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ULYSSES observations of latitude gradients in the heliospheric magnetic field
Phillips, J.; Balogh, A.; Tsurutani, B. T. +3 more
Several parameters measured by Ulysses as it traveled southward to heliographic latitudes of -50 deg are presented and analyzed. The radial component of the magnetic field, averaged over 5 deg latitude increments and extrapolated back to 1 AU, is found to agree with baseline measurements provided by IMP-8. There is little, if any, evidence of a la…
High-Latitude Observations of Energetic Ions During the First ULYSSES Polar Pass
Balogh, A.; Forsyth, R. J.; Goldstein, B. E. +3 more
We present observations of energetic ions from the Ulysses COSPIN Low Energy Telescope in the mid and high-latitude regions of the heliosphere prior to and during the first polar pass of the Ulysses spacecraft. After the encounter with Jupiter, Ulysses started on its journey out-of-the-ecliptic. Between ∼13°S and ∼29°S the spacecraft sampled the s…
An Atlas of Alpha Orionis Obtained with the Goddard High Resolution Spectrograph on the Hubble Space Telescope
Savage, B. D.; Ebbets, D. C.; Carpenter, K. G. +18 more
An atlas of observations of the late-type supergiant a Orionis taken with the Goddard High Resolution Spectrograph in 1992 September is presented. We have included identifications of the major features along with the fully reduced spectrum. The 33 exposures consist of 3 high resolution (R∼80,000) and 30 medium resolution (R ∼20,000∼35,000) observa…
The Ultraviolet Reflectivity of Jupiter at 3.5 Angstrom Resolution from Astro-1 and Astro-2
Wolven, Brian C.; Feldman, Paul D.; McGrath, Melissa A. +2 more
The reflectivity of Jupiter in the wavelength band from 1450 to 1850 A at 3.5 A resolution has been determined from measurements of Jovian equatorial spectra obtained by the Hopkins Ultraviolet Telescope, which was flown on the Space Shuttle Columbia during the 1990 December Astro-1 mission and then on the Endeavour during the 1995 March Astro-2 m…
A Search for a Pulsar in the Remnant of SN 1987A with the Hubble Space Telescope High-Speed Photometer
Dolan, J. F.; Boyd, P. T.; Nelson, M. J. +8 more
The High Speed Photometer (HSP) on the Hubble Space Telescope (HST) observed the remnant of SN 1987A on four different epochs between 1992 June 2 and 1993 November 4 in a 1600-7000 Å bandpass. Each observation was ∼40 minutes in duration and used a 100 microseconds sampling time. Assuming a spectrum like PSR B0540 -69 with similar reddening, the o…
Tangential discontinuities at high heliographic latitudes (∼-80°)
Balogh, A.; Tsurutani, B. T.; Goldstein, B. E. +2 more
In this study, tangential discontinuities (TDs) near -80° heliographic latitude have been studied. Based on our quantitative definitions, we find that the TDs may generally be divided into two clear types. There is a distinct population of TDs small (<40°) directional changes. About 19% of all high-latitude TDs are in this category. These types…
ULYSSES solar wind plasma observations during the declining phase of solar cycle 22
McComas, D. J.; Goldstein, B. E.; Bame, S. J. +5 more
Since launch in October 1990, the Ulysses mission has included an in-ecliptic cruise enroute to Jupiter encounter in February 1992 and a post-Jupiter transit through a wide range of southerly latitudes and heliocentric distances. Here we present results from the solar wind plasma experiment through June 14, 1994, at which time Ulysses was at -68.2…
Solar Wind Charge States Measured by Ulysses/SWICS in the South Polar Hole
Galvin, A. B.; Cohen, C. M. S.; Ipavich, F. M. +2 more
The Ulysses mission now has an extensive data base covering several passes of the south polar coronal hole as the spacecraft proceeds to higher latitudes. Using composition measurements from the SWICS experiment on the Ulysses spacecraft, we have obtained charge state distributions, and hence inferred coronal ionization temperatures, for several s…
Optical identification of EUV sources: the secrets of EUVE J2056-17.1.
Doyle, J. G.; Mathioudakis, M.; Dupuis, J. +7 more
We present optical, ultraviolet (UV), and extreme ultraviolet (EUV) results for a new active late-type dwarf star discovered by the Extreme Ultraviolet Explorer (EUVE). A large flare with an energy in excess of 10^35^erg and duration of ~1.1 days was detected in the EUVE Lex/B band (60-200A). The energetics of the event indicate that radiative los…
ROSAT observations of the flare star CC ERI
Jordan, C.; Pan, H. C.
The flare/spotted spectroscopic binary star CC Eri was observed with the Position Sensitive Proportional Counter (PSPC) on the X-ray satellite ROSAT on 1990 July 9-11 and 1992 January 26-27. During the observations, the source was variable on time-scales from a few minutes to several hours, with the X-ray (0.2-2 keV) luminosity in the range ~(2.5-…