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fekblor, zfekblor, bfekblor, zbfekblor: Fe K$\beta $ line at high resolution

A four Lorentzian approximation to the line profile of Fe K$\beta $ from neutral material. The energies, widths, and relative amplitudes for the Lorentzians are taken from Holzer et al (1997) and are:

Energy (eV) Width (eV) Amplitude  
7046.90 14.17 0.301  
7057.21 3.12 0.279  
7058.36 1.97 0.241  
7054.75 6.38 0.179  

The only parameter for fekblor is the normalization (the total photons/cm$^2$/s in the line) while zfekblor has an additional parameter for the redshift.

bfekblor velocity-broadens the fekblor model (thus making it the sum of 4 Voigt profiles) with the parameter being the velocity $\sigma$ in km/s. zbfekblor adds an additional parameter for the redshift.