Search for X-ray emission from the radio lobes of Scorpius X-1

Astronomy and Astrophysics – Astronomy

Scientific paper

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Radio Jets (Astronomy), Radio Sources (Astronomy), X Ray Sources, X Ray Spectra, Quasars, Scorpius Constellation, Stellar Models, X Ray Binaries

Scientific paper

Images obtained with the low-energy imaging telescope on board the European X-Ray Astronomy Satellite have been searched for X-ray emission from the radio lobes of Sco X-1. After the scattered photons from the image of the central X-ray source in Sco X-1 are taken into account, no significant additional X-ray flux from the radio lobes can be detected above the background. The 3 sigma upper limit is less than 0.7 micro-Jy for the northeast radio lobe and less than 1.0 micro-J for the southwest radio lobe. This eliminates the embedded source model of Kundt and Gopal-Krishna as a viable model of the radio emission. These limits are three orders of magnitude too high to constrain models of synchrotron or inverse Compton X-ray emission.

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