\\ Species Tag:        &   40007 & Name:&  MgO, v = 0, 1
\\ Version:            &       1 & & Magnesium oxide,
\\ Date:       & Sep. 1997       & & X $^1 \Sigma ^+$
\\ Contributor:& H. S. P. M\"uller & &
\\             &                 & &
\\ Lines Listed:       &      44 & Q(300.0)=&      374.621
\\ Freq. (GHz) $<$     &    1500 & Q(225.0)=&      276.000
\\ Max. J:             &      44 & Q(150.0)=&      182.838
\\ LOGSTR0=            &    -6.0 & Q(75.00)=&       91.495
\\ LOGSTR1=            &    -3.5 & Q(37.50)=&       45.906
\\ Isotope Corr.:      & -0.1051 & Q(18.75)=&       23.120
\\ Egy. (cm$^{-1}$) $>$& 0.0, 774.74 & Q(9.375)=&   11.731
\\ $\mu_a$ = & 6.88              & A=&
\\ $\mu_b$ = &                   & B=& 17149.38, 16989.58
\\ $\mu_c$ = &                   & C=&
\headend

The lines of the $v$ = 0, 1, 2 were taken from (1) T. T\"orring and J. Hoeft,
1986, Chem. Phys. Lett. {\bf 126}, 477.
Infrared transitions reported by (2) S. Civi\v{s}, H. G. Hedderich, and
C. G. Blom, 1991, Chem. Phys. Lett. {\bf 176}, 489,
were also used in the fit.
The dipole moment is taken from an {\it ab initio} calculation by
(3) P. W. Fowler and A. J. Sedlej, 1991, Mol. Phys. {\bf 73}, 43.