README.rst

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.