An analysis of IRAS data for a sample of classical (optically selected) Seyfert galaxies is presented. The IRAS fluxes at 25, 60, and 100 μm are found to be uncorrelated or only very weakly correlated with the ultraviolet-optical continuum flux and the fluxes at 3.5 and 10 μm. This provides further evidence that the active nucleus is not the

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IAUC 4306 available at Central Bureau for Astronomical Telegrams.

Improved non-LTE line formation calculations for hydrogen in O-stars are presented. The calculations are carried out by means of the method recently developed by Werner and Husfeld (1985) and use an extensive hydrogen model atom with 10 non-LTE levels and 55 transitions. For most of the transitions Stark-broadening is included in the statistical

Ground-based multichannel photometry of integral sunlight has been obtained at Izaña (Tenerife) during three months in 1984 with a photometer built at ESTEC. Power spectra of solar irradiance variations of individual days show power in the 5 min band just above noise at a level comparable to the one found from the SMM data (Woodard and Hudson, 1983