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The ULYSSES energetic particle composition experiment EPAC
Woch, J.; Keppler, E.; Korth, A. +4 more
The purpose of this paper is to briefly describe the EPAC investigation aboard the Ulysses spacecraft. The EPAC sensor will measure the fluxes, angular distributions, energy spectra, and composition of ions in the energy range from 300 keV/nucleon to 25 MeV/nucleon. Some measurements will be shown obtained after turn-on in interplanetary space.
Dynamic phenomena on the RS Canum Venaticorum binary II Pegasi in August 1989. I. Observational data.
Bromage, G. E.; Doyle, J. G.; Linsky, J. L. +22 more
Observational results are given for two flares in Pi Pegasi that were detected by the GINGA and IUE satellites, as well as by ground-based Johnson U-band photometry and optical spectroscopy. The best-fitting results were obtained for a combination of a single-temperature plasma together with a power law; for a two-temperature model, the temperatur…
Mesures de vitesses radiales. V. Accompagnement AU sol du programme d'observation du satellite Hipparcos.
Duflot, M.; Burnage, R.; Genty, V. +2 more
The paper presents data on 1070 radial velocity measurements of stars distributed in 39 fields measuring 4 deg x 4 deg. The PPO series of Fehrenbach et al. (1987) and Duflot et al. (1990) is continued using the Fehrenbach objective prism method.
X-ray observations of flat spectrum radio sources with the HEAO-A, Einstein and EXOSAT observatories.
Pietsch, W.; Schaaf, R.; Witzel, A. +3 more
This paper presents X-ray data collected with the satellites HEAO-A, EINSTEIN (HEAO-B) and EXOSAT for flat spectrum radio sources. Most of the sources are from a complete sample of the high-declination 5 GHz survey.
The gravitational wave experiment
Comoretto, G.; Giampieri, G.; Asmar, S. W. +6 more
Since the optimum size of a gravitational wave detector is the wave length, interplanetary dimensions are needed for the mHz band of interest. Doppler tracking of Ulysses will provide the most sensitive attempt to date at the detection of gravitational waves in the low frequency band. The driving noise source is the fluctuations in the refractive …
The coronal-sounding experiment
Bird, M. K.; Asmar, S. W.; Volland, H. +3 more
The main science objective of the Ulysses Solar Corona Experiment is to derive the plasma parameters of the solar atmosphere using established coronal-sounding techniques. Applying appropriate model assumptions, the 3D electron density distribution will be determined from dual-frequency ranging and Doppler measurements recorded at the NASA Deep Sp…
Spectroscopic study of the atmospheric eclipsing binary VV Cephei.
Hack, M.; Boehm, C.; Engin, S. +3 more
We present the results of the study of 49 high dispersion spectrograms obtained at the Haute-Provence Observatory from July 1967 to January 1981, including the epoch of the eclipse of 1977. The radial velocity, intensity and profile variations of several absorption and emission lines are given. The ratio between the fluxes of the M2 giant and the …
Mesures de vitesses radiales. VI. Accompagnement AU sol du programme d'observation du satellite Hipparcos.
Burnage, R.; Fehrenbach, Ch.; Figuiere, J.
A list of radial velocities of 2601 stars obtained with the Fehrenbach objective prism associated with the Schmidt telescope of the Haute Provence Observatory is presented. These stars belong to specially chosen fields containing several Hipparcos input catalog star members. A total of 440 probable radial-velocity variable was observed. Sixty-nine…
The spectrum of the VV Cephei star KQ Puppis (Boss 1985). II. Atlas of the optical and ultraviolet spectrum.
Altamore, A.; Rossi, C.; Baratta, G. B. +1 more
An Atlas is presented of the high-resolution spectrum of the VV Cep M1-2Iab + Be variable KQ Pup (Boss 1985). The Atlas is based on UV observations obtained in 1979 with the IUE (covering the region from 1223 A to 3228 A) and on coude plates covering the blue to the optical UV. The equivalent widths and radial velocities of the main features prese…
Ephemerides of the 48 HIPPARCOS minor planets for the year 1992
Bec-Borsenberger, A.
To be observed by Hipparcos, the position of each object has to be known with an accuracy of 1 arcsecond and its magnitude with an accuracy of 0.5 mag. Therefore, the orbital elements of the 48 selected minor planets of the Hipparcos mission, have been improved in order to extrapolate their ephemerides with the accuracy required. Updated ephemerid…