X-ray flux related timing and spectral features of 2S 1417–62

Abstract:

Rossi X-ray Timing Explorer (RXTE) observations of the X-ray transient pulsar 2S 1417 − 62 between 1999 November and 2000 August with a total exposure of ∼394 ks have been analysed. Observations include a main outburst followed by a series of mini outbursts. Changes in pulse morphology and pulse fraction were found to be related to the changes in X-ray flux. Particularly low X-ray flux regions were found to have significantly lower pulse fractions with different pulse morphologies. The 3–60 keV Proportional Counter Array (PCA) High-Energy X-ray Timing Experiment (HEXTE) main outburst spectrum was modelled with an absorbed power-law model with high-energy cut-off and a Gaussian iron line complex feature. Using the same spectral model, individual 3–20 keV PCA spectra were found to be softer and less absorbed in low X-ray flux regions between outbursts. Spectral studies showed that …

Año de publicación:

2004

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Fuente:

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