious dust… I also did a ‘binning’ at the same level as the spectrum and no obvious defect in the resulting plot
Kevin