Difference between revisions of "Galactic latitude and Source Cuts"
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Once good Fermi data in the desired energy range is selected, we proceed to narrow our focus on photons with galactic latitude b above 50deg or below -50deg. The following Python script accomplishes this goal: | Once good Fermi data in the desired energy range is selected, we proceed to narrow our focus on photons with galactic latitude b above 50deg or below -50deg. The following Python script accomplishes this goal: | ||
| − | [[Media:bcut.py]] | + | [[Media:bcut.py]]. After running this script on each of the files obtained from noroi.sh, we obtain the following datafiles containing photons only in the polar caps [[Media:bcutoutput.tar.gz]] |
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== Removing regions around Fermi sources == | == Removing regions around Fermi sources == | ||
Revision as of 19:57, 19 May 2014
Galactic latitude selections
Once good Fermi data in the desired energy range is selected, we proceed to narrow our focus on photons with galactic latitude b above 50deg or below -50deg. The following Python script accomplishes this goal: Media:bcut.py. After running this script on each of the files obtained from noroi.sh, we obtain the following datafiles containing photons only in the polar caps Media:bcutoutput.tar.gz
Removing regions around Fermi sources
We use the First Fermi-LAT Catalog of Sources above 10 GeV (1FHL). (Note that this is not the 1st-year Fermi catalogue, and it is actually more recent than the 2nd-year Point Source catalogue. See the link for a description).
The following Python script takes the data within the polar caps selected above and discards any photon therein that falls within a circular region of radius 1.5deg centered at the position of any source listed in the 1FHL catalogue. Media:nosource.py
