Table 5: Continuum and emission line strengths as well as linewidths and equivalent widths of the Pf$\gamma $ line towards the observed sources.
Object Line-continuum of HI (3.739$~\mu$m) Integral of HI (3.739$~\mu$m) EW of HI (3.739$~\mu$m) Line width
    $ 10^{-18}~\rm W~cm^{-2}~\mu m^{-1}$   $10^{-18}~\rm W~cm^{-2}$ Å Å
IRS 1 W $13.50\pm0.60$ $ 0.1276\pm0.0198$ $ -12.86\pm1.36~$  $189\pm21$
IRS 3 $3.30\pm0.40$ $ 0.0346\pm 0.0077$ $ -4.79\pm1.06$  $210\pm21$
IRS 7 $18.00\pm1.00$ $ 0.1224\pm 0.0158$ $ -4.41\pm0.52~$  $136\pm10$
IRS 9 $3.80\pm0.70$ $ 0.0380\pm0.0091$ $ -12.63\pm1.67~$  $200\pm11$
IRS 21 $2.10\pm0.10$ $ 0.0166\pm0.0041$ $ -9.29\pm0.69~$  $158\pm32$
IRS 29 $1.10\pm0.10$ $ 0.0072\pm0.0009$ $ -3.73\pm0.31~$  $131\pm5$
IRS 13 $8.90\pm0.25$ $ 0.0703\pm0.0064$ $ -15.29\pm0.86$  $158\pm10$
IRS 13 N $6.30\pm0.30$ $ 0.0627\pm0.0127$ $ -15.38\pm1.64~$  $199\pm31$
IRS 16 CC $0.37\pm0.03$ $ 0.0039\pm0.0007$ $ -9.96\pm1.14~$  $210\pm21$
IRS 16 C $0.86\pm0.05$ $ 0.0086\pm0.0009$ $ -20.03\pm1.84~$  $200\pm10$
IRS 16 NE $2.16\pm0.08$ $0.0239\pm0.0042$ $ -21.74\pm2.50~$  $221\pm31$
IRS 16 SW $1.07\pm0.05$ $ 0.0096\pm0.0010$ $ -19.72\pm1.53~$  $179\pm10$


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