Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281b.257a&link_type=abstract
In ESA, Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2 p 257-260 (SEE N89
Astronomy and Astrophysics
Astronomy
5
Gravitational Lenses, Iue, Quasars, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Hubble Constant, Periodic Variations, Spatial Resolution, Stellar Spectra, Time Lag
Scientific paper
A study of 18 IUE spectra of the gravitationally lensed quasar, 0957+561A,B was used to search for time delays between light variation in the 2 components. Evidence for substantial, rapid variability in Component A in 1980, followed by a light variation in the other component 20 months later is found. However, it is argued that these variations do not record the same event in the quasar, and so, cannot be used to derive a value for the Hubble constant. The cause of the rapid variation in Component A in 1980 is not understood, but it does not appear to be a microlensing event.
Altner Bruce
Heap Sara R.
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