RHESSI calibrate Ulysses Hugh Hudson. Ulysses background Small scintillation counter in solar polar orbit at 5+ AU apogee Launch in 1990 Many nice solar.

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Presentation transcript:

RHESSI calibrate Ulysses Hugh Hudson

Ulysses background Small scintillation counter in solar polar orbit at 5+ AU apogee Launch in 1990 Many nice solar observations reported by Kane and McTiernan over the years We can calibrate against RHESSI, as reported here

The GRB detector. Note the hemispherical scintillator design, aimed at getting isotropic response.

Nominal 50% energy 25 keV PHA edge Model GRB pulse-height distributions, MK

Comparison for keV

Linear Log RHESSI + GOES

Conclusions Ulysses fluxes compare fairly well with RHESSI Pileup is not a problem, although thermal feedthrough is The calibration of Ulysses resolution may be off a bit