# \#psf **URL:** https://www.rubin.community/tag/psf/150.md [Latest](https://www.rubin.community/latest.md) · [Categories](https://www.rubin.community/categories.md) · [Tags](https://www.rubin.community/tags.md) --- ## [Source injection with modified PSF](https://www.rubin.community/t/source-injection-with-modified-psf/11181)
**Author:** [@ConnorStone](https://www.rubin.community/u/ConnorStone)\ **Replies:** 7\ **Last updated:** [November 3, 2025, 2:39pm UTC](https://www.rubin.community/t/source-injection-with-modified-psf/11181 "2025-11-03T14:39:17Z")
Hello, I have used the tutorials to try injecting sources into a visit image and that works as expected. However, something I would like to try is injecting a source using a manually modified PSF. Essentially this would… --- ## [Best way to warp a PSF to match a warped image?](https://www.rubin.community/t/best-way-to-warp-a-psf-to-match-a-warped-image/10679)
**Author:** [@charlotteaward](https://www.rubin.community/u/charlotteaward)\ **Replies:** 2\ **Last updated:** [July 31, 2025, 12:39am UTC](https://www.rubin.community/t/best-way-to-warp-a-psf-to-match-a-warped-image/10679 "2025-07-31T00:39:36Z")
Hello! I’ve created warped cutouts following the examples in tutorial-notebooks/DP0.2/13a\_Image\_Cutout\_SciDemo.ipynb at main · lsst/tutorial-notebooks · GitHub and would like to warp their corresponding PSFs so they mat… --- ## [How to compute PSF Image/kernel Image without background noise](https://www.rubin.community/t/how-to-compute-psf-image-kernel-image-without-background-noise/1713)
**Author:** [@Daraexus](https://www.rubin.community/u/Daraexus)\ **Replies:** 2\ **Last updated:** [March 13, 2017, 5:46pm UTC](https://www.rubin.community/t/how-to-compute-psf-image-kernel-image-without-background-noise/1713 "2017-03-13T17:46:38Z")
Hi I’m trying to compute the local PSF of a calexp in order to perform a quick-and-dirty injection of transients. However, whenever I try to use the methods computeKernelImage() and computeImage(), I obtain the shape of… --- ## [Exception AttributeError: 'NoneType' object has no attribute 'getCellList' while debug the PSF](https://www.rubin.community/t/exception-attributeerror-nonetype-object-has-no-attribute-getcelllist-while-debug-the-psf/8452)
**Author:** [@Yuanyu](https://www.rubin.community/u/Yuanyu)\ **Replies:** 3\ **Last updated:** [April 12, 2024, 8:55am UTC](https://www.rubin.community/t/exception-attributeerror-nonetype-object-has-no-attribute-getcelllist-while-debug-the-psf/8452 "2024-04-12T08:55:36Z")
Recently, I am debuging the PSF and below is my debug code: def DebugInfo(name): di = lsstDebug.getInfo(name) # N.b. lsstDebug.Info(name) would # call us recursively … --- ## [How to extract PSFEx PSF from a PVI/calexp outside of Science Pipelines?](https://www.rubin.community/t/how-to-extract-psfex-psf-from-a-pvi-calexp-outside-of-science-pipelines/8057)
**Author:** [@mwv](https://www.rubin.community/u/mwv)\ **Replies:** 8\ **Last updated:** [November 15, 2023, 5:46pm UTC](https://www.rubin.community/t/how-to-extract-psfex-psf-from-a-pvi-calexp-outside-of-science-pipelines/8057 "2023-11-15T17:46:45Z")
How can I most easily extract and use the PSF models from a DP0.2 calexp outside of the Science Pipelines environment? I’m looking for a low-dependency way to get the PSF for use in other astronomical code, without need… --- ## [Recovering the PSF from the CORR images](https://www.rubin.community/t/recovering-the-psf-from-the-corr-images/4181)
