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B. J. Teegarden (NASA/GSFC), P. Jean, G. K. Skinner (CESR), G. Weidenspointner (USRA/GSFC), D. Attie, B. Cordier (CEA/Saclay), R. Diehl (MPE/Garching), J. Knodlseder (CESR), S. Schanne (CEA/Saclay), C. Shrader, S. Sturner (USRA/GSFC)
The Spectrometer for INTEGRAL (SPI) is a sensitive high-resolution gamma-ray spectrometer operating in the energy range from 20 to 8000 keV. Extensive pre-launch studies of the background were performed and sensitivity calculations were made based on these calculations. Now there is real in-flight data with which to analyze the background, compare with simulations and update the sensitivity. This poster will present the current instrumental background levels, present and discuss the variability of this background and it's impact on the observations and give the latest values of the instrument sensitivity.
Bulletin of the American Astronomical Society,
© 2003. The American Astronomical Soceity.