The ATCA Forum

Hi Mark, Just going back to my fainter sources (~2 sigma detection), when I set the cutoff to 5*rms in clean no iterations are completed because the cutoff is already reached. Is this an issue at all? I've tried adding the second clean i.e. cutoff=5*rms,rms but this seems to not iterate at all. Chee...

Thanks heaps!

Thanks mark, this has significantly help in my imaging process.

Here's my image now, looking much better.

Hi Mark,

Thanks again,

From my understanding the beam size changes in relation to the weighting, is there a way to determine its size previous to invert for its input into the invert task?

Cheers,

Brodie

Hi Mark, Thanks for the reply, I thought the best way to measure a flux was to use natural weighting? If I use the robust parameter any where between -2 and 2 miriad prints I'm using a uniform weighting, and I either get an image with stripe bands for closer to negative robust values or a lower sign...

Hi Mark, I'm a little more confused now. So on the principle that it's appropriate to clean a source until the min,max,rms values start to rise I re-cleaned some of my brighter targets. Attached are two images (natural weighting), the first is for niters=1000 (what I use to always use as a default) ...

Hi Mark,

Thanks for the reply, I've attached said image.

In regards to making a lower resolution image, what does that mean exactly?

Cheers,
Brodie

Thanks for the reply!

Apologies I somehow had incorrectly inputted the levs1 desired contours, this issue is now solved

Hi again, I'm trying to determine the integrated flux of my source. Using: imfit in=imagefile region=arcsec,box(-8,-8,8,8) object=gaussian Produces an integrated flux: 3.5969E-05 +/- 1.8854E-05 Where, using: uvfit vis=visfile object=gaussian Produces an integrated flux: 6.0837E-05 +/- 3.23E-05 Now I...