OK Guys, you have got me further than I have been before down this road.
The image shows where I'm up to.
I have what I think is a good spectra (?) of Beta Grus and have V-spec to give the intensity graph. Included is the zero dispersion image (star).
Can anybody identify some lines to help me callibrate?
Any, I say, any help is greatly appreciated.
Please forgive my ignorance.