The files HC5N.txt and HC7N.txt are slightly reduced files 
generated by spfit for the corresponding isotopolog. The files are text files.
The complete files as well as line, parameter, and other files are available under

https://cdms.astro.uni-koeln.de/classic/predictions/daten/HC5N/
and 
https://cdms.astro.uni-koeln.de/classic/predictions/daten/HC7N/


The first line is a title line; the second line gives basic informations on the fit;
the third non-empty line is the header for the line list:
# indicates the number of the line, 
1 or 2 upper and 1 or 2 lower state quanta are next (J for all lines, F for the present lines), 
followed by observed frequency, calculated frequency, residual obs. - calc., and 
the experimental uncertainty. All values are in units of megahertz.

The lines are grouped according to the sources, separated by empty lines. 

In the case of HC5N, the first group of lines is from Alexander et al. (Ref. 15); 
the second group of lines is from Winnewisser et al. (Ref. 17); 
the third group of lines is from Bizzocchi et al. (Ref. 18); 
the fourth group of lines is from the present work.

In the case of HC5N, the first group of lines is from the present work; 
the second group of lines is from McCarthy et al. (Ref. 20); 
the third group of lines is from Kirby et al. (Ref. 19); 
the fourth group of lines is from Bizzocchi and Degli Esposti (Ref. 21).

A list of parameter codes, parameter names, and parameter values with uncertainties in units 
of megahertz follow. Parameter values with uncertainty of 0 were kept fixed in the fit. 
The fits are converged as indicated by the zero changes in the parameter values. 

The correlation coefficients follow after microwave average deviation, microwave rms, 
and rms error.