read_objmask

I wrote a code to read objmask info for SDSS objects from the fpatlas files. This came down to modifying the atlas reading code to get multiple objects and copy their objmask info into an output structure. I then linked this to IDL using the DLM mechanism.

I was motivated to do this because we are going to start working on intracluster light in the MaxBCG and Percolation clusters. This gives a first look at the area associated with each object in a frame, which we will need to mask out in order to measure just the ICL. We will probably use a different area once we decide on the best masking algorithm.

Erin