Though it isn't designed for it, I thought I'd try out John's application on the Messier objects:
1). Created a new subdirectory
2). placed a copy of the app in that
3). place Messier_targets in that directory and renamed to SNeTargets
4). ran the survey
The 2nd file is also an input to the survey. About 400 targets of galaxies 11Mag or brighter. Just place in directory with the app and rename to SNeTargets.
Anyone else have input files to share for this app?