Exoplanet and Astrobiology
==========================

-  **Just started**
-  **Help wanted**: I am not very familiar with this topic, but it
   clearly has become one of the most important field in astronomy.

--------------

Transient Detection
-------------------

-  `exoplanet - Fast & scalable MCMC for all your exoplanet
   needs <https://github.com/dfm/exoplanet>`__

   -  **exoplanet** is a toolkit for probabilistic modeling of transit
      and/or radial velocity observations of exoplanets and other
      astronomical time series using PyMC3.
   -  By `Dan Foreman-Mackey <https://dfm.io/>`__.

-  `pysyzygy - A fast and general planet transit (syzygy) code written
   in C and in Python <https://github.com/rodluger/pysyzygy>`__

-  `tls - An optimized transit-fitting algorithm to search for periodic
   transits of small planets <https://github.com/hippke/tls>`__

   -  By Michael Hippke. Based on this
      `paper <https://ui.adsabs.harvard.edu/abs/2019A%26A...623A..39H/abstract>`__
   -  **TLS** searches for transit-like features with stellar
      limb-darkening and including the effects of planetary ingress and
      egress

-  `planetplanet - A general photodynamical code for exoplanet light
   curves <https://github.com/rodluger/planetplanet>`__

   -  By `Rodrigo Luger <https://rodluger.github.io/>`__. A general
      photodynamical code for modeling exoplanet transits, secondary
      eclipses, phase curves, and exomoons, as well as eclipsing
      binaries, circumbinary planets, and more

-  `PyLDTk - Python Limb Darkening
   Toolkit <https://github.com/hpparvi/ldtk>`__

   -  a Python toolkit for calculating stellar limb darkening profiles
      and model-specific coefficients for arbitrary passbands using the
      stellar spectrum model library by Husser et al (2013)

-  `VESPA - Validation of Exoplanet Signals using a Probabilistic
   Algorithm <https://github.com/timothydmorton/VESPA>`__

   -  By Timothy Morton. It calculats false positive probabilities for
      transit signals

-  `juliet - a versatile modelling tool for transiting and
   non-transiting exoplanetary
   systems <https://github.com/nespinoza/juliet>`__

   -  By Néstor Espinoza. Based on the paper `Espinoza et
      al. 2018 <https://arxiv.org/abs/1812.08549>`__

-  `exonailer - Tools for fitting transiting exoplanet lightcurves and
   radial velocities <https://github.com/nespinoza/exonailer>`__

   -  By Néstor Espinoza. The EXOplanet traNsits and rAdIal veLocity
      fittER (**EXO-NAILER**), is an easy-to-use code that allows you to
      efficiently fit exoplanet transit lightcurves, radial velocities
      (RVs) or both.

-  `batman - Bad-Ass Transit Model
   cAlculatioN <http://astro.uchicago.edu/~kreidberg/batman/>`__

   -  **batman**, a Python package for fast calculation of exoplanet
      transit light curves.
   -  Based on `the paper by Laura
      Kreidberg <https://arxiv.org/abs/1507.08285>`__

Direct Imaging
--------------

-  `PynPoint - Pipeline for processing and analysis of high-contrast
   imaging data <https://github.com/PynPoint/PynPoint>`__

   -  **PynPoint** is a generic, end-to-end pipeline for the data
      reduction and analysis of high-contrast imaging data of planetary
      and substellar companions, as well as circumstellar disks in
      scattered light.
   -  `Online document can be found
      here <https://pynpoint.readthedocs.io/en/latest/>`__

-  `orbitize - Orbit-fitting for directly imaged
   objects <https://github.com/sblunt/orbitize>`__

Radial Velocity
---------------

-  `wobble - precise data-driven RV fitting, now with
   tellurics <https://github.com/megbedell/wobble>`__

   -  By `Megan Bedell <https://bedell.space/>`__ **wobble** is an
      open-source python package for analyzing time-series spectra. It
      was designed with stabilized extreme precision radial velocity
      (EPRV) spectrographs in mind, but is highly flexible and
      extensible to a variety of applications.

-  `radvel - General Toolkit for Modeling Radial Velocity
   Data <https://github.com/California-Planet-Search/radvel>`__

   -  Based on the publication by `Fulton et
      al. 2018 <https://arxiv.org/abs/1801.01947>`__

Planet Atmosphere
-----------------

-  `PandExo - A Community Tool for Transiting Exoplanet Science with the
   JWST & HST <https://github.com/natashabatalha/PandExo>`__

   -  Tools to help the community with planning exoplanet observations
   -  By `Natasha Batalha <https://natashabatalha.github.io/>`__