Physics
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.339..122t&link_type=abstract
Nature (ISSN 0028-0836), vol. 339, May 11, 1989, p. 122, 123.
Physics
39
Gamma Ray Spectra, Light Curve, Spectral Resolution, Supernova 1987A, Continuous Spectra, Doppler Effect, Imaging Spectrometers, Line Spectra
Scientific paper
Observations of supernova 1987A from the maiden flight of the Gamma-Ray Imaging Spectrometer (GRIS) are reported. SN1987A was observed for a period of 11.1 hours on May 1, 1988. Line emission at 1238 keV and continuum emission from 60-800 keV were detected. A gaussian line profile gives an acceptable fit to the 1238 keV line. The best-fit parameters are: flux = 8.5(+ 2.3, - 2.2) x 10 to the -4th photons/sq cm/s; peak energy = 1235.4 (+ 2.2, - 2.4) keV; FWHM = 16.3 (+ 6.1, - 5.7) keV. No evidence is found for a supernova-produced red- or blueshift in the 1238 keV line. The measured linewidth is a factor of about two greater than model predictions, although the discrepancy represents only two standard deviations. The line profiles are characteristic of optically thin regions, whereas the intensity implies a mean optical depth of about two. Fragmentation or nonspherical geometry of the supernova shell are possible explanations of the data.
Barthelmy Scott D.
Gehrels Neil
Leventhal Marvin
Teegarden Bonnard J.
Tueller Jack
No associations
LandOfFree
Resolution of the 1,238-keV gamma-ray line from supernova 1987A 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 Resolution of the 1,238-keV gamma-ray line from supernova 1987A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resolution of the 1,238-keV gamma-ray line from supernova 1987A will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1874943