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HST High-Resolution Images and Maps of Pluto
Stern, S. A.; Trafton, L. M.; Buie, M. W.
We have obtained Hubble Space Telescope (HST) images of Pluto at 410 and 278 nm which resolve numerous distinct albedo provinces on this planet. Our images were obtained using the Faint Object Camera (FOC) of the Hubble Space Telescope between 1994 June 20 and July 01. This dataset is the first longitudinally-complete, rotationally-resolved direct…
The UV/X-ray emission of the symbiotic star AG Draconis during quiescence and the 1994/1995 outbursts.
Greiner, J.; Altamore, A.; Stencel, R. E. +4 more
We present the results of an extensive campaign of coordinated X-ray (ROSAT) and UV (IUE) observations of the symbiotic star AG Dra during a long period of quiescence followed recently by a remarkable phase of activity characterized by two optical outbursts. The major optical outburst in June 1994 and the secondary outburst in July 1995 were cover…
Hubble Space Telescope Snapshot Survey of 3CR Radio Source Counterparts. II. Radio Galaxies with Z > 0.5
Baum, Stefi A.; McCarthy, Patrick J.; Sparks, William B. +5 more
We present images of 51 3CR radio galaxies with 0.5 < z < 2.5 obtained in the snapshot mode with the Hubble Space Telescope. The images are short exposures with the Planetary Camera and the F702W filter. A wide range of morphologies and surface brightness are seen on subarcsecond scales. Some are very strongly nucleated, and their light is m…
Magnetopause structure and the role of reconnection at the outer planets
Russell, C. T.; Szabo, A.; Le, G. +1 more
In situ measurements have been obtained at the magnetopause boundary of all the giant outer planets. The Jovian magnetopause was probed by Pioneers 10 and 11, Voyagers 1 and 2, Ulysses, and most recently by Galileo. Saturn was visited by Pioneer 11 and Voyagers 1 and 2, and Uranus and Neptune were visited by Voyager 2. The observations at Jupiter …
Flows and Dynamics in the Corona Observed with the Coronal Diagnostic Spectrometer (cds)
Harrison, R. A.; Kjeldseth-Moe, O.; Haugan, S. V. H. +5 more
EUV spectra obtained with the Coronal Diagnostic Spectrometer (CDS) on the Solar and Heliospheric Observatory (SOHO) show significant flows of plasma in active region loops, both at coronal and transition region temperatures. Wavelength shifts in the coronal lines Mgix 368 Å and Mgx 624 Å corresponding to upflows in the plasma reaching velocities …
Hot protons in the inner corona and their effect on the flow properties of the solar wind
Habbal, Shadia R.; Hollweg, Joseph V.; Esser, Ruth +1 more
Following recent observations which indicate the presence of extremely high flow speeds in the inner corona, 700-800kms-1 below 10RS, and the possible presence of very high proton temperatures, 3×106<=Tp<=8.5×106K, we present a parameter study which shows that if the high proton temperat…
Observations of the Hubble Deep Field with the Infrared Space Observatory - I. Data reduction, maps and sky coverage
Elbaz, D.; Danese, L.; Franceschini, A. +16 more
We present deep imaging at 6.7 and 15 mu from the CAM instrument on the Infrared Space Observatory (ISO), centred on the Hubble Deep Field (HDF). These are the deepest integrations published to date at these wavelengths in any region of sky. We discuss the observational strategy and the data reduction. The observed source density appears to approa…
Observations of GRB 970228 and GRB 970508 and the Neutron Star Merger Model
Livio, Mario; Bond, Howard E.; Kouveliotou, Chryssa +6 more
We present the discovery observations for the optical counterpart of the gamma -ray burster GRB 970508 and discuss its light curve in the context of the fireball model. We analyze the HST data for this object and conclude that any underlying galaxy must be fainter than R=25.5 . We also present a detailed analysis of the HST images of GRB 970228, f…
Time-Resolved Ultraviolet Observations of the Globular Cluster X-Ray Source in NGC 6624: The Shortest Known Period Binary System
Anderson, Scott F.; Margon, Bruce; Deutsch, Eric W. +2 more
Using the Faint Object Spectrograph (FOS) aboard the Hubble Space Telescope (HST), we have obtained the first time-resolved spectra of the King et al. (1993) ultraviolet-bright counterpart to the 11 minute binary X-ray source in the core of the globular cluster NGC 6624. This object cannot be readily observed in the visible, even from HST, because…
Radiometric calibration of SUMER: refinement of the laboratory results under operational conditions on SOHO
Wilhelm, Klaus; Schühle, Udo; Curdt, Werner +3 more