Landing page for project EM171

Sco X-1 is the brightest X-ray source in the sky. Located 2.8 kpc away, Sco X-1 is one of the few neutron star binaries where extended radio jets have been resolved at mas scales, and the first accreting neutron star system that showed jets with ultra-relativistic speed and with changing orientation angle. We propose to observe Sco X-1 during three out-of-session epochs at C-band, for a total of 36 hr (12 hr per epoch, including overheads), strictly simultaneously with the Imaging X-ray Polarimetry Explorer (IXPE) satellite, in order to determine the orientation angle of the jets inferred from VLBI images, and the polarisation angle measured in the X-rays. These observations will allow us to connect the properties of the jets with those of the accretion flow, and to reveal the structure and geometry of the corona, responsible for the polarisation in the X-ray emission.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia. The EVN archive itself has the DOI https://handle.test.datacite.org/10.17616/R3Z197