Radio Observations of Seven Suggested Supernova Remnants

In a recent paper Aizu and Tabara list 36 radio sources classified as supernova remnants (SNR). Some of these identifications are based on low-resolution radio data and are consequently unreliable. Using the Parkes 210-foot radio telescope at 635, 1410 and 2650 MHz (beamwidth 31‧, 15‧ and 8‧.4 respectively), E. R. Hill and the author observed the seven sources listed in Table I. Of these seven, there is close agreement with Aizu and Tabara’s data only in the last one (3C396.1), and we agree with the SNR classification, with certain reservations, for only three of these sources.