Jirachi - Julia project for analyzing variability in active galaxies harboring massive black holes

About this project

Several functions can be found in this project to help us get a better understanding of the central engine of AGNs:

• timescale-dependent color variation (CV) calculation.
• structure-function (SF) calculation and fits.
• generate stochastic process light curves.
• fractional variability.
• ...

A JULIA version for calculating SF and color variation can be found at run_demo.jl. Read the full documentation here.

A PYTHON version for calculating SF and color variation can be found at run_demo.py, tested through Python 3.8.8.

Run & plot it!

TODO:

• reprocessing model
• structure function calculation (see kozlowski+16)
• update the tutorial ...
• lag calculation, mainly convert PYCCF to julia version

Install

julia> # Press the key "]"

(@v1.9) pkg> add https://github.com/wssuzb/Jirachi.jl.git
julia> using Jirachi

or alternatively, you can also download this Jirachi.jl-main.zip file, and load it by

julia> push!(LOAD_PATH, "'~/where/you/download/the/package/Jirachi")
julia> using Jirachi

enjoy!

Citing

If this project makes your life easier, please cite this code below:

• A new timescale-mass scaling for the optical variation of active galactic nuclei across the intermediate-mass to supermassive scales

@misc{su2024new,
      title={A new timescale-mass scaling for the optical variation of active galactic nuclei across the intermediate-mass to supermassive scales}, 
      author={Zhen-Bo Su and Zhen-Yi Cai and Mouyuan Sun and Hengxiao Guo and Wei-Min Gu and Jun-Xian Wang},
      year={2024},
      eprint={2405.02584},
      archivePrefix={arXiv},
      primaryClass={astro-ph.GA}
}

or

@software{jirachi,
  author       = {Su, Zhen-Bo},
  title        = {{Julia project for analyzing variability in active 
                   galaxies harboring massive black holes}},
  month        = dec,
  year         = 2023,
  publisher    = {Zenodo},
  version      = {v0.0.1},
  doi          = {10.5281/zenodo.10428783},
  url          = {https://doi.org/10.5281/zenodo.10428783}
}

also see CITATION.bib for the relevant reference(s).