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Date and Time of the Query: 2019-06-19 T12:16:06 PDT
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For refcode 2006ApJ...646..965T:
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NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2006ApJ...646..965T A Comprehensive Search for Gamma-Ray Lines in the First Year of Data from the INTEGRAL Spectrometer B. J. Teegarden and K. Watanabe Abstract. We have carried out an extensive search for gamma-ray lines in the first year of public data from the spectrometer (SPI) on the INTEGRAL mission. INTEGRAL has spent a large fraction of its observing time in the Galactic plane with particular concentration in the Galactic center (GC) region (~3 Ms in the first year). Hence the most sensitive search regions are in the Galactic plane and center. The phase space of the search spans the energy range 20 -- 8000 keV and line widths from 0 to 1000 keV (FWHM). It includes both diffuse and pointlike emission. We have searched for variable emission on timescales down to ~1000 s. Diffuse emission has been searched for on a range of different spatial scales from ~20 deg (the approximate field of view of the spectrometer) up to the entire Galactic plane. Our search procedures were verified by the recovery of the known gamma-ray lines at 511 and 1809 keV at the appropriate intensities and significances. We find no evidence for any previously unknown gamma-ray lines. The upper limits range from a fewx10^-5^ to a few x10^-2^ cm^-2^ s^-1^ depending on line width, energy, and exposure; regions of strong instrumental background lines were excluded from the search. Comparison is made between our results and various prior predictions of astrophysical lines. Key words: Gamma Rays: Observations
Retrieve 43 NED objects in this reference.
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