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[14.03] A Comprehensive Search for Unpredicted Gamma-ray Lines with INTEGRAL/SPI

K. Watanabe (NASA/GSFC/UMD), B.J. Teegarden (NASA/GSFC)

ESA's INTEGRAL mission was launched in October, 2002. The on-board Spectrometer SPI is the most sensitive high resolution gamma-ray spectrometer thus far flown in space. We have undertaken a global search of the first year of the SPI data for unpredicted gamma-ray lines. We utilize the SPIROS software to obtain individual spectra from point sources on the Bright Source Catalog available at http://lheawww.gsfc.nasa.gov/users/beckmann/INTEGRAL_bright_sources.html. We also search for lines from diffuse emission using the light bucket method with careful background subtraction. We find no new significant astrophysical lines. Our upper limits vary between a few X 10^-5cm^-2s^-1 and a few X 10^-3cm^-2s^-1 depending on line energy, width and exposure.

The author(s) of this abstract have provided an email address for comments about the abstract: watanabe@lheapop.gsfc.nasa.gov

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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.