2 Observations

Radio continuum observations for 64 new PNe which had been confirmed spectroscopically at the ESO 1.52-m and CTIO 4-m telescopes were obtained with the Australia Telescope Compact Array. The array was in configuration $\char93$ 6A. The shortest baseline was 337 m and the longest 5939 m. The bandwidth was 128 MHz centered at 4800 MHz and 8640 MHz, corresponding to 6 and 3 cm respectively. The synthesized beam for the 6 km array at 6 cm is $\sim$2 $^{\prime\prime}$ and $\sim$1 $^{\prime\prime}$ at 3 cm. According to the ACA manual, the largest well imaged structure in a 60 min observation is 30 $^{\prime\prime}$ at 6 cm and 15 $^{\prime\prime}$ at 3 cm. Consequently we expected all our sources to be well imaged at 6 cm and virtually all at 3 cm. Forty PNe were observed at 3 and 6 cm simultaneously for 12 h on each of 12, 13, 16 and 17 February 1997 and 36 PNe were observed during 10 h on each of 24, 25, and 26 May 1999. In 1997 each subsample contained 10 PNe and each PN was observed for 5 min every hour. In 1999 each subsample contained 6 PNe and each PN was observed for 8 min every hour. The total quality integration time per PN was at least 50 min in 1997 and 80 min in 1999. To avoid artifacts at the center of the field we offsetted the positions 30 $^{\prime\prime}$ in declination. At the beginning and the end of each 12 h shift the primary flux density calibrator 1934-638 was observed for 5 to 10 min. The phase calibrator VLA 1730-130 and VLA 1748-253 were observed about every 20 min for 2 min.