Photoionized X-Ray Emission in CYG X-2

Details Photoionized X-Ray Emission in CYG X-2 Photoionized X-Ray Emission in CYG X-2

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..456c&link_type=abstract

Chandra Proposal ID #02400041

Physics

Chandra Proposal Id #02400041

Scientific paper

This highly luminous X-ray binary was observed with the Chandra HETGS during the verification and checkout. The source showed an X-ray flux of nearly 0.5 Crab causing severe depletion of photons in the MEG and HEG 1st order spectra due to pile up effects. Nevertheless the spectrum showed various remarkable features at high energies and in the higher orders, which can be identified as photoionized emission from Mg-, Si-, S-, Ca-, and Fe. However the detections remained spurious and at higher wavelengths very much affected by pile up. We want to re-observe Cyg X-2 for 15 ks, in order to obtain pile up free 1st order spectra, enhance and confirm the findings in the higher order spectra as well as study variability in the line emission.

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