**Author:** [@fraserw](https://www.rubin.community/u/fraserw)\ **Replies:** 3\ **Last updated:** [July 10, 2020, 8:02pm UTC](https://www.rubin.community/t/recovering-the-psf-from-the-corr-images/4181 "2020-07-10T20:02:12Z")
Hi Community I am trying to recover the PSFs created by processCcd or singleFrameDriver. I can see the PSFex outputs are stored in extensions 15 and 16 binary tables. Specifically, it seems the basis functions are in ex… --- ## [PSFex fails in singleFrameDriver.py for some CCDs](https://www.rubin.community/t/psfex-fails-in-singleframedriver-py-for-some-ccds/2691)
**Author:** [@mmontes](https://www.rubin.community/u/mmontes)\ **Replies:** 20\ **Last updated:** [March 8, 2018, 9:54pm UTC](https://www.rubin.community/t/psfex-fails-in-singleframedriver-py-for-some-ccds/2691 "2018-03-08T21:54:22Z")
Hi, When I run singleFrameDriver.py there are some of the CCDs that are not processed. This is the error that it gives me: 9583 FATAL 2018-02-19T12:15:37.795+1100 singleFrameDriver: Failed on dataId={'taiObs': '2014-09… --- ## [Running the stack on HSC data for a DESC PSF project](https://www.rubin.community/t/running-the-stack-on-hsc-data-for-a-desc-psf-project/964)
**Author:** [@joezuntz](https://www.rubin.community/u/joezuntz)\ **Replies:** 46\ **Last updated:** [August 3, 2017, 12:55am UTC](https://www.rubin.community/t/running-the-stack-on-hsc-data-for-a-desc-psf-project/964 "2017-08-03T00:55:12Z")
Hi all, For a DESC project on PSF requirements we have obtained some HSC data of a star field and will be measuring PSF fields on it. Ideally we'd like to do this using (parts of) the DM stack. This topic is to docu… --- ## [PSF matching of ExposureF image cutouts -- problem with xy0](https://www.rubin.community/t/psf-matching-of-exposuref-image-cutouts-problem-with-xy0/2010)
**Author:** [@aisun](https://www.rubin.community/u/aisun)\ **Replies:** 3\ **Last updated:** [June 26, 2017, 9:46am UTC](https://www.rubin.community/t/psf-matching-of-exposuref-image-cutouts-problem-with-xy0/2010 "2017-06-26T09:46:03Z")
I was trying to do PSF matching of image cutouts that I made for HSC coadd images but I encountered some error message: python modelPsfMatchTask.py --template 'stamp-i.fits' --science 'stamp-y.fits’ The error message… --- ## [Aligning images of PSFs](https://www.rubin.community/t/aligning-images-of-psfs/1771)
**Author:** [@fred3m](https://www.rubin.community/u/fred3m)\ **Replies:** 3\ **Last updated:** [April 7, 2017, 2:22am UTC](https://www.rubin.community/t/aligning-images-of-psfs/1771 "2017-04-07T02:22:54Z")
When extracting the psf (lsst.afw.detection.detectionLib.Psf) as an image (Psf.computeImage().getArray()) in each band for a set of calexps (lsst.afw.image.imageLib.ExposureF), while the calexps are spatially aligned, th… --- ## [What's a good way of debugging poor PSF estimation](https://www.rubin.community/t/whats-a-good-way-of-debugging-poor-psf-estimation/1023)
**Author:** [@mwv](https://www.rubin.community/u/mwv)\ **Replies:** 3\ **Last updated:** [August 18, 2016, 8:24pm UTC](https://www.rubin.community/t/whats-a-good-way-of-debugging-poor-psf-estimation/1023 "2016-08-18T20:24:34Z")
The image processing, and particularly the key first step of CR rejection, relies on a rough estimate of the PSF. This step often can go wrong and is confusing for new users. What's a good way of debugging the PSF esti…