deletions | additions       diff --git a/subsubsectionImages_.tex b/subsubsectionImages_.tex  index 7ba34be..eac3d2a 100644  --- a/subsubsectionImages_.tex  +++ b/subsubsectionImages_.tex 
...
others in that section ``no''. Then go down further and change the  {\tt zero} parameter to the name of the bias file (which should be  {\tt bias.fits}). To exit, type {\tt :q}. To run ccdproc on an image  (say bob.fits), type {\tt ccdproc bob.fits}. {\color{red}You can also run {\tt ccdproc} from the parameters screen by typing {\tt :g}.}  Do this for all the cluster images. The flat fields have already been   bias subtracted, so it is not necessary to process them in this way.