The paper presents the first results from long-slit spectra of the Seyfert galaxy NGC 4151 which give average diagnostic ratios of weak lines in the Extended Narrow Line Region (ENLR) of the galaxy and the first direct density measurement in an ENLR. These data confirm that the ENLR is kinematically undisturbed gas in the disk of the galaxy which

New narrow band images of NGC 4151, taken in excellent seeing conditions with the 4.2-m William Herschel Telescope on La Palma are presented. These reveal a wealth of detail that can be used to test models for the anisotropy of the narrow-line region.

SN 1988A is (with exception of the well-observed SN 1987A) the only type II SN for which observations of the late tail of the light curve are presently available. This SN showed a brief spike in the early visual light curve followed by a long plateau lasting for about 3 months. Spectra taken during both the plateau and the postplateau phases

Intermediate-long-slit spectroscopy of the protoplanetary-nebula candidate CRL 618, obtained using an IPCS on the 2.5-m telescope at the Observatorio Roque de los Muchachos, are reported. The data are presented in plots of forbidden N II (6548 + 6584 A) vs H-alpha and compared with the predictions of theoretical models. Best agreement is found with

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The effects of atmospheric turbulence on astronomical observations from the Observatorio del Teide (Tenerife) and the Observatorio Roque de los Muchachos (La Palma) in the Canary Islands are characterized, summarizing the results of recent measurement campaigns. Data on image quality, atmospheric transmission, and IR conditions are presented in