source plane image to image plane image

[Chian-Chou Chen (TC)]

Hi, 

I’ve been trying to figure out how to quickly make an image plane fits image from an input source plane fits image.

From the manual https://projets.lam.fr/projects/lenstool/wiki/RunMode#source

it seem “pixel” in the runmode section is the parameter I need to use, in particular using int1 = 2.

However I got stuck at trying to feed the source plane fits image using the sframe and cleanset parameters of the cleanlens section. 

I’m wondering if there’s any more straightforward way to feed the source image? or any other methods that can do the job?

Thanks

TC

[Johan Richard]

Dear Chian-Chou Chen

"pixel 2" in runmode with the sframe parameter in cleanset is the only way to do it in Lenstool but should be straightforward, as long as your source plane image:

- has WCS information matching the lens model

- is a single extension FITS file (no primary header)

For example a source plane FITS file produced by Lenstool as output from "source 1" and "pixel 1" in runmode would work.

You need to specify in cleanset 1 xx the redshift of the source plane as xx.

I copy an example below taken from a recent Lenstool presentation.

Best,

Johan

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[Chian-Chou Chen (TC)]

Hi Johan, 

Thanks. I did exactly that (first screenshot) but got a complaint about not finding the image (second screenshot). 

I think the problem, at least from the manual, appears to be that "cleanest 1” needs an input from imframe as well as an input for c_image because it’s to “compute from the image pixel-frame imframe the corresponding source frame sframe at redshift float” so I need to provide an input fits in the image plane.

The confusing part is it’s the image plane fits image that I need as an output with an input of a source plane fits image so things seem to go in loops… 

Cheers,

TC

On 13 Aug 2019, at 05:37, Johan Richard <nova...@gmail.com> wrote:

Dear Chian-Chou Chen

"pixel 2" in runmode with the sframe parameter in cleanset is the only way to do it in Lenstool but should be straightforward, as long as your source plane image:

- has WCS information matching the lens model

- is a single extension FITS file (no primary header)

For example a source plane FITS file produced by Lenstool as output from "source 1" and "pixel 1" in runmode would work.

You need to specify in cleanset 1 xx the redshift of the source plane as xx.

I copy an example below taken from a recent Lenstool presentation.

Best,

Johan

<image.png>

To view this discussion on the web visit https://groups.google.com/d/msgid/lenstool/CAMwZtFKeCyJfi6DVQnCSzO6wmJjdE9o14sz_3R86G_29dCH2OA%40mail.gmail.com.

[Johan Richard]

Hi

Pixel 2 is a relatively recent feature, are you using a recent installation (latest svn, v>7.1 or macports?

Your file looks fine you would not need any imframe etc just sframe.

If you have doubts please send me an example file(just change the pixel values if there is any sensitive info) and I could test it.

Best,

Johan

To view this discussion on the web visit https://groups.google.com/d/msgid/lenstool/50A4AFC2-6090-4F38-AEC7-7121A9FA5758%40gmail.com.

[Chian-Chou Chen (TC)]

Thanks Johan, 

  Indeed it was the version issue - I was using 6.7.1 since I’ve been using it which has been working fine. 

But now after the update all seem to work.

Cheers,

TC

On 13 Aug 2019, at 13:54, Johan Richard <nova...@gmail.com> wrote:

Hi

Pixel 2 is a relatively recent feature, are you using a recent installation (latest svn, v>7.1 or macports?

Your file looks fine you would not need any imframe etc just sframe.

If you have doubts please send me an example file(just change the pixel values if there is any sensitive info) and I could test it.

Best,

Johan

Le mar. 13 août 2019 10:57, Chian-Chou Chen (TC) <ccch...@gmail.com> a écrit :

Hi Johan, 

Thanks. I did exactly that (first screenshot) but got a complaint about not finding the image (second screenshot). 

I think the problem, at least from the manual, appears to be that "cleanest 1” needs an input from imframe as well as an input for c_image because it’s to “compute from the image pixel-frame imframe the corresponding source frame sframe at redshift float” so I need to provide an input fits in the image plane.

The confusing part is it’s the image plane fits image that I need as an output with an input of a source plane fits image so things seem to go in loops… 

Cheers,

TC

To view this discussion on the web visit https://groups.google.com/d/msgid/lenstool/CAMwZtFJLJ0WMNu3xhuJNFxbmhcwhr_-vKGPv-m1015pgtXjxhg%40mail.gmail.com.
<Screen Shot 2019-08-13 at 10.50.09.png><Screen Shot 2019-08-13 at 10.50.09.png>