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Herculis X1: Results and Interpretation

Published online by Cambridge University Press:  04 August 2017

Ph. Durouchoux
Ph. Durouchoux*
Affiliation:
Service d'Astrophysique, DPhG/Ap, CEN Saclay 91191 Gif/s/Yvette, FRANCE

Extract

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The hard X-ray spectrum of Her X1 was measured for the first time with a high-resolution (1.4 keV FWHM) germanium spectrometer (LEGS: GSFC/Saclay collaboration). The observation was performed near the peak of the 0B state in the 35 day cycle and 1.24 s pulsations were observed between the energies of 20 keV and 70 keV. The best fit energies are 35 keV for an absorption line and 39 keV for an emission line. These are significantly lower energies than those derived from previous experiments.

Type
II. Accretion Powered Pulsars
Information
Symposium - International Astronomical Union , Volume 125: The Origin and Evolution of Neutron Stars , 1987 , pp. 201
Copyright
Copyright © Reidel 1987