Science Archives Publication System

X-ray VS He ii λ1640 Å correlation of II Peg

DOI: 10.1007/BF00645070 Bibcode: 1992Ap&SS.197...35E

Esendemir, A.; Alev, H. M.

The HeII λ1640 Å emission feature on the IUE spectra of II Peg has been compared with the observed X-ray flux. The atmospheric activity level is determined by comparing the several diagnostic line intensities with the solar case.

1992 • Astrophysics and Space Science

IUE 0

On the final trajectory to the solar poles

Bibcode: 1992DorPo...1....5H

Hampel, Guenther

The Ulysses spacecraft's encounter with Jupiter is described to illustrate the swing-by maneuver from the Jovian ecliptic plane to a trajectory over the solar poles. Details are provided of the Jupiter fly-by and the theoretical principles of the swing-by maneuver including the optimization of the 70-deg dwell time and three trajectory-correction …

1992 • Dornier Post

Ulysses 0

Deep-Space Navigation Applications of Improved Ground-Based Optical Astrometry

Bibcode: 1992TDAPR.110..118N

Null, G. W.; Owen, W. M., Jr.; Synnott, S. P.

Improvements in ground-based optical astrometry will eventually be required for navigation of interplanetary spacecraft when these spacecraft communicate at optical wavelengths. Although such spacecraft may be some years off, preliminary versions of the astrometric technology can also be used to obtain navigational improvements for the Galileo and…

1992 • Telecommunications and Data Acquisition Progress Report

Hipparcos 0

Ulysses makes its own way.

Bibcode: 1992AsNow...6...19O

O'Brien, R.

1992 • Astronomy Now

Ulysses 0

Aspects of data flow for an Edison-type observatory

DOI: 10.1007/BF00212486 Bibcode: 1992SSRv...61..241P

Penny, Alan

The design of the flow of data for an Edison-type space mission, involving a large diameter telescope for use in the near-infrared and having a mission lifetime of 10-20 yrs, is discussed. Relevant lessons on data flow that can be learned from the IUE, HST, ground-based observatories, IRAS, and SOHO are briefly considered. Future design developmen…

1992 • Space Science Reviews

IUE 0

Ultraviolet Spectrophotometry of VV Cephei

Bibcode: 1992JASS....9..111K

Kang, Young Woon

The IUE archival spectra of VV Cephei were collected to investigate the eclipse nature in the ultraviolet. The temperature of the B star has been determined, as approximately 30000K, based on the flux distributions during egress. Light curves of VV Cephei were reduced from the spectrophotometry of the IUE archival spectra. Three light curves at th…

1992 • Journal of Astronomy and Space Sciences

IUE 0

Attractive small satellite supports Ulysses measurements - URM concept for 'stereo studies' of the heliosphere

Bibcode: 1992Asnau..29...13P

Kunow, Horst; Pailer, Norbert; Hampel, Guenter

A relatively inexpensive solution is proposed as an alternative to the withdrawn American contribution to the International Solar Polar Mission. Two alternative configurations for this Ulysses Reference Mission (URM) are briefly described.

1992 • Astronautik

Ulysses 0

Ultraviolet observations of stellar coronae : early results from HST.

Bibcode: 1992MmSAI..63..577L

Linsky, Jeffrey L.

The first GHRS spectra of two very different late-type giant stars - Capella and Gamma Dra are reported. Capella is a 104 day period binary system consisting of two stars (G9 III and GO III) each of which shows bright emission lines formed in solar-like transition region and coronae. By contrast, Gamma Dra is a hybrid-chromosphere star with very w…

1992 • Memorie della Societa Astronomica Italiana

eHST 0

M ¥± Line Variation of 32 Cygni

Bibcode: 1992JASS....9..154K

Kang, Young Woon

The Mg ¥± lines have been extracted from the IUE archival spectra of 32 Cygni to investigate the effect of the atmospheric eclipse. The UV light curve has been reduced from the continuum flux at the center wavelength of 2807.5 Å in the IUE spectra. The equivalent width of the Mg ¥± k absoption line has been measured for each spectra. The results o…

1992 • Journal of Astronomy and Space Sciences

IUE 0

Emission Line Variability in AGN's.

DOI: 10.1007/978-3-642-77543-7_16 Bibcode: 1992RvMA....5..229K

Kollatschny, W.

1992 • Reviews in Modern Astronomy

IUE 0