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This wiki is a brief guide on how to install, run, and troubleshoot barycorrpy (BCPy). BCPy is the Python version of Jason Eastman and Jason Wright's IDL code BaryCorr based on Wright & Eastman 2014 . BCPy can be used to calculate the barycentric velocity correction for a star with an accuracy of ~ 1 cm/s . To do this, it takes into consideration the following -

1. Revolution of the Earth to consider position and velocity of the Geo-Center (GC) wrt Solar System Barycenter (SSB)
2. Rotation of the Earth
3. Precession, Nutation and Polar motion of the Earth, along with 2. to calculate the position and velocity of the observatory wrt the Geo-Center.
4. Gravitational Time dilation due to objects of the Solar System - redshift due to difference between gravitational potential at infinity and in the Solar System.
5. Leap Second offset between UTC and TAI time standards
6. Proper motion and systemic radial velocity of the star
7. Parallax correction
8. Shapiro delay - extra path length due to light going in and out of Sun's gravitational well.

Contents :

• Installation
• Getting Started
• Dependencies
• FAQ
• Leap Second Management
• Error Management

Citation

To cite using this code you can cite this paper - [INSERT] Guidelines to cite this package can be found here.