README

This version of EightBitTransit is an MIT-licensed python code redesigned to make use of GPU parallelization with Numba:

1. Can calculate the light curve of any pixelated image transiting a star;
2. Can invert a light curve to recover the "shadow image" that produced it.

Installation

To install EightBitTransit, download this directory, navigate to it, and run:

pip install .

Dependencies

• Numpy
• Scipy
• Numba
• imageio
• itertools
• matplotlib

Optionally (for the example notebook):

• jupyterlab

Examples

See ./examples/examples-gpu.ipynb for examples of both the forward and inverse shadow imaging problem, including for dip 5 of Boyajian's Star. This code reproduces figure 12 of Sandford & Kipping 2018 (https://arxiv.org/abs/1812.01618).

Note on memory

Repeated TransitingImage() calls can cause python to run out of memory in certain cases (thanks to textadactyl for pointing this out!)--when you are done with a TransitingImage object, deallocate it explicitly, i.e.:

ti = TransitingImage(...)

some operations on ti, etc.

ti = None