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1. Run gtselect with time selection and NO selection on photon class then run fselect to select diffuse class photons

gtselect infile=../list outfile=stepone_gtselect_allclasses_timeselection.fits ra=0.0 dec=0.0
rad=180.0 tmin=306288800 tmax= 309315444 emin=10.0 emax=

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1e7 zmax=180.0
fselect infile=stepone_gtselect_allclasses_timeselection.fits outfile=stepone_gtselect_allclasses_timeselection_fselect_EVENT_CLASS_3.fits
expr="(EVENT_CLASS==3)" clobber=yes

1. Run gtselect with NO time selection and NO selection on photon class then run fselect to select diffuse class photons

gtselect infile=../list outfile=steponesteptwo_gtselect_allclasses_timeselectionnotimeselection.fits ra=0.0 dec=0.0
 rad=180.0 tmin=306288800INDEF tmax=INDEF 309315444 emin=10.0 emax=1e7 zmax=180.0
fselect infile=steponesteptwo_gtselect_allclasses_timeselectionnotimeselection.fits outfile=steponesteptwo_gtselect_allclasses_timeselectionnotimeselection_fselect_EVENT_CLASS_3.fits
 expr="(EVENT_CLASSCLA
SS==3)" clobber=yes=180.0 

1. Run gtselect with NO time selection and NO selection on photon class then run fselect to select diffuse class photonsRun gtselect with time selection and selection on photon class class 

gtselect infile=../list outfile=stepthree_gtselect_evclsmin_3_timeselection.fits ra=0.0 dec=0.0 rad=180.0 tmin=306288800 tmax= 309315444 emin=10.0 emax
=1e7 zmax=180.0 evclsmin=3

1. Run gtselect with NO time selection but with selection on photon class
2. Run fselect to select diffuse class photons then use ft1merge to merge files
3. Run fselect to select diffuse class photons then use gtselect to merge files