EGamma exercise

This exercise provdes an introduction to CMS electron and photon objects. It is used as part of:

• CMSDAS 2024
• CMSDAS 2023
• CMSDAS 2020
• LPC HATS 2020
• CMSDAS 2020

To setup the exercise environment, choose a 3-digit number to replace the three instances of xxx below, and execute:

# connect to LPC with a port forward to access the jupyter notebook server
# remember to `kinit USERNAME@FNAL.GOV` to set up kerberos authorization before logging in
ssh USERNAME@cmslpc-sl7.fnal.gov -L8xxx:localhost:8xxx

# create a working directory and clone the repo
cd nobackup # if this symlink does not exist, look for /uscms_data/d1/$USER
git clone git@github.com:gracecummings/CMSDAS_EGamma.git
cd CMSDAS_EGamma

# in case you do not already have this in your .bashrc (or equivalent) please run
source /cvmfs/cms.cern.ch/cmsset_default.sh

# this script sets up the python environment, only run once
./setup.sh

# this enables the environment, run it each login (csh users: use activate.csh)
source egammaenv/bin/activate

# this gives you permission to read CMS data via xrootd
voms-proxy-init --voms cms --valid 100:00

jupyter notebook --no-browser --port 8xxx

There should be a link like http://localhost:8xxx/?token=... displayed in the output at this point, paste that into your browser. You should see a jupyter notebook with a directory listing. Open exercise.ipynb.