Search for fast correlated X-ray and optical variability in Cir X-1 and XTE J1746-321

H. C. Spruit, H. Steinle, G. Kanbach

Coordinated observations X-ray+optical observations of two southern X-ray binaries, the black hole candidate XTE J1746-321 and the neutron star accreter Cir X-1 (a `microquasar') a…