1. A fast and general planet transit (syzygy) code written in C and in Python.
pysyzygy computes fast lightcurves for the most general case of a massive, eccentric planet orbiting a limb-darkened star. Here's a sample output image of an assymetric transit:
Clone the repository and run
python setup.py install
... is super easy.
import pysyzygy as ps import numpy as np import matplotlib.pyplot as pl # Instantiate a transit object trn = ps.Transit(t0 = 0.5, RpRs = 0.1, per = 1.234) # Now evaluate the light curve on a grid of observation times t = np.arange(0., 3.5, ps.transit.KEPSHRTCAD) flux = trn(t) # Plot the light curve fig, ax = pl.subplots(figsize = (12, 5)) fig.subplots_adjust(bottom = 0.15) ax.plot(t, flux, 'b.') ax.set_xlabel('Time (days)', fontsize = 18) ax.set_ylabel('Relative flux', fontsize = 18) ax.margins(None, 0.5) pl.show()
More detailed documentation coming soon. For now, check out the examples directory for
some cool things you can do with
Feel free to change, adapt, or incorporate this code into your project, but please make sure to cite this repository, as well as Mandel and Agol (2002), the transit model on which
pysyzygy is based.