\\ Species Tag:        &   34001 & Name:&  O-18-O
\\ Version:            &       5 & & Molecular oxygen,
\\ Date:       &   Mar. 2014     & & single substituted
\\ Contributor:&   Shanshan Yu   & & $^{18}$O isotope
\\             &   Brian Drouin  & & X $^3 \Sigma^-_g$, v = 0
\\ Lines Listed:       &     672 & Q(300.0)=&      461.4189
\\ Freq. (GHz) $<$     &    9999 & Q(225.0)=&      345.7514
\\ Max. J:             &      62 & Q(150.0)=&      230.4320
\\ LOGSTR0=            &   -20.0 & Q(75.00)=&      115.2150
\\ LOGSTR1=            &   -20.0 & Q(37.50)=&       57.6805
\\ Isotope Corr.:      &  -2.691 & Q(18.75)=&       29.0178
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&       14.8627
\\ $\mu_a$ = &  magnetic         & A=&
\\ $\mu_b$ = &                   & B=& 40707.4
\\ $\mu_c$ = &                   & C=&
\headend

The measurements are from
\\ 1. B.J Drouin et al., 2009, J. Quant. Spectrosc. Radiat. Transf. (in press).
\\ 2. M. Mizushima and S. Yamamoto, 1991, J. Mol. Spect. {\bf 148}, 447;
\\ 3. R. L. Crownover, F. C. De Lucia and E. Herbst, 1990, Astrophys. J. {\bf 349,} L29;
\\ 4. W. Steinbach and W. Gordy, 1975, Phys. Rev. {\bf A11}, 729;
\\ 5. T. Amano and E.  Hirota, 1974, J. Mol. Spect. {\bf 53}, 346;

When the same transition was measured by different groups, all measurements
were included in the fit with their respective experimental accuracies as weights. 
Predictions above 3.3 THz should be viewed with caution. Intensities of magnetic dipole
transitions have been calculated using the $^{16}$O$_2$ $g$ values obtained
from magnetic resonance by K. D. Bowers, R. A. Kamper, and C. D. Lustig, 1959,
Proc. Roy. Soc. London {\bf A251}, 565. The zero-frequency absorption
is included but the frequency is set to a synthetic frequency of $|$g$|$ J for
the given level.

The Hamiltonian is given in:
S. Yu, C.E. Miller, B.J. Drouin, H.S.P. Mueller, J. Chem. Phys. 136, 2012. 
The perpendicular g-factor has been removed from the intensity file in order to eliminate its excessive contribution to intensities at higher $J$ values, catalog version 4 differed significantly from prior catalog versions due to a change in how this parameter is treated in the intensity calculation.  The zero-frequency absorption is included but the frequency is set to a synthetic frequency of |g| J for the given level.