\\ Species Tag:        &   49003 & Name:&  C4H          
\\ Version:            &       1 & & Butadiynyl radical,
\\ Date:       &  Apr. 1995      & & X $^2\Sigma^+$ 
\\ Contributor:&  M. L. Delitsky & & 
\\             &  H. M. Pickett  & & 
\\ Lines Listed:       &     742 & Q(300.0)=&     5255.5819
\\ Freq. (GHz) $<$     &    920. & Q(225.0)=&     3943.3827
\\ Max. J:             &      98 & Q(150.0)=&     2629.1571
\\ LOGSTR0=            &    -8.0 & Q(75.00)=&     1315.0879
\\ LOGSTR1=            &    -100 & Q(37.50)=&      658.1711
\\ Isotope Corr.:      &     0.0 & Q(18.75)=&      329.7433
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&      165.5392
\\ $\mu_a$ = & 0.900             & A=& 
\\ $\mu_b$ = &                   & B=& 4758.6    
\\ $\mu_c$ = &                   & C=& 
\headend 
 
The observed lines are from: M. Guelin {\it et al.}, 1982, Astron.
Astrophys. {\bf 109}, 23. C.A. Gottlieb {\it et al.}, 1983, Astrophys.
J. {\bf 275}, 916. The dipole moment is from C.A. Olano {\it et al.},
1988, Astron. Astrophys. {\bf 196}, 194.