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term | definition | link |
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HEASARC | (High Energy Astrophysics Science Archive Research Center) | HEASARC NASA page |
HMB or HMXB | (High-mass binary/High-mass X-ray binary) HMB systems consist of a compact object (neutron star or black hole) orbiting a high-mass normal star. The LAT sees a number of HMB systems, with orbital periods ranging from 4.8 hours (Cygnus X-3) to about 5 years (Eta Carinae). |
I
term | definition | link |
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IEM | Interstellar Emission Model | |
IGRB | Isotropic Gamma Ray Background | |
IRF | (Instrument Response Function) | Cicerone |
ISOC | (Instrument Science Operations Center) |
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term | definition | link |
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zenith | The point on the sky that is opposite to the Earth for the Fermi spacecraft. | (diagram from Wikipedia) (imagine the person is Fermi) |
zenith angle cut | The zenith angle cut defines the maximum zenith angle for all the photons that will be used in an analysis. The zenith angle cut is used to cut down on the emission from the Earth limb (the part of the Earth that is in the LAT field of view). | |
AG component