\\ Species Tag:        &   54005 & Name:&  HO$^{37}$Cl           
\\ Version:            &       4 & & Hypochlorous acid
\\ Date:       &  July 2006      & & 
\\ Contributor:&  B. J. Drouin   & & 
\\             &                 & & 
\\ Lines Listed:       &   40627 & Q(300.0)=&   9691.7046
\\ Freq. (GHz) $<$     &   15000 & Q(225.0)=&   6290.9707
\\ Max. J:             &      99 & Q(150.0)=&   3423.0827
\\ LOGSTR0=            &    -9.9 & Q(75.00)=&   1211.0331
\\ LOGSTR1=            &    -9.9 & Q(37.50)=&    429.3041
\\ Isotope Corr.:      &  -0.611 & Q(18.75)=&    153.2631
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&     59.3787
\\ $\mu_a$ = &  0.3627           & A=& 613461.3422
\\ $\mu_b$ = &  1.471            & B=& 14850.43945
\\ $\mu_c$ = &                   & C=& 14472.89756
\headend 

The data and calculational method are given in Drouin \emph{JQSRT} 2006 and references below. 
The chlorine hyperfine structure is included in this version of the catalog for all $J$.  
The maximum value of $K_a$ in the calculation is 20.

The analysis of the line positions given here includes
measurements from the literature:

H. E. Singbeil {\it et al.},1984, J. Mol. Spect. {\bf 103}, 466

Bellini M, De Natale P, Fusina L, Modugno G. The pure rotation spectrum of HOCl in the submillimeter-wave region, J Mol Spec 1995; 172: 559-562.

Wells, JS, Sams RL, Lafferty WJ, J Mol Spec 1979; 77: 349-364.

Flaud J-M, Birk M, Wagner G, Orphal J, Klee S, Lafferty WJ, The far infrared spectrum of HOCl: line positions and intensities, J Mol Spec 1998; 191: 362-367.
                                       

Careful adjustments of the estimated uncertainties of the separate
data sets was done to ensure overall balance in the analysis. The
fit statistics of the Doppler resolved (Bellini,Drouin) and non-Doppler 
instruments (Wells,Flaud) were separated by fitting the Fourier transform
data in wavenumber units. This process does not change the parameter fitting
procedure, it simply splits the residual average and residual
root-mean-square (\emph{rms}) values reported after each
iteration. Previously catalogued data (Singbeil) was used just
as before. The data from Ref (Bellini) was included at twice
the uncertainties given in the publication.  The new measurements
of Drouin were given 100 kHz (for $\nu <$ 1 THz) or 200 kHz
uncertainties. Combination differences (Wells) are all
given uncertainties of 0.0005 cm$^{-1}$. The DLR data from  Flaud
was given five times the uncertainty estimated in the
data file provided by the authors. The Giessen data from Flaud was
assigned the uncertainty 0.00014 cm$^{-1}$. Drouin outlines the fitting
of this data with either symmetric or asymmetric Watsonians, the symmetric
parameterization is utilized for this catalog listing.