@article {22767,
	title = {Supernova 1987A : envelope metallicity and the nature of the soft X-ray component.},
	volume = {208},
	year = {1989},
	month = {1989/01/1},
	pages = {L11 - L14},
	abstract = {The observed X-ray spectra reported by the GINGA and MIR-HEXE satellite experiments contain information on the metallicity of the Supernova{\textquoteright}s expanding envelope. Using a Monte Carlo code to simulate the Compton degradation of the ^56^Co -produced γ-rays, we calculate the emerging X-ray spectrum for various metallicities. The observed spectra are compatible with a low (less than solar) metal abundance, while an additional soft component, independent of the ^56^Co source is probably required in order to account for the data. The evolution of the spectral hardness is used as a sensitive indicator of the nature of the soft component, and of the possible contribution of an imbedded pulsar to the X-ray spectrum.},
	keywords = {Astrophysics, Cobalt Isotopes, Metallicity, Monte Carlo method, Neutron stars, Stellar Envelopes, Supernova 1987a, X Ray Sources, X Ray Spectra},
	isbn = {0004-6361},
	url = {https://ui.adsabs.harvard.edu/abs/1989A\&A...208L..11M},
	author = {Mastichiadis, A. and Kylafis, N. and Ventura, J.}
}
