Demix of Virgo

Hi,

I've been rerunning fields that were previously processed with PreFactor3 without demix but just using ateam-clipping. For the reprocessing im using LINC and the standard demix settings.

Unfortunately for all fields that ive reprocessed around Virgo the data have got a fair bit worse. Its only 3 fields but thought to raise an issue as perhaps the default behaviour around this source could change. The fields I demixed were separated by 17.5, 10.5 and 12.3 deg away from Virgo.

Anyway, I wonder if its the sky model for Virgo not being much good or something else. Its 1250Jy at 144MHz so id have thought that demix should be working well.

Attached is an example of what i mean by "worse". Here the colour scale is the same on the two panels. The panel on the left is prefactor3 with ateam clipping and the panel on the right is default LINC (so demixing).

Thanks,

Tim