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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

Comparison of the Two Major Solar Proton Events at ULYSSES During March 1991 and May-June 1991

Armstrong, T. P.; Venkatesan, D.; Ananth, A. G. +2 more

Periodicities in the IUE Particle Radiation Data

Arquilla, Richard

The magnetospheric charged particle flux measured serendipitously by the IUE satellite during perigee passages from February 1978 to February 1989 has been searched for periodicities using Fourier transform and correlation techniques. The analysis uncovers persistent modulations of the particle flux with periods of 28 to 33 days and 15 to 17 days.…

Precise Source Locations of Recent Gamma Ray Bursts

Hurley, K. C.; Fishman, G. J.; Kouveliotou, C. +9 more

How robust are the EGRET AGN gamma-ray identifications?

Bignami, G. F.; Caraveo, P.; Ciliegi, P.

Several AGNs have been proposed as identifications of gamma-ray sources discovered by CGRO. Using the NED database, the authors show that these AGNs are not the only extragalactic objects within the error boxes of the sources. Therefore, an in-depth study is needed on a case-by-case basis to access the most probable counterparts of the gamma-ray s…

Dependence of Ulysses Low-Energy Proton Flux on Solar Activity

Anglin, J. D.; Burrows, J. R.; Venkatesan, D. +1 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).

HST imaging of the wind-blown lobe NGC 6165.

Hester, J.; Scowen, P.; Code, A. +1 more

WFC observations of the lobe NGC 6165 have resolved clumps that are being photoevaporated by the intense UV radiation from HD 148937, in addition to the erosive effects of the strong stellar wind. The central object is a massive superluminous young star that is thought to be undergoing mass loss as it descends onto the main sequence. Analysis of s…

Ulysses over the pole of the Sun.

Young, S.