Other
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.3407m&link_type=abstract
American Astronomical Society, 180th AAS Meeting, #34.07; Bulletin of the American Astronomical Society, Vol. 24, p.784
Other
Scientific paper
The Oriented Scintillation Spectroscopy Experiment (OSSE) on the Compton Gamma Ray Observatory is comprised of 4 independently-oriented large-area ( ~ 500 cm(2) /detector at 511 keV) NaI detectors covering the energy range from 0.050 to 10 MeV. Solar observations are typically performed with two of the detectors staring at the Sun and two alternating between viewing the Sun and viewing background regions on two-minute timescales. In June of 1991, OSSE observed 4 of the X10+ flares from Active Region 6659. Intense gamma-ray line emission at 0.511 MeV (positron annihilation) and 2.223 MeV (neutron capture), and from several deexcitation lines of carbon and oxygen were recorded. Using a combination of data from sunward-pointing and off-pointing detectors to avoid saturation effects during the intense portions of the flares, background-subtracted spectra have been obtained. These spectra were fit to derive photon fluxes for the above-mentioned gamma-ray lines. Preliminary lower limits to the integrated fluxes in the 2.223 MeV line (not accounting for saturation effects and based on data collected only during the OSSE observation times) are about 300, 200, 30 and 100 photons/cm(2) for the June 4, 6, 9 and 11 flares, respectively. This is to be compared to a fluence of about 300 photons/cm(2) for the 1982 June 3 flare observed by the SMM Gamma-Ray Spectrometer. Integrated fluxes for the other lines will be presented and compared to line flux measurements of flares obtained with the SMM/GRS. This work is supported under NASA contract S10987C.
Cameron Robert
Frye G.
Grabelsky David
Grove Eric J.
Jenkins Teresa
No associations
LandOfFree
GRO/OSSE Observations of Nuclear Line Emission from the Intense Flares of June 1991 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with GRO/OSSE Observations of Nuclear Line Emission from the Intense Flares of June 1991, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and GRO/OSSE Observations of Nuclear Line Emission from the Intense Flares of June 1991 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1512769