So I was trying to make a drizzled image with 40 WFC-3(F814W) FLT files. For the step of CR rejection, I used 'driz_cr_snr = 3.5 3.0', drizzle_cr_scale=1.2, 0.7, driz_cr_grow = 1, driz_cr_ctegrow=0. However, when I checked the final output, there are still some "spikes" extending from both sides of some bright sources.
I checked each individual _blt and _crclean image, and found the CR masks work pretty well. Therefore, I wonder if this is affected by cosmic ray or some other effects (CTI trails, source saturation, etc.)
If it is indeed because of cosmic ray, can anyone give me any suggestions on the parameters I should have used? I attached the image I got for your reference.