PLANETARY-NEBULAE IN THE NRAO VLA SKY SURVEY

The 1.4 GHz NRAO VLA Sky Survey (NVSS) images and source catalog were used to detect radio emission from the 885 planetary nebulae north of J2000 declination delta = -40 degrees in the Strasbourg-ESO Catalogue of Galactic Planetary Nebulae. We identified 680 radio sources brighte r than about S = 2.5 mJy beam(-1) (equivalent to T approximate to 0.8 K in the 45 '' FWHM NVSS beam) with planetary nebulae by coincidence w ith accurate optical positions measured from Digitized Sky Survey (DSS ) images. Total extinction coefficients c at lambda = 4861 Angstrom we re calculated for the 429 planetary nebulae with available HP fluxes a nd low free-free optical depths at 1.4 GHz. The variation of c with Ga lactic latitude and longitude is consistent with the extinction being primarily interstellar and not intrinsic.