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Pulse Shape and Spectral Variablity of OAO 1657-415 (1997)

Finger, Mark H. ; Wilson, Robert B.

In: Other Sources

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Publication Date: 2019-07-17

Description: Inspection of pulse shapes obtained by the Burst and Transient Source Experiment (BATSE) Pulsar Monitor for the high mass X-ray binary pulsar OAO 1657-415 shows that significant variations have occurred. For example, power in the second harmonic of the pulse increased by 50 percent during TJD 10358 - 10374, at the beginning of a slow transition from spinup to spindown.This source is shown to exhibit alternating intervals of spinup and spindown of similar magnitudes. A study will be presented of pulse shape, intensity and spectral variability of the source, with a search for any correlation with spin behavior.

Keywords: Astronomy

Type: Nov 03, 1997 - Nov 07, 1997; Estes Park, CO; United States

Format: text

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