================================================================================
Title: A Dynamical Mass of 70 {+/-} 5 M_Jup_ for Gliese 229B, 
       the First T Dwarf 
Authors: Brandt T.D., Dupuy T.J., Bowler B.P., Bardalez Gagliuffi D.C.,
         Faherty J., Brandt G.M., Michalik D. 
================================================================================
Description of contents: A .fits file containing the MCMC chain that forms 
 the basis of Figures 3-6 and Table 4.

System requirements: Any FITS capable reader.

Additional comments: The FITS file has three extensions. The first is
 the chain of parameters itself.  It is of the shape (nwalkers, nsteps,
 npar); nwalkers is 100 and nsteps is 100000 after thinning. Every
 500th step is saved in the chain given here due to space contraints
 (every 50th step was used in the published plots). The parameters
 are, in order (with all orbital elements referring to the secondary),

 1. Radial velocity jitter (m/s)
 2. Host star mass (Solar masses)
 3. Companion mass (Solar masses)
 4. Semimajor axis (AU)
 5. sqrt(eccentricity)*sin(omega)
 6. sqrt(eccentricity)*cos(omega)
 7. Inclination (radians)
 8. PA of the ascending node (radians)
 9. Mean longitude at 2010.0 (radians)
 
 The second FITS extension contains the natural logarithm of the
 unnormalized posterior probability density.  Its shape is (nwalkers,
 nsteps).

 The third FITS extension contains additional information computed at
 each step.  It is of the shape (nwalkers, nsteps, nextra).  All
 quantities are calculated at the corresponding values of the
 parameters in the first FITS extension.  They are, in order,

 1. Maximum likelihood parallax given this set of parameters (arcseconds)
 2. Maximum likelihood RA barycenter proper motion (arcseconds/year)
 3. Maximum likelihood Dec barycenter proper motion (arcseconds/year)
 4. Chi squared for relative separation
 5. Chi squared for position angle
 6. Chi squared for Hipparcos proper motions
 7. Chi squared for Hipparcos-Gaia mean proper motions
 8. Chi squared for Gaia DR2 proper motions
 9. Radial velocity zero point (m/s)

================================================================================
