Doppler-Shifted Emission Lines from the Jets of 1E1740.7-2942?

Details Doppler-Shifted Emission Lines from the Jets of 1E1740.7-2942? Doppler-Shifted Emission Lines from the Jets of 1E1740.7-2942?

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..577c&link_type=abstract

Chandra Proposal ID #02400252

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Chandra Proposal Id #02400252

Scientific paper

During Cycle 1 we observed 1E1740.7-2942 with the HETGS for 10 ks (but with an effective exposure only 7 ks). The dispersed grating spectrum shows marginal detection of weak, narrow emission lines. Nearly all of the lines could be identified with highly ionized species such as H-like and He-like Fe, Ca, S, and Ar, if some of the line pairs (which are otherwise difficult to interpret) are attributed to the Doppler red- and blue-shifted lines from the jets which are known to be always present in the system. To verify this exciting scenario, we propose to observe the source again for 70 ks with a more appropriate set of data modes. The observation would increase the significance of any physical lines from about 2 sigma to 5 sigma, which would place the interpretation on a much firmer ground.

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