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Gravitational Lensing pp 102–107Cite as

The time delay of Q0957-+-561 A,B from 10 years of optical monitoring

  • II. Observations
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Part of the book series: Lecture Notes in Physics ((LNP,volume 360))

Abstract

Brightness monitoring of Q0957+561 A,B since its discovery in 1979 permits a time delay of 1.1 years to be established with 99 percent confidence. A best value for the time delay is now 404 days. Comparison of the brightness records shifted for the time delay shows an important discrepancy which we attribute to microlensing by a star or stars in the lens galaxy.

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Authors and Affiliations

  1. Center for Astrophysics Cambridge, 02138, MA, USA

    R. Schild

Authors
  1. R. Schild
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Editor information

Yannick Mellier Bernard Fort Geneviève Soucail

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© 1990 Springer-Verlag

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Schild, R. (1990). The time delay of Q0957-+-561 A,B from 10 years of optical monitoring. In: Mellier, Y., Fort, B., Soucail, G. (eds) Gravitational Lensing. Lecture Notes in Physics, vol 360. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0009241

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  • DOI: https://doi.org/10.1007/BFb0009241

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-52648-3

  • Online ISBN: 978-3-540-47087-8

  • eBook Packages: Springer Book Archive

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