Sco X-1 is the brightest X-ray source in the sky. Located 2.8 kpc away, it is a well-established persistent Z-source, and one of the few neutron star binaries where extended radio jets have been resolved at milliarcseconds scales. We propose to observe Sco X-1 with INTEGRAL for 215 ks and with XMM-Newton for 80ks, to obtain a (quasi-)continuous broad-band coverage of the target, fully overlapping with a 72-hr continuous Global VLBI radio monitoring observation. We aim to unveil the link between specific accretion events (state transitions and/or quasi-periodic oscillations) and the launch of transient outflows, and providing new insights into ultra-relativistic outflows from neutron stars and the conditions underlying their production.
Publications
A search for period changes of eight short-period Type II Cepheids - Yacob, Alemiye M., Berdnikov, Leonid N.,Pastukhova, Elena N.,Kniazev, Alexei Y.,Whitelock, Patricia A. (2022-10-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.516.2095Y
Diffuse Galactic emission spectrum between 0.5 and 8.0 MeV - Siegert, Thomas, Berteaud, Joanna,Calore, Francesca,Serpico, Pasquale D.,Weinberger, Christoph (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022A&A...660A.130S
Searching for redshifted 2.2 MeV neutron-capture lines from accreting neutron stars: Theoretical X-ray luminosity requirements and INTEGRAL/SPI observations - Ducci, L., Santangelo, A.,Tsygankov, S.,Mushtukov, A.,Ferrigno, C. (2024-10-01) http://ui.adsabs.harvard.edu/#abs/2024A&A...690A.309D
The INTEGRAL (International Gamma-Ray Astrophysics Laboratory) mission, launched by the European Space Agency (ESA) on October 17, 2002, was designed to study high-energy phenomena in the universe. INTEGRAL was operating until february 2025 and it was equipped with three high-energy instruments: the Imager on Board the INTEGRAL Satellite (IBIS), the Spectrometer on INTEGRAL (SPI), and the JEM-X (Joint European Monitor for X-rays). Its Optical Monitoring Camera (OMC) provided optical V-band magnitude measurements, complementing the high-energy observations.
European Space Agency, Motta, 2025, 'Probing the disc-jet coupling in the neutron star low-mass X-ray binary Sco X-1', 1.0, European Space Agency, https://doi.org/10.57780/esa-bxt1gy2
