This code is firstly used to determine the centers of the stars for the HST-STIS coronagraphic archive (Ren et al. 2017).

Checkout the code from this Github repository. Then open up a terminal window and navigate to the directory for this package. Run the following command to have an installation that will evolve with the development of this codebase.

$ python setup.py develop

import radonCenter
(x_cen, y_cen) = radonCenter.searchCenter(image, x_ctr_assign, y_ctr_assign, size_window = image.shape[0]/2)

1. image: 2d array.
2. x_ctr_assign: the assigned x-center, or starting x-position; for STIS, the "CRPIX1" header is suggested.
3. y_ctr_assign: the assigned y-center, or starting y-position; for STIS, the "CRPIX2" header is suggested.
4. size_window: half width of the window to generate the cost function; for STIS, half the length of the image is suggested.

Pueyo, L., Soummer, R., Hoffmann, J., et al. 2015, ApJ, 803, 31

Ren, B., Pueyo, L., Perrin, M. D., Debes, J. H, & Choquet, É. 2017, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 10400, 1040021