Run16 dAu last two days' data:
    - Large cell detectors are ok, there are issues with small cell detectors.
    - Those bad fit channels in small cell detectors can be grouped: 
           1. Probably can be converged in the future iteration, the peak looks ok: badch2.pdf
           2. Invariant mass distribution looks bad: badch1.pdf

By using pAl's gaincorr as input:BadCh_list.pdf