Narrow-band imaging and a search for planetary nebulae^*

Institut für Astronomie und Astrophysik der Universität, D-72076 Tübingen, Germany

Send offprint request to: T. Rauch

Received: 2 October 1998
Accepted: 12 November 1998

Abstract

We summarize the results of narrow-band (Hα and [O III] λ 5007 Å) imaging of eight planetary nebulae taken during recent observing campaigns: We present the probably largest known PN, MWP 1, with a linear diameter of about 6 pc. We show first narrow-band images of He 2-437, MeWe 1-5, MeWe 1-8, MeWe 1-9, NGC 1360, and of – like we term them – the "Galactic footballs” A 43 and NGC 7094. We report about a search for planetary nebulae around eleven extremely hot (pre-) white dwarfs which had not been successful.