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Re: Scale the psf on images. [message #89981 is a reply to message #89968]

Tue, 13 January 2015 00:59

bstecklu
Messages: 14
Registered: February 2012

Junior Member

On 2015-01-12 09:15, anes.tziamtzis@gmail.com wrote:
> Hi
>
> I would like to perform a live test during an upcoming observing run. I want to take a series of frames on various sources and check for variability on them. I would like to make the image subtraction as accurate as possible, thus I think that image subtraction should take place after the psf of the frames is matched.
>
> Which technique you think is the best? I tried with the convolve script but the result is not good.
>
> imconv = convolve( image1, image2, FT_PSF = psf)
>
> image 1 the science frame and image is the psf frame that I created through iraf.
>
> Any suggestions are appreciated
>
> Thanks a lot.
>
There are a couple of packages around for difference imaging or difference image
analysis (DIA), e.g. ISIS http://www2.iap.fr/users/alard/package.html. When it
comes to IDL you might want to have a look at Dan Bramich's page
http://www.danidl.co.uk/danidl.features.shtml which provides both papers and
code (DanIDL v1.1) for this purpose.

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[Message index]

		Scale the psf on images. By: anes.tziamtzis on Mon, 12 January 2015 00:15
		Re: Scale the psf on images. By: rryan%stsci.edu on Mon, 12 January 2015 01:17
		Re: Scale the psf on images. By: anes.tziamtzis on Mon, 12 January 2015 04:38
		Re: Scale the psf on images. By: anes.tziamtzis on Tue, 13 January 2015 22:50
		Re: Scale the psf on images. By: Mats Löfdahl on Wed, 14 January 2015 00:43
		Re: Scale the psf on images. By: Mats Löfdahl on Mon, 12 January 2015 02:42
		Re: Scale the psf on images. By: rryan%stsci.edu on Mon, 12 January 2015 04:57
		Re: Scale the psf on images. By: bstecklu on Tue, 13 January 2015 00:59
		Re: Scale the psf on images. By: anes.tziamtzis on Wed, 14 January 2015 23:13
		Re: Scale the psf on images. By: Mats Löfdahl on Wed, 14 January 2015 23:58
		Re: Scale the psf on images. By: anes.tziamtzis on Thu, 15 January 2015 00:04
		Re: Scale the psf on images. By: Mats Löfdahl on Thu, 15 January 2015 02:19
		Re: Scale the psf on images. By: anes.tziamtzis on Thu, 15 January 2015 05:33
		Re: Scale the psf on images. By: Mats Löfdahl on Thu, 15 January 2015 07:08
		Re: Scale the psf on images. By: Mats Löfdahl on Thu, 15 January 2015 07:12

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