(Another aPERture Photometry code in pYthon)
Aperpy is a front-to-back aperture photometry pipeline written in python aimed at deep space-based galaxy fields. It uses pythonic Source Extractor (SEP, Barbary et al. 2016) to detect sources in a noise-equalized (i.e. inverse variance weighted) detection image, resamples images to a common pixel scale, builds emperical PSFs from point sources and corresponding matching kernels, measures photometry in a number of apertures including Kron-like 'AUTO' ellipses, auto-selects the most suitable aperture for a given source size, flags stars and artifacts, prepares ready-to-use output catalogs, and even run EAZY (Brammer et al. 2008). A number of diagnostic figures are provided as output.
Methodology was adapted mainly from Whitaker et al. 2011 and Labbe et al. 2003. Currently it is designed for use with JWST and HST data, although extensions are possible.
This software is being actively developed. Comments, questions, and pull requests are welcome. We strongly recommend that interested users get in touch with us before diving in: [email protected]. Install is as simple as downloading this repository and installing dependecies as necessary. Please see the 'requirements.txt' file for dependecies. The 'bin/examples.py' file provides an example of how aperpy may be used, with user configuration hosted in 'config/config.py'.
If you use the software, please cite Weaver et al. 2023:
@ARTICLE{Weaver2023, author = {{Weaver}, John R. and {Cutler}, Sam E. and {Pan}, Richard and {Whitaker}, Katherine E. and {Labbe}, Ivo and {Price}, Sedona H. and {Bezanson}, Rachel and {Brammer}, Gabriel and {Marchesini}, Danilo and {Leja}, Joel and {Wang}, Bingjie and {Furtak}, Lukas J. and {Zitrin}, Adi and {Atek}, Hakim and {Coe}, Dan and {Dayal}, Pratika and {van Dokkum}, Pieter and {Feldmann}, Robert and {Forster Schreiber}, Natascha and {Franx}, Marijn and {Fujimoto}, Seiji and {Fudamoto}, Yoshinobu and {Glazebrook}, Karl and {de Graaff}, Anna and {Greene}, Jenny E. and {Juneau}, Stephanie and {Kassin}, Susan and {Kriek}, Mariska and {Khullar}, Gourav and {Maseda}, Michael and {Mowla}, Lamiya A. and {Muzzin}, Adam and {Nanayakkara}, Themiya and {Nelson}, Erica J. and {Oesch}, Pascal A. and {Pacifici}, Camilla and {Papovich}, Casey and {Setton}, David and {Shapley}, Alice E. and {Smit}, Renske and {Stefanon}, Mauro and {Taylor}, Edward N. and {Weibel}, Andrea and {Williams}, Christina C.}, title = "{The UNCOVER Survey: A first-look HST+JWST catalog of 50,000 galaxies near Abell 2744 and beyond}", journal = {arXiv e-prints}, keywords = {Astrophysics - Astrophysics of Galaxies}, year = 2023, month = jan, eid = {arXiv:2301.02671}, pages = {arXiv:2301.02671}, doi = {10.48550/arXiv.2301.02671}, archivePrefix = {arXiv}, eprint = {2301.02671}, primaryClass = {astro-ph.GA}, adsurl = {https://ui.adsabs.harvard.edu/abs/2023arXiv230102671W}, adsnote = {Provided by the SAO/NASA Astrophysics Data System} }