One of the conclusions from PIPE2D-1059 is that illumination of PFI donuts is more extended that illumination of DCB donuts for fibers at the edge of the focal plane (center of the detector). This is opposite from predictions that stipulate that he flux should be more concentrated
We are now in processing of verifying all possible sources of errors and confusions that may arise. One issue might be that DCB and PFI images have been taken with a very large time separation. This ticket is to retake DCB images in order to verify that our results still hold and that the differences are not due to some sort of time evolution of the DCB donut images.
Fiber 360 is the ``example'' fiber in which the discrepancy is most readily seen. That is why we suggest DCB illumination with 21 fiber configuration on r1 in order to illuminate that particular fiber (as well as many others as possible).