Science Archives Publication System

Cos-B X-Ray Observations of CYGNUS-X-3 - an Indications for Apsidal Motion

DOI: 10.1007/BF01246058 Bibcode: 1981SSRv...30..419V

van der Klis, M.; Bonnet-Bidaud, J. M.

Results are presented of three ∼40 d COS-B X-ray observations of Cyg X-3. The shape of the 4.8 h light curve showed variations on all observational time scales. An ∼20 d periodicity was found in the arrival time of the minimum of the light curve, interpreted as apsidal motion of an orbit with an eccentricity of ∼0.03.

1981 • Space Science Reviews

COS-B 2

Evidence in the COS-B data for time-variable gamma-ray sources in the galactic plane

Bibcode: 1981ICRC....9...64B

Caraveo, P. A.; Strong, A. W.; Hermsen, W. +7 more

1981 • International Cosmic Ray Conference

COS-B 2

Gamma Rays from Specific Molecular Clouds

Bibcode: 1981ICRC....1..150I

Wolfendale, A. W.; Li, Ti-Pei; Issa, M. R. +1 more

The characteristics of specific local molecular clouds which may be visible in gamma-rays are examined. Data from the SAS II and COS B satellites are used to derive observed gamma-ray fluxes and flux limits. Conversions are made to a standard energy threshold of 100 MeV, and averages are taken. Results show that on the average, not much enhancemen…

1981 • International Cosmic Ray Conference

COS-B 2

COS-B gamma-ray measurements, cosmic rays and the local interstellar medium

Bibcode: 1981ICRC....1..146S

Caraveo, P. A.; Bignami, G. F.; Strong, A. W. +6 more

The results of COS-B gamma ray, cosmic ray, and the local interstellar medium measurements are summarized, with particular regard for H I emissions at galactic longitude 240 deg. Significant quantities of atomic hydrogen are calculated from the local gamma ray emissivity, and the gamma ray emissivity spectrum is deconvolved from equations of the e…

1981 • International Cosmic Ray Conference

COS-B 2

New large-scale properties of the galactic gamma radiation observed by COS-B in the context of the diffuse emission within the galactic disc

Bibcode: 1981ICRC....1..206M

Caraveo, P. A.; Bignami, G. F.; Hermsen, W. +7 more

1981 • International Cosmic Ray Conference

COS-B 1

IUE Spectroscopy of Dwarf M Stars

Bibcode: 1981IrAJ...15..113B

Byrne, P. B.

1981 • Irish Astronomical Journal

IUE 1

Far-UV wind line profile changes in the O-type star HD 175754.

Bibcode: 1981A&A...100..183C

Stalio, R.; Carrasco, L.; Costero, R.

Resonance line profile changes in far-UV spectra of HD 175754, obtained with the IUE satellite are reported. These changes are interpreted in terms of variations in the dynamics and density-ionization structure of the star's wind.

1981 • Astronomy and Astrophysics

IUE 1

Ultraviolet observations of Jupiter from Earth-orbiting satellites

DOI: 10.1016/0273-1177(81)90233-7 Bibcode: 1981AdSpR...1i.185M

Moore, V.

The International Ultraviolet Explorer (IUE) has provided both improved spectral resolution and some spatial resolution for UV observations of Jupiter. Previous satellite observations have produced albedo curves for Jupiter showing the influence of Rayleigh scattering, and of some absorber(s) shortward of 2500Å on the UV spectrum. Constraints on t…

1981 • Advances in Space Research

IUE 0

A differential measurement of the Lyman alpha emission from the giant planets using IUE

DOI: 10.1016/0273-1177(81)90230-1 Bibcode: 1981AdSpR...1i.165F

Encrenaz, T.; Combes, M.; Fricke, K. H. +1 more

The intensity of the resonantly scattered Ly-α line of the gian planets depends on the scattering column length of atomic hydrogen above the methane layer and on the incident solar flux. We have obtained measurements of the Ly-α brightness of Jupiter and Saturn on December 19, 1979, with a time difference of 111 minutes, which is only slightly lon…

1981 • Advances in Space Research

IUE 0

Erratum - IUE Observation of Strong Ultraviolet Absorption in the Spectrum of the c2 White Dwarf L145-141

Bibcode: 1981A&A....94..206W

Koester, D.; Vauclair, G.; Wiedemann, V.

1981 • Astronomy and Astrophysics

IUE 0