Results with the ATCA 3mm Prototype System (July 2001)

HCO⁺ emission in the Circinus galaxy

The HCO⁺ (1-0) spectra displayed below have been obtained on July 10, 2001, with the one baseline (CA03-CA04: 30m) 3mm prototype system of the Australia Telescope Compact Array. Weather conditions were good with system temperatures around 330-420 K for CA03 and 300-350 K for CA04.
The HCO⁺ (1-0) rest frequency is 89.188518 GHz.

• Calibrated HCO⁺ emission spectra of the Circinus galaxy. The centre frequencies of the two IFs are 89.110 GHz and 89.020 GHz, each with a bandwidth of 128 MHz, divided into 64 channels (config ant234ac_128_64_2p-2f). The displayed spectra are Hanning smoothed (hann=3). Please note the overlap region in the velocity range 250-300 km/s. The systemic velocity of Circinus is 440 km/s. Bandpass and flux calibration was obtained by observing Mars (NOTE: the flux scale is wrong by a factor of about 10).
• Full HCO⁺ emission spectrum of the Circinus galaxy, obtained with the miriad program "uvglue". The integration time on-source is 40 minutes.

See also