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Farewell to the IUE.

Stickland, D.

At the end of September 1996, a most successful astronomical satellite, the International Ultraviolet Explorer, was switched off.

High-latitude and polar heliosphere

Veselovsky, I. S.

A short review of the recent studies of the three-dimensional structure of the heliosphere is presented. The main progress is due to direct plasma and magnetic field measurements from the Ulysses spacecraft outside the ecliptic plane in heliolatitudes of up to ±80°. The new data are used for the development of theoretical models.

Transport of energetic particles derived from a detailed analysis of the September 29, 1989 solar flare

Vainio, R.; Torsti, J.; Anttila, A. +1 more

The exceptionally energetic flare of September 29, 1989, at 11:33 UT has been analyzed using neutron monitor data and the energy resolved particle data collected by the GOES satellites. A picture emerges of a dual injection in the impulsive, explosive phase of the flare process, with an additional gradual source mechanism traced to the shock front…

Evidence of Accretion Disks Around Herbig Ae/Fe Stars from IUE Observations

Tjin A Djie, H. R. E.; Blondel, P. F. C.

The Discovery of a Small Group of Galaxies in Ursa Major by the Hubble Space Telescope

Malumuth, Eliot M.; Sandoval, Jennifer L.

We present HST/WFPC2 images of a previously unknown loose group of galaxies in Ursa Major. These images were obtained as part of the GTO parallel program in which WFPC2 images are taken using the F606W (wide V) and F814W (I band) filters in parallel with GTO observations using other HST instruments. These WFPC2 images, obtained in parallel with FG…

Low-energy interplanetary charged particles: solar south pole to solar north pole and high heliolatitudes.

Pick, M.; Anderson, K. A.; Krimigis, S. M. +9 more

Low-energy (⪆50 keV) charged particles measured by the HI-SCALE instrument on the Ulysses spacecraft provided unique information on the particle composition and intensity in both polar regions of the Sun. Further, the rapid 160° south-to-north solar transit of Ulysses in early 1995 yielded new information on heliospheric structure. This paper revi…

Hubble space telescope observations of AGN`s in the ultraviolet: BL LAC and Q2345+007

Boyd, Patricia T.; Nelson, M. J.; Percival, J. W. +3 more

We report the first polarimetric observations in the ultraviolet of two AGN's, the blazar BL Lac and the gravitational lens candidate Q2345+007. We find strong (p>3%) and variable UV polarization in BL Lac, two of the characteristics exhibited by blazars in the visible. The polarization of BL Lac in the UV decreased significantly (from 18% to &…