Science Archives Publication System

The optical counterparts of γ-ray bursts

DOI: 10.1038/24317 Bibcode: 1998Natur.396..233M

Harrison, Thomas E.; McNamara, Bernard J.

The origin of γ-ray bursts-which are among the most energetic events in the Universe-has puzzled astronomers for 25 years. Since 1991, new events have been discovered at a rate of about one per day, but because their positions were poorly determined, the objects responsible for these outbursts could not be identified. Now, following the launch of …

1998 • Nature

eHST 6

Spatial Interpolation for Four Spacecraft: Application to Magnetic Gradients

Bibcode: 1998ISSIR...1..371C

Harvey, Christopher C.; Chanteur, Gérard

1998 • ISSI Scientific Reports Series

Cluster 6

Multi-Spacecraft Analysis of Plasma Kinetics

Bibcode: 1998ISSIR...1..159S

Schwartz, Steven J.; Daly, Patrick W.; Fazakerley, Andrew N.

1998 • ISSI Scientific Reports Series

Cluster 6

HST Observation of GD 358

DOI: 10.1515/astro-1998-0204 Bibcode: 1998BaltA...7..203N

Kepler, S. O.; Winget, D. E.; Koester, D. +5 more

The success of asteroseismology lies in the correct identification of the star's normal modes of oscillation. Winget et al. (1994) identified the normal modes of a helium white dwarf pulsator, GD 358, through the frequency distribution of the pulsation. Robinson et al. (1995) described a new mode identification method by comparing the pulsation am…

1998 • Baltic Astronomy

eHST 6

The nature of visual components in 82 multiple systems

Bibcode: 1998AstL...24..257S

Shatskii, N. I.

We performed photoelectric BVR observations of 198 visual components in 82 multiple systems. We used a special technique for the measurements with a classical photometer. In our study of close visual binaries, we employed a new instrument - an astrometric scanning photometer; its design is described. Based on our photometric data in combination wi…

1998 • Astronomy Letters

Hipparcos 6

ISOPHOT Mapping Observations of a Mira-Type AGB Star R Hya

DOI: 10.1023/A:1001552227316 Bibcode: 1998Ap&SS.255..349H

Izumiura, H.; Hashimoto, O.

Far-infrared mapping observations of a Mira-type AGB star R Hya were carried out with the imaging photo-polarimeter ISOPHOT.

1998 • Astrophysics and Space Science

ISO 6

Dust Formation and Mass Loss in Evolved Stars

DOI: 10.1023/A:1001163102300 Bibcode: 1998Ap&SS.255..257W

Winters, Jan Martin

The problem of dust formation in the circumstellar envelopes of Asymptotic Giant Branch stars is addressed. We summarize the basic thermodynamic prerequisites necessary to enable the formation and growth of solid particles from the gas phase and draw some conclusions on the evolution of the emergent dust component. In a circumstellar environment t…

1998 • Astrophysics and Space Science

ISO 5

HST observations of middle aged isolated neutron stars

DOI: 10.1016/S0273-1177(97)00804-1 Bibcode: 1998AdSpR..21..197M

Caraveo, P. A.; Bignami, G. F.; Mignani, R.

We report the results of recent HST observations of three Middle Aged Isolated Neutron Stars i.e. PSR1055-52, Geminga and PSR0656+14. For PSR1055-52, a probable optical counterpart has been identified with the FOC. For PSR0656+14, WFPC2 imaging provided a clear detection of the proposed optical counterpart and was used to obtain a tentative measur…

1998 • Advances in Space Research

eHST 5

Model Atmospheres of AGB Stars: Dynamics, Molecules and Dust

DOI: 10.1023/A:1001655504117 Bibcode: 1998Ap&SS.255..281H

Loidl, Rita; Höfner, Susanne; Jφrgensen, Uffe G.

The atmospheres and circumstellar envelopes of AGB stars are characterized by complex physical phenomena like shock waves caused by stellar pulsation or formation of molecules and dust which often lead to a heavy mass loss and have a strong influence on IR properties as observed by ISO. To allow a physical interpretation of various observations we…

1998 • Astrophysics and Space Science

ISO 5

Solar Radiometry with the Telescope and Vaccum-Ultraviolet Spectrometer Sumer on the Solar and Heliospheric Observatory (SOHO)

DOI: 10.1088/0026-1394/35/4/76 Bibcode: 1998Metro..35..671H

Curdt, W.; Dammasch, I. E.; Hollandt, J. +3 more

1998 • Metrologia

SOHO 5