Fig. 2: Spectrum of type II supernova SN1987A in Large Magellanic Cloud, observed 27 years ago using X-Ray devices aboard of MIR space station (Sunyaev et al., 1987). A detailed analysis of the observed spectrum proved that the scientists were dealing with gamma-rays of radioactive cobalt decay down-scattered in the optically thick envelope to the 20-200 keV spectral band due to multiple Compton scatterings and recoil effect.
Fig. 3: Spectrum of type Ia SN2014J obtained by INTEGRAL, 50 to 100 days after the explosion (Churazov et al., 2014). Red and blue points show data from the two instruments SPI and ISGRI/IBIS respectively. The black curve shows a fiducial model of the supernova spectrum for day 75 after the explosion. The top row shows images obtained in three high-energy spectral bands by INTEGRAL. A gamma-ray source is clearly visible in all images at the (optical) position of SN2014J.
Dr. Eugene Churazov
Max-Planck-Institut für Astrophysik, Garching
Telefon: +49 98 30000-2219
R. Sunyaev, A. Kaniovsky, V. Efremov, M. Gilfanov, E. Churazov, S. Grebenev, A. Kuznetsov, A. Melioranskiy, N. Yamburenko, S. Yunin, D. Stepanov, I. Chulkov, N. Pappe, M. Boyarskiy, E. Gavrilova, V. Loznikov, A. Prudkoglyad, V. Rodin, C. Reppin, W. Pietsch, J. Engelhauser, J. Trümper, W. Voges, E. Kendziorra, M. Bezler, R. Staubert, A. C. Brinkman, J. Heise, W. A. Mels, R. Jager, G. K. Skinner, O. Al-Emam, T. G. Patterson & A. P. Willmore.Discovery of hard X-ray emission from supernova 1987A, Nature 330, 227 - 229 (19 November 1987)