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Multiwavelength astronomy using ESIS

Giommi, P.; Ansari, S. G.

We present results on multi-frequency astronomy obtained using the European Space Information System, ESIS. ESIS is an ESA service designed to access, manipulate and combine archival data from a number of remote archives in the fields of Astronomy and Space Physics. The examples presented here include plots of radio-to-X-ray energy distribution of…

Multiwavelength monitoring of active galactic nuclei

Urry, C. M.

Recent multiwavelength monitoring of active galactic nuclei (AGN), particularly with the IUE satellite, has produced extraordinary advances in our understanding of the energy-generation mechanism(s) in the central engine and of the structure of the surrounding material. Examples discussed here include both ordinary AGN and blazars (the collective …

Ulysses Observations of Solar Wind Proton and Alpha Particle Temperatures and Anisotropies from 1 to 5 AU

McComas, D. J.; Goldstein, B. E.; Bame, S. J. +3 more

Low Frequency Waves During the March 1991 Solar Particle Events at the Ulysses Spacecraft

Balogh, A.; Tsurutani, B. T.; Smith, E. J. +1 more

Ion and Electron Anisotropies During the March 23, 15:43 UT Shock Observed at Ulysses

Roelof, E.; Simnett, G.; Armstrong, T. +2 more

Two-component continuum spectrum X-ray pulsar EXO2030+375

Li, T. P.; Cheng, L. X.; Sun, X. J. +1 more

We report the detection of a soft X-ray component in the spectrum of the transient X-ray pulsar EXO2030+375 at a high state in 1985. The spectrum of the soft X-ray component could be fitted by a blackbody with a temperature kT ∼1.1 keV and a radius of the emission areaR ∼ 3.6 - 6.1 km (assuming 5 kpc distance).

The UV and IR Jovian aurorae

Prange, Renee

Although the Jovian aurorae have been widely considered as due to the interaction of the Io torus with the magnetosphere, rather little had been learnt until the last few years from the remote UV observations as far as generation mechanisms are concerned, due both to the complexity of the observation analysis and the deficiency of the theoretical …

Ultra low frequency waves at the magnetic pile-up boundary of comet P/Halley

Glassmeier, K. -H.; Belmont, G.; Rème, H. +2 more

Around the magnetic pile-up boundary observed by Giotto at 135,000 km from the nucleus of comet Halley, plasma and magnetic features display evidence of ultra-low frequency modes. Outside the pile-up region, a large region is characterized by an anti-correlation between the electron plasma density and the magnetic field strength. The study of the …

Giotto extended mission

Schwehm, Gerhard

The navigation of the ESA spacecraft Giotto to its encounter with comet P/Halley on 14 March 1986 required just 10% of the fuel available. Although the spacecraft was damaged by dust impacts during its close flyby at the nucleus of P/Halley it was retargeted to return close to Earth to maintain the option to extend the mission to encounter another…

Far ultraviolet spectrophotometry of BD +28 4211

Green, James C.; Cook, Timothy A.; Cash, Webster

We report the results of a November 1989 rocket flight which recorded a flux calibrated spectrum of BD +28 4211 from 912 to 1150Å with 1Å resolution. BD +28 4211, an SdO type star, is commonly used as an ultraviolet calibration source in the IUE wavelength band. Our work extends the useful range of this standard shortward of Lyman α. Since previou…