Data Reduction Frequently Asked Questions

My science result looks smeared out.


In some cases sph_zpl_star_center_img (sph_zpl_star_center_pol) will not find the waffle spots as the detection threshold of 10σ is too high. In such a case sph_zpl_science_imaging (sph_zpl_science_p1, sph_zpl_science_p23) will rotate the frames around an incorrect position which will smear out the signal. If you see such behaviour you may try to reduce star_center_img.sigma (star_center_pol.sigma) to 5 and rerun the 2 recipes.