Science Archives Publication System

Observations of galactic cosmic ray modulation during Earth-directed coronal mass ejections

DOI: 10.1029/98GL50337 Bibcode: 1998GeoRL..25.2951M

Valtonen, E.; Riihonen, E.; Teittinen, M. +3 more

We describe three cosmic-ray decreases observed by the energetic particle telescope ERNE on board SOHO spacecraft during the period January-May, 1997. The decreases in cosmic-ray proton intensities in the energy range above 50 MeV were observed after the passage of interplanetary shocks on February 9, April 10, and May 15. All the shocks were prod…

1998 • Geophysical Research Letters

SOHO 2

The Use of Numerical Simulation in the Design of the Cluster/PEACE "Top Hat" Analyzer Electron Optics

DOI: 10.1029/GM102p0263 Bibcode: 1998GMS...102..263W

Johnstone, A. D.; Woodliffe, R. D.

The four-spacecraft Cluster mission was to be the first to attempt to measure space plasma gradients in three dimensions. The required accuracy of these gradient measurements poses a unique challenge to the accuracy with which the individual measurements must be carried out. In designing the electron analyzers of the PEACE(Plasma Electron And Curr…

1998 • Geophysical Monograph Series

Cluster 2

Crystalline Dust Features: A Simple Model

DOI: 10.1023/A:1001557809085 Bibcode: 1998Ap&SS.255..435B

Waters, L. B. F. M.; Bouwman, Jeroen

1998 • Astrophysics and Space Science

ISO 2

Infrared, submillimeter, and millimeter observations of the soft gamma-ray repeaters

DOI: 10.1016/S0273-1177(98)00209-9 Bibcode: 1998AdSpR..22.1133S

Waters, L. B. F. M.; Hurley, K.; Kouveliotou, C. +9 more

The Soft Gamma-Ray Repeaters appear to be a completely new manifestation of neutron stars. SGR 1806-20 and SGR 1900+14 may have highly unusual stellar counterparts, whose spectra peak in the far infrared. They have not been detected at submillimeter or millimeter wavelengths. Their infrared spectra appear to contain several components: the photosp…

1998 • Advances in Space Research

Ulysses 2

The Red Supergiant IRAS04553-6825 in the LMC

DOI: 10.1023/A:1001576916838 Bibcode: 1998Ap&SS.255..405V

van Loon, Jacco Th.

1998 • Astrophysics and Space Science

ISO 2

UV spectrophotometry and UBVJHKL photometry of the symbiotic nova V443 Her

Bibcode: 1998AstL...24...34K

Munari, U.; Kolotilov, E. A.; Popova, A. A. +1 more

The photometric UBVJHKL observations of the symbiotic star V443 Her performed during 1994-1997 and its UV spectrum obtained from IUE in October 1991 are presented. Over the last decade of dense photometric observations, the U light curve can be described by a sinusoid with P = 598 days. At the same time, no periodic variations (with P or P/2) have…

1998 • Astronomy Letters

IUE 2

What causes the variations of the peak intensity of CIR accelerated energetic ion fluxes?

DOI: 10.1007/s00585-998-1552-1 Bibcode: 1998AnGeo..16.1552K

Keppler, E.

The variation of the peak intensity of energetic ions accelerated at CIR related shocks in the interplanetary medium as observed by instruments on board of ULYSSES during its pass towards the south polar region and from the north polar region back to its aphelium is discussed. From ULYSSES measurements alone it cannot be decided whether the observ…

1998 • Annales Geophysicae

Ulysses 2

Time Series Resampling Methods

Bibcode: 1998ISSIR...1...43H

Schwartz, Steven J.; Harvey, Christopher C.

1998 • ISSI Scientific Reports Series

Cluster 2

ISO Observations of Classical Novae

DOI: 10.1023/A:1001150716412 Bibcode: 1998Ap&SS.255..227S

Kessler, M. F.; Clavel, J.; Metcalfe, L. +8 more

We describe the ISO programme to observe classical novae. The programme includes observations of novae during and shortly after eruption, and old novae. ISO observations of far infrared fine structure lines are providing us with information about physical conditions in nova ejecta which complement and extend knowledge obtained from ground-based ob…

1998 • Astrophysics and Space Science

ISO 2

ISO far-IR spectroscopy of the black hole candidate GRS 1915 + 105

Bibcode: 1998A&A...337..729W

Winkler, Christoph; Trams, Norman

referee We have observed the black hole candidate and Galactic superluminal source GRS 1915+105 with ISO LWS and SWS in March 1996 and March 1997 when the source was at fairly low X-ray and radio flux levels. If the source is associated with a dense molecular cloud, then corresponding far-IR continuum and line fluxes should be easily detectable an…

1998 • Astronomy and Astrophysics

ISO 2