Hetgs Study of Persistent and Burst Emission from Two Luminous Bursters

Physics

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Chandra Proposal Id #01400713

Scientific paper

Serpens X-1 and 4U 1735-44 are two bursting low-mass X-ray binaries which have shown confirmed Fe K line emission and less certain evidence of low energy line emission. Reported variations in Fe K line, energy, and width suggest that the inner disk region is sometimes the dominant formation region for these relatively luminous persistent sources at low inclination. Quasiperiodic oscillations at high frequencies also arise in the inner disk region and simultaneous RXTE data would correlate temporal behavior, the continuum and lines. For each source we propose an 80 ksec HETG/ACIS observation likely to include at least a few bursts. Simultaneous HETG and RXTE burst spectra would test predicted divergence from black body models and better constrain neutron star parameters.

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