We take two spectra and subtract the two. Below is a plot of the residual as a function of exposure time:
Residual increases as exposure time increases.
Mean residual:
Std residual:
Wavelength dependent residual:
We take two spectra and subtract the two. Below is a plot of the residual as a function of exposure time:
Residual increases as exposure time increases.
Mean residual:
Std residual:
Wavelength dependent residual: