``QPO-FOLDED'' Spectroscopic Study of 3 Low-Mass X-Ray Binaries and Dipping Sources

Details ``QPO-FOLDED'' Spectroscopic Study of 3 Low-Mass X-Ray Binaries and Dipping Sources ``QPO-FOLDED'' Spectroscopic Study of 3 Low-Mass X-Ray Binaries and Dipping Sources

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..828m&link_type=abstract

Chandra Proposal ID #03400483

Physics

Chandra Proposal Id #03400483

Scientific paper

We will use Chandra's ACIS-S detector in combination with HETG and LETG to do phase-resolved spectroscopy of the three low-mass X-ray binaries and dippers 4U 1746-37, 4U 1323-62, and EXO 0748-676. Using the 1 Hz QPO that we recently discovered in these sources we will construct ``QPO-folded'' light curves to study separately spectra from different QPO-phase intervals. We will correlate the presence/absence of emission and absorption features in the energy spectrum of Chandra (and XMM-Newton) with timing properties measured both by Chandra, and simultaneous RXTE observations. This should help us determine how timing properties depend on mass accretion rate, and whether mass flows onto the central object through different channels of accretion.

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