Variations in the spectra and pulse period of GX301-2

Astronomy and Astrophysics – Astronomy

Scientific paper

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Absorption Spectra, Pulse Rate, Radio Sources (Astronomy), Doppler Effect, Oso, X Ray Spectroscopy

Scientific paper

Spectra from observations of GX301-2 (3U1223-62) by the Goddard X-ray spectroscopy experiment on OSO-8 show an absorption edge due to cool iron with column densities of a few x 10 to the 19th power/cm squared. A decrease in intensity was associated with increased absorption and a spectrum similar to those of binary X-ray sources in absorption dips. Observed variations of the pulse period are consistent with Doppler shifts for reasonable orbit parameters.

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