I'm trying to calculate the centroid of a star image: I'm fitting a 2D Gaussian with least squares in order to get the centroid of the star with sub-pixel accuracy. And, in fact, I get a float number for the coordinates X and Y of the centroid using https://photutils.readthedocs.io/en...oid_2dg.html#photutils.centroids.centroid_2dg Now I want to test this algorithm with different position of the real centroid and compare them with the calculated centroid, but I don't know how to "move" the centroid within sub-pixel accuracy. I only know how to move it in a pixel order. Continue reading...
