Measuring emission line flux

Forums Spectroscopy Learning to measure eqw of spectral lines Measuring emission line flux

David Boyd

Following on from Robin’s comments above, the plots below show how the EW, continuum level and flux of the H-alpha emission line of AG Peg have varied over the past couple of years. Clearly what the continuum is doing has a big influence on how you interpret changes in the EW as an indication of how the line flux is varying.