Pr

1
Sources detection method used at Saclay
MR_filter SExtractor (current placeholder in
catalog pipeline). Already applied at DC1 (J.
Ballet presentation at closeout) http//www-glast
.slac.stanford.edu/software/Workshops/Feb04DC1Clos
eOut/agenda.htm Optimal filter method. developed
by J. Ballet. Already applied at DC1 (same
presentation as above) 3D wavelet filtering
(space energy or time). developed by J.L.
Starck. Some ideas presented in J.L. Starck's
summary talk in May 2005 http//www-glast.slac.st
anford.edu/ScienceTools/workshops/May05DiffuseCat/
agenda.htm
My modest contribution for DC2 use a 2d binned
Poisson likelihood
2
Use the Egret fortran program LIKE (1994) J.R.
Mattox, D.J. Macomb, D.L.Bertsch, J.A. Esposito
Why ?
I already used it on Egret data. Not fancy but it
works very well. Fast. Adjust the diffuse
emission model (Gmult, Gbias). Characterisation
not as good as 3d models. Alternative method for
the catalog.
3
What have I done so far ?
Developped a cpp wrapper for Like Like
likenew Like (counts_g12_30_g002.fits,2,cfgas
.gal.g002b,20) like-gtSet_ROI
(60,120,-90,90) like-gtSet_Sources
("sources_gal_g004b_17.list") like-gtSet_PSFADJ
("MA0") like-gtSet_PSFADJ ("MAR") like-gtdo_LM
(0.05,25,y","LM_Output") delete like Run
Like with the 1997 (P14) and 2001
(P19-reprocessed) Egret data Combined it with
Sextractor to detect the likelihood map
excess Code to merge results from all maps
(gal,eq, energies, zones, periodes) into a catalog
4
Results with Egret data and diffuse emission
All the sources in catalog were found. Found 12
new sources (not in catalog nor in Egret lower
sign. source list)
82 (80) catalog sources are not any more
significant. 61 (70) new significant sources
should appear in the catalog.
5
To do list for DC2 Adapt Like for resolution
other than 0.5 deg. Generate Like-PSF file from
DC2 PSF Counts and Exposure maps (weeks, days,
energy bands) Galactic diffuse emission map Run
it (1308 cpu at In2p3 cc-Lyon )