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- W2600252876 abstract "We present results obtained from a Suzaku observation of the accretion powered X-ray pulsar GX 1+4. Broad-band continuum spectrum of the pulsar was found to be better described by a simple model consisting of a blackbody component and an exponential cutoff power-law than the previously used compTT continuum model. Though the pulse profile had a sharp dip in soft X-rays ($<$10 keV), phase-resolved spectroscopy confirmed that the dimming was not due to increase in photoelectric absorption. Phase-sliced spectral analysis showed the presence of a significant spectral modulation beyond 10 keV except for the dip phase. A search for the presence of cyclotron resonance scattering feature in the Suzaku spectra yielded a negative result. Iron K-shell (K$_alpha$ and K$_beta$) emission lines from nearly neutral iron ions ($<$Fe III) were clearly detected in the source spectrum. A significant K$_alpha$ emission line from almost neutral Ni atoms was detected for the first time in this source. We estimated the iron abundance of $sim$80 % of the solar value and Ni/Fe abundance ratio of about two times of the solar value. We searched for a iron Ly$_alpha$ emission line and found a significant improvement in the spectral fitting by inclusion of this line." @default.
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- W2600252876 date "2017-03-21" @default.
- W2600252876 modified "2023-09-26" @default.
- W2600252876 title "ASuzakuView of Accretion-powered X-Ray Pulsar GX 1+4" @default.
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- W2600252876 doi "https://doi.org/10.3847/1538-4357/aa6301" @default.
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