photutils
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astropy
Astropy package for source detection and photometry. Maintainers: @larrybradley and @bsipocz
I tried to obtain the star PSF for a very large image of HST. The original image was huge, I tried to obtain the stars first and put them into...
Hello again Ivo, Larry, Brigitta and others Michele (@cantiello) and I are also facing another problem while running the fit_image routine. You have already provided an option in EllipseGeometry to...
Hello Ivo, Larry, Brigitta and others My advisor Michele Cantiello ( @cantiello) and I have been working on ~3500x3500 pixel FITS images of bright, extended elliptical galaxies in which we...
Hi Developers, I'm trying to do a `BasicPSFPhotometry` with a poisson-noise-added galaxy image (the galaxy image is created in `GalSim`, and the noise is either added in `GalSim` or the...
Let's consider this work flow: 1. Select one star. 2. Construct a 2D model (e.g., `Gaussian2D`, `Moffat2D`, or a non-existent `Lorentz2D`). 3. Feed the model some rough initial estimates. 4....
Hi, Sometimes I would like to extract surface brightness profiles using the pre-defined ellipses, just like iraf.ellipse(inellip='XXX.tab') does. Could this inellip parameter be added to fit_image method? Thanks!
If I `import photutils` and try to use `photutils.utils.calc_total_error`, I get an `AttributeError: module 'photutils.psf.utils' has no attribute 'calc_total_error'`. If instead I explicitly import the function (`from photutils.utils import calc_total_error`,...
Currently, [``_prepare_photometry_data``](https://github.com/astropy/photutils/blob/master/photutils/aperture/_photometry_utils.py#L66) or [``do_photometry``](https://github.com/astropy/photutils/blob/master/photutils/aperture/core.py#L315) takes error as standard deviation, while they convert the error to the variance map. This, however, can be simplified by accepting the user to provide variance...
Currently the PSF photometry in photutils accepts the sky estimator as `bkg_estimator`. But in PSF photometry process, as far as I understand, we have to subtract the sky from regional...
HI! I'm having some problems to get the same output as SExtractor using photutils package. I was wondering if I could receive any help with this issue. I'm trying to...
