Circinus X-1 at 408 MHz.

Calibrated observations of the radio source associated with Cir X-1 are reviewed which were obtained by drift scans at a frequency of 408 MHz. The observations are calibrated in both position and flux density relative to the reference source 1505-56.9. It is found that there may have been real changes in the position of the radio source associated with Cir X-1 and that a long-term change in flux density may have occurred. It is concluded that the 408-MHz source associated with Cir X-1 consists of a steady extended component oriented 8 + or 3 deg along a southeasterly direction and located perhaps up to 30 arcsec southeast of the optical source plus a smaller variable component more closely associated with the optical position.