Perform PSF photometry

[Gabriel-p]

• Main article: https://photutils.readthedocs.io/en/stable/psf.html

• photutils-datasets

  1. PSF Photometry in Crowded Fields with Photutils
  2. PSF/PRF Photometry on Spitzer Data
  3. PSF photometry on artificial Gaussian stars

• Uncertainties

  1. issue
  2. example

• Generate PSF model from stars in frame? (Use photutils source detection in Spitzer PRF photometry notebook astropy/photutils-datasets#4)

• Do the *PSFPhotometry classes replace IRAF's allstar?

• Aperture correction?

• Summarized points: GUIDE TO COMPUTING A PSF IN A CROWDED FIELD