galight - Galaxy shapes of Light

A python package that analyze and model the imaging data of galaxies, QSOs and duals.

Installation

$ pip install galight --user

Alternatively, the package can be installed through github channel: https://github.com/dartoon/galight

Requirements

Running galight requires the following packages to be installed.

• lenstronomy https://github.com/sibirrer/lenstronomy

• astropy https://github.com/astropy/astropy

• photutils https://github.com/astropy/photutils

• regions https://github.com/astropy/regions

and related ones to be installed…

Example notebooks

We have created notebooks to demonstrate how to use galight. These notebooks demonstrate how to model QSOs and galaxies using 2D Sersic profile and scaled point source, based on lenstronomy lenstronomy.

Examples including:

• Modeling a HSC imaged QSO

• Modeling a HSC imaged dual QSO

• Modeling a HST imaged QSO

Features

The notebook demonstrates the follwing feature/functions:

• Search PSF stars through entire field of view, automatically.

• Cutout the target object and prepare the materials for the modelling.

• Estimate the background noise level from empty regions.

• Estimate the global background light and remove.

• Detecting objects in the cutout stamp and quickly create Sersic keywords (in lenstronomy type) to model them.

Contents:

• Installation
• Usage
  • Getting started
• galight package
  • Subpackages
• Contributing
  • Types of Contributions
  • Get Started!
  • Pull Request Guidelines
  • Tips
• Credits
  • Development Lead
  • Contributors
• History
  • 0.0.0 (2021-05-31)
  • 0.1.0 (2021-11-16)
  • 0.1.1 (2021-11-16)
  • 0.1.2 (2021-12-06)
  • 0.1.3 (2021-12-15)
  • 0.1.4 (2021-12-23)
  • 0.1.5 (2022-03-09)
  • 0.1.6 (2022-04-18)
  • 0.1.7 (2022-05-30)
  • 0.1.8 (2022-07-16)
  • 0.1.9 (2022-07-18)

Feedback

If you have any suggestions or questions about using galight feel free to email me at xuheng.ding@ipmu.jp.

If you encounter any errors or problems with galight, please let me know! Open an Issue at the GitHub http://github.com/dartoon/galight main repository.

Citation

@ARTICLE{2020ApJ...888...37D,
author = {{Ding}, Xuheng and {Silverman}, John and {Treu}, Tommaso and {Schulze}, Andreas and {Schramm}, Malte and {Birrer}, Simon and {Park}, Daeseong and {Jahnke}, Knud and {Bennert}, Vardha N. and {Kartaltepe}, Jeyhan S. and {Koekemoer}, Anton M. and {Malkan}, Matthew A. and {Sanders}, David},
title = "{The Mass Relations between Supermassive Black Holes and Their Host Galaxies at 1 < z < 2 HST-WFC3}",
journal = {\apj},
keywords = {Galaxy evolution, Active galaxies, 594, 17, Astrophysics - Astrophysics of Galaxies},
year = 2020,
month = jan,
volume = {888},
number = {1},
eid = {37},
pages = {37},
doi = {10.3847/1538-4357/ab5b90},
archivePrefix = {arXiv},
eprint = {1910.11875},
primaryClass = {astro-ph.GA},
adsurl = {https://ui.adsabs.harvard.edu/abs/2020ApJ...888...37D},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}