\\ Species Tag:        &   45013 & Name:&  PN        
\\ Version:            &       1 & & $nu$=0,1,2,3,4 
\\ Date:       & Dec. 1996       & & $^1 \Sigma ^+$
\\ Contributor:& J. C. Pearson   & & 
\\             &                 & & 
\\ Lines Listed:       &    1637 & Q(300.0)=&      801.1685
\\ Freq. (GHz) $<$     &    3290 & Q(225.0)=&      600.0817
\\ Max. J:             &      70 & Q(150.0)=&      400.2305
\\ LOGSTR0=            &   -14.0 & Q(75.00)=&      200.5798
\\ LOGSTR1=            &   -14.0 & Q(37.50)=&      100.7852
\\ Isotope Corr.:      &     0.0 & Q(18.75)=&       50.8994
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&       25.9677
\\ $\mu_a$ = & 2.7471            & A=& 
\\ $\mu_b$ = &                   & B=& 23578.2
\\ $\mu_c$ = &                   & C=& 
\headend 
 
The data were taken from: J. Hoeft, E. Tiemann and T\"orring, 1972, Z.
Naturforsch. {\bf 27a}, 703. F. C. Wyse, E. L. Manson and W. Gordy,
1972, J. Chem. Phys. {\bf 57}, 1106. I. K. Ahmad and P. A. Hamilton,
1995, J. Mol. Spectrosc. {\bf 169}, 286.

The value of the nitrogen nuclear quadrupole (eqQ$_N$) and the nirtogen
magnetic interaction (C$_N$) were fixed to the molecular beam electric
resonance value of J. Raymonda and W. Klemperer, 1971, J. Chem. Phys.
{\bf 55}, 232. The phosphorus magnetic interaction (C$_P$) of -78.2 kHz
was not included in the analysis. The vibrational energies for $nu$>1
were fixed to the values given by Ahmad and Hamilton.

A dipole moment of 2.7514-0.0086($nu$+1/2) Debye was determined by
Raymonda and Klemperer and corrected by Wyse, Manson and Gordy.

PN was first observed in the interstellar medium by L. M. Ziurys, 1987,
Astrophys. J. {\bf 321}, L81.