The ATCA Forum

Thanks Mark,

Good to know that, I will also try PMOSMEM + CCLEAN as suggested.

Cheers,
Stephen

I am planning a polarization observation of an extended source. I prefer the Maximum Entropy Method (MEM) since it usually gives me better results for extended source. Is there anything similar to cclean, but with MEM? As an alternative, can I use pmosmem on single pointing observation? Or I should ...

Using a small cellsize as suggested works perfectly! Thanks Mark. The observation was a snapshot with very short integration time of a few min only.

Hi Jamie, I've attached a few plots, made with the following commands respectively uvplt vis=test.uv stokes=i select="ant(6)" nxy=3,2 device=plt1.png/png uvplt vis=test.uv stokes=i select="ant(6)" nxy=3,2 axis=freq,amp options=nofqav device=plt2.png/png uvplt vis=test.uv stokes=i...

I saw the data points when plotting out with uvplt

uvplt vis=test.uv device=/xs select="ant(6)" stokes=i options=nobase

so those are not flagged, but for some reason just rejected by invert. I can send around the data for a closer look if needed.

sure. invert vis=test.uv map=test.imap cell=10 imsize=1025 stokes=i robust=2 select="ant(6)" options=mfs invert: Revision 1.22, 2016/01/20 03:03:49 UTC Reading the visibility data ... Making MFS images Visibilities accepted: 0 ### Warning: Visibilities rejected: 922050 ### Fatal Error: No ...

Hi, I have a snapshot observation made with H214 array configuration at cm wavelengths. After usual flagging and calibration, I tried form an mfs continuum image with only ant 6, all visibilities were rejected by invert. uvfstats indicates that only ~20% of data were flagged and uvplt also looks fin...