<p>What instrument was used to take the data?  <a href="https://www.stsci.edu/hst/instrumentation/wfc3/data-analysis/psf" rel="nofollow noreferrer">This page</a> has PSFs for WFC3.</p>

CC BY-SA 4.0
2020-07-31T23:56:16.970Z
It was WFPC2. Yeah, I saw this page. Tried to find something in WFPC2 PSF Library (https://www.stsci.edu/ftp/instrument_news/WFPC2/Wfpc2_psf/wfpc2-psf-form.html), but without success.
Igor Kolesnikov
CC BY-SA 4.0
2020-07-31T23:06:16.300Z
2020-07-31T23:06:16.300Z
Eric Jensen
<p>I want to model an image of a galaxy from Hubble.
For this, I need the PSF image as well.</p>
<p>I already tried to use TinyTim, but I don't have half of the parameters and cant be sure about the quality of output.</p>
<p>Is there any way for me to get it from the .fits image of a galaxy?</p>

CC BY-SA 4.0
2020-08-01T11:28:11.507Z
I am not sure about chip but suppose its 2; also not sure about the position on detector, but think it could be 400 400 (https://www.stsci.edu/ftp/instrument_news/WFPC2/Wfpc2_psf/PLOTS/555w2.html); passband is fine, f555w; absolutely have no idea about the spectrum, and don't know what to put in focus, but I think its 0.
Igor Kolesnikov
CC BY-SA 4.0
2020-08-01T18:44:09.803Z
How can I get the color of my object? Can't find it in the header or on the library..
Igor Kolesnikov
<hubble-telescope><modeling>
How can I get/generate/extract PSF image from galaxy .fits image?
Igor Kolesnikov
# How can I get/generate/extract PSF image from galaxy .fits image?

(Asked by: username_0 on 2020-07-31)

I want to model an image of a galaxy from Hubble.
For this, I need the PSF image as well.

I already tried to use TinyTim, but I don't have half of the parameters and cant be sure about the quality of output.

Is there any way for me to get it from the .fits image of a galaxy?

**Tags:** hubble-telescope, modeling
> **Comments:**
> **username_0**: I am not sure about chip but suppose its 2; also not sure about the position on detector, but think it could be 400 400 (https://www.stsci.edu/ftp/instrument_news/WFPC2/Wfpc2_psf/PLOTS/555w2.html); passband is fine, f555w; absolutely have no idea about the spectrum, and don't know what to put in focus, but I think its 0.  
> **username_0**: How can I get the color of my object? Can't find it in the header or on the library..  

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## 1 answers

### Answer by username_1 on 2020-07-31. Score: 0

What instrument was used to take the data? [This page](https://www.stsci.edu/hst/instrumentation/wfc3/data-analysis/psf) has PSFs for WFC3.

> **Comments:**
> **username_0**: It was WFPC2. Yeah, I saw this page. Tried to find something in WFPC2 PSF Library (https://www.stsci.edu/ftp/instrument_news/WFPC2/Wfpc2_psf/wfpc2-psf-form.html), but without success.  

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