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Antonella Fruscione, Jeremy J. Drake, Kelley McDonald, and Roger F. Malina
Center for EUV Astrophysics, 2150 Kittredge Street, University
of California, Berkeley, CA 94720
We present the results of a complete survey, at extreme ultraviolet (EUV) wavelengths (58-234 A), of the high galactic latitude (|b| >= 20 deg) planetary nebulae (PN) with at least one determination of the distance within 1 kpc of the Sun. The sample comprises 27 objects observed during the Extreme Ultraviolet Explorer (EUVE) all-sky survey and represents the majority of PN likely to be accessible at EUV wavelengths. Six PN (NGC 246, NGC 1360, K 1-16, LoTr 5, NGC 4361, and NGC 3587) were detected in the shortest EUV band (58-174 A). A seventh PN (NGC 6853), not included in the sample, was also detected during the survey. The emission is consistent in all cases with that of a point source, and therefore is most probably originating from the PN central star. Accurate EUV count rates or upper limits in the two shorter EUVE bands (centered at ~100 and 200 A) are given for all the sources in the sample. NGC 4361 and NGC 3587 are reported here for the first time as sources of EUV radiation. As might be expected, attenuation by the interstellar medium dominates the PN distribution in the EUV sky.
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