\\ Species Tag:        &   37002 & Name:&  C3H          
\\ Version:            &       1 & & 2-Propynylidyne
\\ Date:       &  Apr. 1995      & & ground $^2\Pi$ state
\\ Contributor:&  H. M. Pickett  & & and $\nu_4=1$ $^2\Sigma^{\mu}$ state
\\             &  M. L. Delitsky & & 
\\ Lines Listed:       &    4990 & Q(300.0)=&     6283.6523
\\ Freq. (GHz) $<$     &  3438.1 & Q(225.0)=&     4622.2113
\\ Max. J:             &      60 & Q(150.0)=&     2960.9861
\\ LOGSTR0=            &    -10. & Q(75.00)=&     1323.4710
\\ LOGSTR1=            &    -100 & Q(37.50)=&      546.9895
\\ Isotope Corr.:      &         & Q(18.75)=&      210.2441
\\ Egy. (cm$^{-1}$) $>$& 0.0,20.3& Q(9.375)=&       84.0073
\\ $\mu_a$ = & 3.10              & A=& 
\\ $\mu_b$ = &                   & B=& 11189.059 
\\ $\mu_c$ = &                   & C=& 
\headend 
 
The observed lines and dipole moment are from: S. Yamamoto, S. Saito and
M. Ohishi, 1990, Astrophys. J. {\bf 348},363. C. A. Gottlieb, E. W.
Gottlieb, P. Thaddeus and J. M. Vrtilek, 1986, Astrophys. J. {\bf
303}, 446.
	
The $\nu_4=1$ state is only 610 GHz above the ground state and is
strongly coupled with the ground state.  The form of the interaction is
given in J. T. Hougen, 1962, J. Chem. Phys. {\bf 36}, 519. The dipole
moment for the $\nu_4=1$ state is assumed to be the same as the ground
state. There is a 0.5 Debye b symmetry moment between the ground state
and $\nu_4=1$.