The ATCA Forum

Hi,

I'm getting a weirdly elongated beam from my reduction, and a corresponding non detection.

The ra and dec for my source is: 05 16 00.4764811920 -09 48 35.394685295

I'm finding this very strange because:
(1) The weather was great (image attached)
(2) The elevation for the majority of the observation was great (image attached)
(3) There wasn't any significant outliers in the amp/phase vs time plots, or the channel vs amp plots

My reduction steps are as follows:
(1) mfcal on the bpcal with int=0.1
(2) gpcopy (1)'s sol onto the phase cal and flux cal
(3) mfcal on the flux cal with int=0.1 and options=nopassol
(4) mfcal on the phase cal with int=0.1 and options=nopassol
(5) gpboot phasecal with flux cal
(6) gpcopy (5)'s sol onto the targets

My images steps are as follows:
(1) invert with imsize=3,3,beam cell=5,5,res sup=$sup options=mfs,double
(2) clean with cutoff=5*rms
(3) restor
and cgdisp to view

Not sure what to look at from here, any suggestions would be greatly appreciated.

Cheers,
Brodie

Hi Brodie,

what is the array configuration?

For East-West arrays, you would expect an elongated beam, 1/sin(dec)~6, so 6 to 1 beam axis ratio.
For Hybrid arrays it should be better.

Cheers,

Mark

Hi Mark,

Thanks for the reply, it was the 6A configuration.

Cheers,