Table 1: Observational parameters for the ATCA NH₃ and cm observations.
Parameter NH₃ (1, 1) 1.3 cm continuum

Rest frequency (MHz) 23 695 23 569

Total bandwidth (MHz) 8 128

Primary beam (arcmin) 2.5 2.5

Number of channels 512 32

Channel resolution (kHz) 15.6 -

Velocity resolution (km s^-1) 0.2 -

Date of observations 29 April 2004

Total integration time (h) 12

Phase centre RA(J2000) Dec(J2000)

15 $\rm ^h55^m49^s$ -54 $^\circ$ 39 $^\prime$ 13 $^{\prime\prime}$

Array configurations EW357

Flux density calibrator Mars

Bandpass calibrator 1253-055

Phase calibrator 1613-586

**Table 1:** Observational parameters for the ATCA NH₃ and cm observations.
Parameter	NH₃ (1, 1)	1.3 cm continuum
Rest frequency (MHz)	23 695	23 569
Total bandwidth (MHz)	8	128
Primary beam (arcmin)	2.5	2.5
Number of channels	512	32
Channel resolution (kHz)	15.6	-
Velocity resolution (km s^-1)	0.2	-
Date of observations	29 April 2004
Total integration time (h)	12
Phase centre	RA(J2000)	Dec(J2000)
	15 $\rm ^h55^m49^s$	-54 $^\circ$ 39 $^\prime$ 13 $^{\prime\prime}$
Array configurations	EW357
Flux density calibrator	Mars
Bandpass calibrator	1253-055
Phase calibrator	1613-586

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