The results of a HST /WFPC2 snapshot imaging survey of selected symbiotic stars in 1999/2000 are presented .
Seven sources – HD 149427 ( PC 11 ) , PU Vul , RT Ser , He2 - 104 ( Southern Crab ) , V1329 Cyg ( HBV 475 ) , V417 Cen , AS 201 – were observed in filters F218W ( ultraviolet continuum ) , F502N ( [ Oiii ] \lambda \lambda 4959 , 5007 ) and F656N ( H \alpha \lambda 6563 ) ; an eighth source , RS Oph , was observed in F437N ( [ Oiii ] \lambda 4363 ) , F502N and F656N .
The presence of extended emission was detected in He2 - 104 , V1329 Cyg and possibly HD 149427 .
In He2 - 104 we detected the [ Oiii ] and H \alpha counterparts to the inner lobes found in [ Nii ] by Corradi et al .
For V1329 Cyg , comparison with previously published HST /FOC results indicates expanding ejecta which may be associated with an ejection event in 1982 ( \pm 2 years ) at a velocity of 260 \pm 50 km s ^ { -1 } in the plane of the sky and at an assumed distance of 3.4kpc .
We also present previously unpublished radio images of HD 149427 , which we have obtained from the archives of the Australia Telescope Compact Array and which reveal the presence of extended emission at a similar orientation to that of the possible optical extension .
Finally we also include HST /WFPC2 GO observations of AG Peg and detect possible extended emission in the F218W filter .