Radio Emission from Symbiotic Variables: CI Cygni, Z Andromedae, and EG Andromedae---Temporal Variability as Clues to the Nature of Symbiotics

A continuing survey of interacting binary systems has yielded first detections of the symbiotic variables CI Cyg and EG And and reproduced previous flux measurements for Z And. The CI Cyg observation implies considerable radio variability for some symbiotics, while the radio flux from Z And indicates this object has been reasonably stable in the radio for years. Rapid radio variability may indicate the presence of mass transfer through an accretion disk.