Gamma-ray line emission from SN1987A

  title={Gamma-ray line emission from SN1987A},
  author={Steven M. Matz and Gerald Harvey Share and Mark D. Leising and Edward L. Chupp and W.T. Vestrandt and William R. Purcell and Mark S. Strickman and Claus Reppin},
The gamma-ray spectrometer (GRS) on NASA's Solar Maximum Mission satellite (SMM) has observed a significant (>5δ) net line flux at ˜847 keV in the background-subtracted spectrum of SN1987A—accumulated between 1 August and 31 October 1987. This is the energy of the strong gamma-ray line from decay of 56Co, which was predicted1,3 to be seen from supernovae. The inferred average line flux during this period is ˜(1.0±0.25) x 10−3 photons cm−2 s−1 at an energy of 843 ± 5 keV. This feature cannot be… 

Resolution of the 1,238-keV γ-ray line from supernova 1987A

WE report observations of supernova 1987A from the maiden flight of the Gamma-Ray Imaging Spectrometer (GRIS). SN1987A was observed for a period of 11.1 hours on 1 May 1988. Line emission at 1,238

Gamma-Ray Lines from SN1987A and Interpretation

Gamma-ray lines from the decay of 56Co in the SN1987A remnant have been detected by satellite and balloon experiments. The observations directly confirm the basic theoretical tenet that 56Ni was

On the variability of the X-ray emission from supernova 1987A

The hard-X-ray emission observed above 10 keV from SN1987A by the X-ray astronomy satellite Ginga1 and by the KVANT module2 on the MIR station is reasonably well explained3,4 by Compton

SPI observations of the diffuse ^60Fe emission in the Galaxy

Gamma-ray line emission from radioactive decay of 60Fe provides constraints on nucleosynthesis in massive stars and supernovae. The spectrometer SPI on board INTEGRAL has accumulated nearly three

Gamma-ray line measurements from supernova explosions

  • R. Diehl
  • Physics
    Proceedings of the International Astronomical Union
  • 2017
Abstract Gamma ray lines are expected to be emitted as part of the afterglow of supernova explosions, because radioactive decay of freshly synthesised nuclei occurs. Significant radioactive gamma ray

High Resolution Observations of Gamma-Ray Line Profiles from SN 1987A

Supernova 1987A was a unique opportunity for gamma-ray astronomers to observe freshly synthesized radioactive material from a type II supernova. Gamma-ray lines were first detected by the

Pre-Discovery Hard X- and Gamma-Ray Luminosity of SN 1987A from Optical Spectra

Modelling of the emergent hard X- and gamma-ray emission in SN1987a is an important diagnostic tool for 56Co distribution in the envelope as well as for the envelope structure (SUNYAEV et al. [1];



Discovery of hard X-ray emission from supernova 1987A

We report the discovery of hard X-rays from the region of the supernova SN1987A in the Large Magellanic Cloud. The observations were made from the Mir-Kvant observatory 'Röntgen'. Hard X-rays were

The gamma ray spectrometer for the Solar Maximum Mission

The Solar Maximum Mission Gamma Ray Experiment (SMM GRE) utilizes an actively shielded, multicrystal scintillation spectrometer to measure the flux of solar gamma rays. The instrument provides a

Discovery of an unusual hard X-ray source in the region of supernova 1987A

We have discovered a new hard X-ray source near supernova 1987 A, in the Large Magellanic Cloud, from the X-ray astronomy satellite Ginga. The present error box of 0.2° × 0.3° includes the supernova.