\newcommand{\nodata}{...}
%\newcommand{\arcmin}{'}
\renewcommand{\deg}{\ensuremath{^\circ}}
\newcommand{\pdeg}{\ensuremath{.\kern-.25em ^{^\circ}}}
\newcommand{\units}[2][]{\ensuremath{\,{\mathrm{#2}}^{#1}}}
%\newcommand{\kms}{\units[-1]{km\, s}}
\newcommand{\cm}[1][-3]{\units[#1]{cm}}
\newcommand{\pc}{\units{pc}}
\newcommand{\kpc}{\units{kpc}}
\newcommand{\mhz}{\units{MHz}}
\newcommand{\ghz}{\units{GHz}}
\newcommand{\microns}{\units{\mu m}}

\newcommand{\vlsr}{\ensuremath{v_{\mathrm{LSR}}}}

\newcommand{\expo}[2][o]{\ensuremath{\ifnum `o=`#1 \else #1 \times \fi{10^{#2}}}}

\newcounter{cotransition}
\newcommand{\co}[2][l]{\setcounter{cotransition}{#2}CO%
  \ifnum`s=`#1\else ~\fi{%
    \ifnum`s=`#1(\else$J =\fi%
    \thecotransition%
    \ifnum`s=`#1--\nolinebreak[3]\else\rightarrow\fi%
    \addtocounter{cotransition}{-1}\thecotransition%
    \ifnum`s=`#1)\else$\fi}}

\newcommand{\thirtco}[2][l]{\setcounter{cotransition}{#2}$^{13}$CO%
  \ifnum`s=`#1\else ~\fi{%
    \ifnum`s=`#1(\else$J =\fi%
    \thecotransition%
    \ifnum`s=`#1--\nolinebreak[3]\else\rightarrow\fi%
    \addtocounter{cotransition}{-1}\thecotransition%
    \ifnum`s=`#1)\else$\fi}}

\newcommand{\cs}[2][l]{\setcounter{cotransition}{#2}CS%
  \ifnum`s=`#1\else ~\fi{%
    \ifnum`s=`#1(\else$J =\fi%
    \thecotransition%
    \ifnum`s=`#1--\nolinebreak[3]\else\rightarrow\fi%
    \addtocounter{cotransition}{-1}\thecotransition%
    \ifnum`s=`#1)\else$\fi}}

\newcommand{\cibracket}{[$\mathrm{C}\,\scriptstyle \mathrm{I}$]}
\newcommand{\ci}{\ensuremath{\mathrm{C}\,\scriptstyle \mathrm{I}}}
\newcommand{\cii}{\ensuremath{\mathrm{C}\,\scriptstyle \mathrm{II}}}
\newcommand{\ciibracket}{[\ensuremath{\mathrm{C}\,\scriptstyle \mathrm{II}}]}
\newcommand{\niibracket}{[\ensuremath{\mathrm{N}\,\scriptstyle \mathrm{II}}]}
\newcommand{\oibracket}{[\ensuremath{\mathrm{O}\,\scriptstyle \mathrm{I}}]}
\newcommand{\oiiibracket}{[\ensuremath{\mathrm{O}\,\scriptstyle \mathrm{III}}]}
\newcommand{\cit}[2][l]{\setcounter{cotransition}{#2}\cibracket%
  \ifnum`s=`#1\else ~\fi{%
    \ifnum`s=`#1($^3$P$_\thecotransition$--\nolinebreak[3]\else${^3{\mathrm P}_\thecotransition} \rightarrow\fi%
    \addtocounter{cotransition}{-1}%
    \ifnum`s=`#1$^3$P$_\thecotransition$)\else{^3{\mathrm P}_\thecotransition}$\fi}}%

\newcommand{\hi}{H~{$\scriptstyle {\rm I}$}}
\newcommand{\hii}{H~{$\scriptstyle {\rm II}$}}
\newcommand{\nii}{N~{$\scriptstyle {\rm II}$}}
\newcommand{\tsub}[1][]{\ensuremath{T_{\mathrm{#1}}}}
\newcommand{\trms}{\tsub[rms]}
\newcommand{\tsys}{\tsub[sys]}
\newcommand{\tkin}{\tsub[kin]}
\newcommand{\hden}{\ensuremath{n({\mathrm H}_2)}}

\newcommand{\K}{\rm Kelvin}

\newcommand{\sgr}[1]{Sgr\thinspace #1}
\newcommand{\sgrb}{\sgr{B}}

\newcommand{\gb}{\ensuremath{\mathit{b}}}
\newcommand{\gl}{\ensuremath{\ell}}
\newcommand{\glb}{\ensuremath{(\gl , \gb)}}
\newcommand{\glbv}{\ensuremath{(\gl , \gb, v)}}

\newcommand{\gsim}{\ga}
\newcommand{\lsim}{\la}

\newcommand{\tco}{$^{13}$CO}
\newcommand{\comol}{$^{12}$CO}

\newcommand{\scone}{\texttt{SuperCam-1}}
\newcommand{\sctwo}{\texttt{SuperCam-2}}
\newcommand{\dstar}{\texttt{DesertSTAR}}
\newcommand{\pstar}{\texttt{PoleSTAR}}

