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Step functions in source light profile - Printable Version

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Step functions in source light profile - Jragonfly - 12-15-2015 23:30

Hi,

I am using Skymaker to generate an image with extended aureole, at a resolution lower than the default 0.2"/ FWHM of 0.7". However, when I try to generate an image at a lower resolution, the light profiles of the sources in the output images have step functions in them.

I attach an example fits file, the input catalog file and the configuration file used.

Does anyone have ideas on how I can get rid of the step functions, and instead get a smooth extended psf/ light profile around each source?

Many thanks,
Jielai

catalog: https://www.dropbox.com/s/mnjha0hzrxgvuxj/dragonfly.list?dl=0
config: https://www.dropbox.com/s/37ch5j6opotj08t/config6_5.txt?dl=0
fits file: https://www.dropbox.com/s/jk1onvkgwylx57g/sky6_5.fits?dl=0