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Radio waves in the heliosphere

Bougeret, J. -L.

Solar radio emissions at long wavelengths (wavelengths greater than 10 m or frequencies smaller than 30 MHz) are produced in the upper corona and in the interplanetary medium (the Heliosphere), sometimes at very large distances from the Sun, up to the orbit of Jupiter and beyond. Solar radio emissions are produced by the passage of energetic parti…

Ulysses observations of a pure electron event and its associated type III radio emission on December 15, 1990

Chaizy, P.; Pick, M.; Forsyth, R. +5 more

We describe an electron event associated with a type III burst observed by Ulysses. This event was observed when the spacecraft crossed the region of strong compression between a fast and a slow solar wind stream, characterized by a relatively high density and a complex behaviour of the plasma density, magnetic field and energetic electron anisotr…

Einstein and EXOSAT observations of Geminga revisited

Bignami, G. F.; Mereghetti, S.; Caraveo, P.

We have re-analyzed the archive Einstein IPC and EXOSAT CMA x-ray data of Geminga, in the light of the recent discoveries on this source. The results of a search for the 237 msec periodicity are consistent with a pulsed fraction decreasing with x-ray energy. We have combined the EXOSAT CMA and the Einstein data in order to limit the spectral param…

The Decay Phase of the March-April, 1991 Low-Energy Particle Events Observed at Ulysses and Earth

Simnett, G. M.; Lanzerotti, L. J.; Armstrong, T. P. +2 more

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).