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- W3100472911 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° (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 few × 10-5 to a few × 10-2 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." @default.
- W3100472911 created "2020-11-23" @default.
- W3100472911 creator A5038369043 @default.
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- W3100472911 date "2006-08-01" @default.
- W3100472911 modified "2023-09-23" @default.
- W3100472911 title "A Comprehensive Search for Gamma‐Ray Lines in the First Year of Data from the<i>INTEGRAL</i>Spectrometer" @default.
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- W3100472911 doi "https://doi.org/10.1086/504967" @default.
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