Re-analysis of Timing Parameters of OAO 1657-415
A. Baykal (1), S.C. Inam (2), B. Icdem (1), E. Beklen (3) ((1) METU,, (2) Baskent University, (3) Suleyman Demirel University)
TL;DR
This study re-analyzed RXTE-PCA observations of OAO 1657-415, providing a refined timing solution and confirming a marginal correlation between spin-up episodes and X-ray luminosity changes.
Contribution
It offers an improved timing solution for OAO 1657-415 and verifies a previously suggested correlation between spin behavior and luminosity.
Findings
Revised timing solution fits data better.
Confirmed marginal correlation between spin-up and luminosity.
Updated pulse frequency values.
Abstract
In this paper, we present the re-analysis of a set of RXTE-PCA observations of OAO 1657-415 during 1997 August 20-27. We found a revised timing solution which was found to fit better to the data and updated pulse frequency values accordingly. We also verified that there is a marginal correlation between the gradual spin-up (or decrease in spin-down rate) and increase in X-ray luminosity as suggested by Baykal (2000).
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Taxonomy
TopicsAtmospheric Ozone and Climate · Solar and Space Plasma Dynamics · Calibration and Measurement Techniques