Hard X-ray emission from the recurrent transient A0535+26 during its 1980 high-intensity outburst |
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| Authors: | F Frontera D Dal Fiume W Dusi E Morelli G Spada G Ventura |
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| Abstract: | The transient X-ray pulsar A0535+26 was observed on October 4, 1980 during a high level intensity outburst with a balloon borne hard X-ray detector. High statistical quality source spectra were determined up to 100 keV. Both blackbody and Wien laws fit well the data. Pulse phase spectroscopy shows variation of temperature index between 7.5 and 8.5 keV in the off source spectra and between 7.4 and 10.5 keV in the off pulse spectra. The time averaged luminosity above 30 keV is 8×1036 erg/s. |
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| Keywords: | X-rays: binaries Neutron stars X-rays: sources X-rays: pulsars Transient X-ray sources |
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