出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present the results of the analysis of two Chandra observations of Circinus X-1 performed in
2007, for a total exposure time of ∼50 ks. The source was observed with the High Resolution
Camera during a long X-ray low-flux state of the source. Cir X-1 is an accreting neutron-star
binary system that exhibits ultra-relativistic arcsec-scale radio jets and an extended arcmin-scale
radio nebula. Furthermore, a recent paper has shown an X-ray excess on arcmin-scale prominent
on the side of the receding radio jet. In our images we clearly detect X-ray structures both on the
side of the receding and the approaching radio jet. The X-ray emission is consistent with being
from synchrotron origin. Our detection is consistent with neutron-star binaries being as efficient
as black-hole binaries in producing X-ray outflows, despite their shallower gravitational potential
