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# Determining a Line Flux

There are several methods that can be used to determine the flux in a line for high resolution spectra. We can

- 1) sum the counts in the region of interest
- 2) we can fit the line with a function
- 3) we can use an RMF to forward fold a model

- Region of Interest
- Profile Fitting
- Creating an RMF
- Applying an RMF