Time-Resolved UV and X-Ray Spectrometry of X-Ray Binaries Cycle 4 Medium

Details Time-Resolved UV and X-Ray Spectrometry of X-Ray Binaries Cycle 4 Medium Time-Resolved UV and X-Ray Spectrometry of X-Ray Binaries Cycle 4 Medium

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5478m&link_type=abstract

HST Proposal ID #5478

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Hst Proposal Id #5478 Hot Stars X-Ray Binaries

Scientific paper

In simultaneous observations with HST and ASCA, we will observe rapid variations in the UV and X-ray spectra of the X-ray binary Her X-1. Our purpose is to understand the accretion flow and X-ray emission. By observing UV echoes of X-ray variations (especially pulsations) on time scales down to 0.35 s, we can map the precessing accretion disk. We will use the HRS (30km/s resolution) to look for pulsations in the profile of the NV emission line at 1240 A. During these observations, we will use ASCA to find the X-ray pulse shape and spectrum, X-ray/UV phase lag, X-ray state, absorbing column, and X-ray emission lines and edges. The X-ray and UV observations will complement each other, resulting in greatly enhanced science. These observations will take place from orbital phases 0.7 to 1.0, in order to probe the geometry of the X-ray absorbing and UV fluorescing gas.

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