We present narrowband (Hα and adjacent continuum) and broadband (B and V) optical images of the dwarf Wolf-Rayet galaxy Zw 0855+06 and its companion, together with high-resolution Hα spectroscopy of the main galaxy. We find a bridge of ~14.7 kpc (~65") in length and stellar nature connecting both galaxies, a feature that undoubtedly indicates their

We performed an extensive observing programme on the zodiacal light with ISOPHOT. The mapping of several ~0.5degx0.5deg fields demonstrates the sub-percentage smoothness of the zodiacal light brightness on arcminute scale. The analysis of 27 ISOPHOT-S spectra in the 5-12μm range revealed blackbody-like spectral shapes with no obvious spectral

The axisymmetric component of the large-scale solar magnetic fields has a pronounced poleward branch at higher latitudes. In order to clarify the origin of this branch we construct an axisymmetric model of the passive transport of the mean poloidal magnetic field in the convective zone, including meridional circulation, anisotropic diffusivity

The basic capabilities of the Wide Field Imager (WFI) were described in a previous Messenger article (No. 93, p. 13; see also Table 1) which also includes a brief account of the contributions by the three participating institutes, namely ESO (Garching and La Silla), the Max-Planck- Institut für Astronomie in Heidelberg, and the Osservatorio

We present ISOCAM and ISOPHOT observations of the galaxy pair NGC 6090. The SED derived from all ISO measurements is typical for strong starbursts which were triggered by the tidal interaction. With ISOCAM observations we could resolve the two nuclei of NGC 6090 separated by 6'' in the MIR. The NE nucleus is the more active one, both in the optical

The ISOPHOT Interactive Analysis (PIA), originally conceived as a tool for ISOPHOT data processing to be used by calibration experts, rapidly became the software of choice for scientific data reduction of ISOPHOT observations. In this paper we summarize the enhancements of PIA in the last year, and discuss in particular its capabilities for