Observation of an outburst from the X-ray pulsator 0115+63 |
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| Authors: | M J Ricketts R Hall C G Page K A Pounds |
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| Institution: | (1) X-ray Astronomy Group, University of Leicester, Leicester, England |
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| Abstract: | The Ariel 6 X-ray instruments observed 0115+63 during 1980 December 16–30, when the mean flux was  150 millicrab. Analysis of the 3.6s pulsations given a refined orbital period of 24.3155 ± 0.0002 days and a periastron angle of 47°. 15 ± 0°.13, setting a limit on the rate of advance of periastron since 1978 of 0.11 yr–1. During the observation the pulse period was decreasing faster than during the 1978 outburst, but in the 3 year interval there had been a spin down. |
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