Attendees: Joanne Bogart, Emmanuel Cephas, Jim Chiang, Richard Dubois, Tom Glanzman, Navid Golpayegani, Tony Johnson, Heather Kelly, Chuck Patterson, Leon Rochester, Tracy Usher, Eric Winter
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new GlastClassify tag from Leon is available, however, Bill has since spoken to Tracy concerning a discovery about some CAL energy cuts, which when an event fails, some variables are left to their initialized value such as the CTBParticleType variable which is set to zero (which also denotes a gamma). Tracy wants to move these cuts into the IM XML Analysis so that Bill can set the initialization values as he desires.
Random Overlay
Coming soon to a GR near you...
Richard mentioned that Philippe came by his office earlier and suggested it would be helpful to have a library of real events to draw from, which we could "overlay" onto an MC event. This may help study pile-up issues. Currently we are able to overlay noise, but the concept of overlaying an additional digi event from a ROOT file onto an event is new. This would certainly require some tweaks to RootIo and as Leon mentioned, some modification to TkrRecon where it gives preferential treatment to the highest hits, which in this case, may not be what you want.
Workbook
Chuck has updated the FRED documentation online to provide a better description of how to use the event display. In attempting to install FRED on a new windows box, Chuck ran into some terrible problems. It turns out the issue stemmed from using the current release on Ruby (1.8.6). When Chuck down-graded to 1.8.2, suddenly FRED functioned again. There are other reports on Linux, where users need to use 1.8.6 versus some older versions of Ruby. This makes it rather difficult to document how to get FRED installed. Chuck requests that we consider providing Ruby ourselves, to insure users grab the correct version. This is straightforward on Windows - it is not so clear what version of Ruby we should distribute for Linux.
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