\begin{table}%t2
\caption{List of observational parameters for IRAM 30~m and 22~m Mopra telescopes.}           % title of Table
\label{table4}      % is used to refer this table in the text
%\begin{center}
\par
\begin{tabular}{lccccccccc}
\hline
\hline\noalign{\smallskip}
Species 	& Transition	& Frequency	& HPBW	& Instrument$^d$	& $\eta_{\rm mb}$ & Receiver	& $\delta \varv$     & Mode & $T_{\rm sys}$\\ 
		&		 	& [GHz] 		& [\arcsec]		& &		         &                          & [m~s$^{-1}$]  &            &  [K]             \\
\hline\noalign{\smallskip}
CS				& $J=2$--1 & 97.9809 & 25 & 30~m & 0.78 & A100 & 60 & RaM$^a$  & 260 \\
				& $J=2$--1 & 97.9809 & 32 & Mo & 0.49 & 3.5~mm & 191 & OTF$^c$ & 240  \\
				& $J=3$--2 & 146.9690 & 17 & 30~m & 0.69 & D150 & 80 & RaM$^a$  & 420 \\
				& $J=5$--4 & 244.9356 & 10 & 30~m & 0.49 & D270 & 96 & RaM$^a$  & 1150 \\
\hline\noalign{\smallskip}
C$^{34}$S			& $J=2$--1 & 96.4129 & 25 & 30~m & 0.78 & A100 & 61 & RaM$^a$  & 190 \\
				& $J=2$--1 & 96.4129 & 32 & Mo & 0.49 & 3.5~mm & 194 & OTF$^c$ & $\sim$270 \\
				& $J=3$--2 & 144.6171 & 17 & 30~m & 0.69 & D150 & 81 & RaM$^a$  & 390 \\
\hline\noalign{\smallskip}
CO				& $J=2$--1 & 230.5380 & 11 & 30~m & 0.52 & HERA & 406 & RaM2$^b$  &$\sim$600\\
\hline\noalign{\smallskip}
H$_2$CO 			& $J=3_{03}$--2$_{02}$ & 218.2222 & 11 & 30~m & 0.54 & HERA & 107 & RaM2$^b$  & 250 \\
				& $J=3_{22}$--2$_{21}$ & 218.4756 & 11 & 30~m & 0.54 & HERA & 107 & RaM2$^b$  & 250 \\
				& $J=3_{12}$--2$_{11}$ & 225.6978 & 11 & 30~m & 0.53 & A230 & 104 & RaM$^a$  & 870 \\
\hline\noalign{\smallskip}
HCO$^+$ 	& $J=1$--0 & 89.1885 & 36 & Mo & 0.49 & 3.5~mm & 210 & OTF$^c$ &  $\sim$260\\
H$^{13}$CO$^+$ 	& $J=1$--0 & 86.7542 & 36& Mo & 0.49 & 3.5~mm & 216 & OTF$^c$ & $\sim$175\\
\hline\noalign{\smallskip}
N$_2$H$^+$ & $J=1$--0 & 93.1737 & 36 & Mo & 0.49 & 3.5~mm & 201 & OTF$^c$ &  $\sim$180\\
\hline
\end{tabular} 
%\end{center}
\par
Note: Cols. 2--10 indicate energy level transitions, line emission frequencies, half power beam width (HPBW), instrument (30~m for IRAM-30~m and Mo for Mopra telescope), main beam efficiency $\eta_{\rm mb}$, receiver name, velocity resolution $\delta \varv$, observation mode, and system temperature $T_{\rm sys}$.\\
$^a$ RaM -- Raster Map mode set to create a 3~$\times$~3 pixels mini-map with a $\Delta\theta$ step of 10\arcsec\ around source emission peak.\\
$^b$ RaM2 -- Raster Map mode with HERA receiver, set to create a 190\arcsec~$\times$~140\arcsec\ map with a $\Delta\theta$ step of 6\arcsec\ towards MM1, MM2, and MM3.\\
$^c$ OTF -- On-The-Fly observing mode carrying out on a 5\arcmin~$\times$~5\arcmin\ grid with an angle step $\Delta\theta$ of 9\arcsec\ and an OFF position at 30\arcmin\ from the center.\\
$^d$ Conversional factor is $S/T_{\rm mb}=4.95$~Jy/K for IRAM 30~m telescope and $S/T_{\rm mb}=22$~Jy/K for ATNF 22~m telescope.
\end{table}