Is 4U 0114+65 an eclipsing HMXB?
作者： Pragati Pradhan , Biswajit Paul , B. C. Paul , Enrico Bozzo , Tomaso M. Belloni
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摘要: We present the pulsation and spectral characteristics of HMXB 4U 0114+65 during a \emph{Suzaku} observation covering part orbit that included previously known low intensity emission source (dip) egress from this state. This dip has been interpreted in previous works as an X-ray eclipse. Notably, Suzaku observation, count rate outside vary by factor only 2-4 at odds with eclipses other HMXBs, where drops upto two orders magnitude. The orbital profile is characterized narrow RXTE-ASM (2-12 \rm{keV}) light curve shallower one Swift-BAT (15-50 \rm{keV}), which different eclipse ingress/egress behaviour HMXBs. time-resolved analysis reveal moderate absorption column density (N$_{H}$ - 2-20 $\times$ $10^{22}$ atoms $cm^{-2}$) relatively equivalent width ($\sim$ 30 \rm{eV} \& 12 iron K$_\alpha$ K$_\beta$ lines respectively) opposed to typical spectra HMXBs $\sim$ 1 \rm{keV}. Both XIS PIN data show clear pulsations dip, we have further confirmed using entire archival IBIS/ISGRI JEM-X instruments onboard \emph{INTEGRAL}. results presented question interpretation thus discuss alternative interpretations periodic 0114+65.
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