Southern emission-line flux standards

We present slitless absolute spectrophotometric observations made at high dispersion of southern compact (<5 '' diameter) planetary nebulae (PNs) drawn from the Acker et al. catalog between 7 hr and 17 hr in R.A. A total of 52 nebulae were observed, for which we give accurate positions. For 50 of these we have measured accurate radial velocities. For the 39 objects observed on more than one occasion, we give absolute H alpha, H beta, and [O III] line fluxes and equivalent widths and the absolute fluxes of a number of other emission lines. These data are intended to supply reliable emission-line flux standards for southern hemisphere observers. From our data we have also been able to derive improved values for the air wavelengths of the [N II] and [S II] lines in the red.