photutils

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larrybradley

Units of aperture photometry output table

2

I expected that aperture_photometry -- when fed data in units of MJy/sr and aperture radii in arc seconds -- would output in some units that integrate over area. Instead, the...

hcferguson

EPSFbuilder doesn't seem to be re-centering sources properly resulting in "dotted" PSF centers

2

We're attempting to use the epsfbuilder function to extract, re-sample, re-center, and combine psf stars in our galaxy pointings to output an empirically determined psf. - When the oversampling is...

mfloyd21

Evaluate grid PSF on a subset?

4

How can I run PSF photometry on a cutout of an image using a gridPSF model? There's probably some clever way to wrap the `grid.__call__` to give it an offset,...

keflavich

I am trying to fit isophotes to multiple images of galaxies. For each galaxy image, there are multiple images of that galaxy itself but in different filters. I mask out...

shruti-ramaiya

ImageSegmentation: include option to provide pixel coordinates and extract the segment that corresponds to it

2

Image Segmentation is useful for masking sources in an astronomical image and sometimes this masking option involves having to remove certain segments e.g. galaxies in the image before creating a...

shruti-ramaiya

WARNING: No meaningful fit was possible. [photutils.isophote.ellipse] error when slightly changing galaxy centre

2

I am currently using photutils Ellipse() method to fit isophotes around galaxies. I am set to run the code on many galaxy images but for now I am just experimenting...

shruti-ramaiya

IterativePSFPhotometry: high memory usage due to a deepcopy?

3

Thanks for developing the `PSFPhotometry` and `IterativePSFPhotometry` classes! I have been using them to extract stars from JWST images and they appear to be working quite well. However, I noticed...

mwhosek

Convolution with segmentation.make_2dgaussian_kernel for image segmentation

1

Hi, I have been working on a pipeline for photometry and recently came across this issue (reproducible code has been attached at the end):  convolution enhancement = convolved data...

astqx

Ellipse method with geometry argument just getting stuck and not loading all of a sudden in Jupyter notebook

4

I am doing an analysis that involves using fitting elliptical isophotes around galaxy images for which I am using photutils For a galaxy image, I first begin by using the...

shruti-ramaiya