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Observations of the central radian of the Galaxy by the Reuven Ramaty HighEnergy Solar Spectroscopy Imager (RHESSI) have yielded a high-resolutionmeasurement of the 1809 keV line from 26Al, detected at 11 sigma significancein nine months of data. The RHESSI result for the width of the cosmic line is2.03 (+0.78, -1.21) keV FWHM. The best fit line width of 5.4 keV FWHM reportedby Naya et al. (1996) using the Gamma-Ray Imaging Spectrometer (GRIS) ballooninstrument is rejected with high confidence.Comment: 9 pages, 1 figure, accepted by The Astrophysical Journal Letter

The Reuven Ramaty High Energy Solar Spectroscopic Imager Observation of the 1809 keV Line from Galactic 26 Al

The Reuven Ramaty High Energy Solar Spectroscopic Imager Observation of the 1809 keV Line from Galactic ²⁶ Al