HETGS Observation of a Transient Hard X-ray Symbiotic Binary

Details HETGS Observation of a Transient Hard X-ray Symbiotic Binary HETGS Observation of a Transient Hard X-ray Symbiotic Binary

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.2068s&link_type=abstract

Chandra Proposal ID #06308230, p.1

Computer Science

Chandra Proposal Id #06308230

Scientific paper

RT Cru is one of a subset of particularly active symbiotic stars (SS; white dwarfs accreting from the wind of red giants) characterized by rapid optical flickering, and in some cases jets and recurrent nova explosions. The recent detection of RT Cru with INTEGRAL (ATels 519, 528, and 591) indicates that during outburst, it also produces the hardest X-ray emission of any known SS. In August, RT Cru was observed with the Swift XRT for 4.7 ks. The XRT observation revealed several emission-line complexes, a possible broad soft component, and hints of continuum emission. The line blends could be due to Si, Ca, and Ar. But Ca and Ar are not strong in nova spectra, and large blue- or red-shifts are not expected in RT Cru. We request a 50-ks HETGS observation to resolve and identify the emission lines and any absorption features, and to isolate the continuum. We will also search for extended jet structure in the 0th-order spot. This observation should produce ~2000 counts in the MEG.

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