Near the beginning of the observations, the NASA
RXTE satellite observed a strong X-ray flare near the neutron star and this has produced
the increasing strength of the radio core. We also think that this X-ray flare was so
intense that it violently distorted the disk around the neutron star and destroyed the
beam which transports the electrons out to the lobes. It will take about three hours for
this energy flow to reach the advancing lobe. The flow to the receding
lobe disappears later, but this is only because it is behind Sco X-1 and it takes longer
for its radio emission to reach us. The advancing lobe will soon disappear. |