\\ Species Tag:        &   27003 & Name:&  HCN-v2        
\\ Version:            &       1 & &Hydrogen cyanide,
\\ Date:       &  Aug. 1991      & &$\nu_2=1$  state
\\ Contributor:&  E. A. Cohen    & &
\\             &                 & &
\\ Lines Listed:       &     132 & Q(300.0)=&      141.442
\\ Freq. (GHz) $<$     &    4322 & Q(225.0)=&      106.164
\\ Max. J:             &      49 & Q(150.0)=&       70.873
\\ LOGSTR0=            &    -8.7 & Q(75.00)=&       35.602
\\ LOGSTR1=            &    -8.7 & Q(37.50)=&       17.971
\\ Isotope Corr.:      &     0.0 & Q(18.75)=&        9.158
\\ Egy. (cm$^{-1}$) $>$&   716.5 & Q(9.375)=&        4.757
\\ $\mu_a$ = &  2.942            & A=&
\\ $\mu_b$ = &                   & B=&44422.616
\\ $\mu_c$ = &                   & C=&
\headend
The microwave data have been taken from a compilation by A. G. Maki, 1974, 
J. Phys.~Chem.~Ref.~Data {\bf 3,} 221.  Combination differences up to 
$J^{'}=22$ are included in the fit.  These have been derived from the 
high-resolution FTIR spectrum of the $\nu_2$ band reported by J. Hietanen 
{\it et al.}, 1988, J.~Mol.~Spect.~{\bf 127}, 272.  Hyperfine structure 
is not given for this state in the catalog.  The partition function used 
in the calculation reflects this.