\\ Species Tag:        &   73001 & Name:& C6H
\\ Version:            &       1 & & Linear C$_6$H radical,
\\ Date:       &  Dec. 1994     & & X $^2\Pi$ states  
\\ Contributor:&  H. M. Pickett & &
\\             &                 & &
\\ Lines Listed:       &    3031 & Q(300.0)=& 30789.8127
\\ Freq. (GHz) $<$     &     825 & Q(225.0)=& 24332.8802
\\ Max. J:             &      98 & Q(150.0)=& 16565.6319
\\ LOGSTR0=            &   -10.0 & Q(75.00)=& 7871.6218
\\ LOGSTR1=            &         & Q(37.50)=& 3519.7042
\\ Isotope Corr.:      &     0.0 & Q(18.75)=& 1487.9395
\\ Egy. (cm$^{-1}$) $>$& 0.0479  & Q(9.375)=& 626.7718
\\ $\mu_a$ = & 5.9               & A=&
\\ $\mu_b$ = &                   & B=& 1391.18
\\ $\mu_c$ = &                   & C=&
\headend
\hyphenation{Gott-lieb}

The laboratory measurements of the frequency are described in J.~C.~Pearson,
~C.~A.~Gottlieb, D.~R.~Woodward, and P.~Thaddeus, 1988, Astron. Astrophys.
{\bf 189}, L13-L15, and a list of the measured lines from this work was
supplied by C.~A. Gottlieb. These lines above 140 GHz were supplemented 
with interstelllar measurents in TMC-1 at lower frequency from J.~Cernicharo,
M.~Guelin, K.~M.~Menten, and C.~M.~Walmsley, 1987, Astron. Astrophys. 
{\bf 181}, L1-L4 and H.~Suzuki, M.~Ohishi, N.~Kaifu, S.~Ishikawa, T.~Kasuga,
S.~Saito, and K.~Kawaguchi, 1986, Publ. Astron. Soc. Japan {\bf 38}, 911-917.
The spectra were fit using a Hunds case (b) Hamiltonian, but the quantum
numbers were converted to case (a) quanta.

The dipole moment is from a quantum calculation of F.~Pauzat and Y.~Ellinger,
1989, Astron. Astrophys. {\bf 216}, 305-309.