Separating Intrinsic and Microlensing Variability using Parallax Measurements

  • Stein Vidar Hagfors Haugan
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 173)

Abstract

In gravitational lens systems with 3 or more resolved images of a quasar, the intrinsic variability may be unambiguously separated from the microlensing variability through parallax measurements from 3 observers when there is no relative motion of the lens masses (Refsdal 1993). In systems with fewer than 3 resolved images, however, this separation is not straightforward. For the purpose of illustration, I make the following simplifications for the one-dimensional case: The observations consist of well-sampled time series of the observed flux F A (t i ) and F B (t i ) at two points in the observer plane. The separation vector of the two points is parallel to the direction of the transverse motion of the source-lens-observer system, and the distance D AB between the observers is known. Furthermore, the distance D AB small compared to the typical length scale of fluctuations in the magnification μ(x).

Keywords

Characteristic Scale Transverse Motion Intrinsic Variability Gravitational Lens Astrophysical Application 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Refsdal, S. 1993, in Gravitational Lenses in the Universe, eds. Surdej et al., Université de Liège, BelgiumGoogle Scholar

Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • Stein Vidar Hagfors Haugan
    • 1
  1. 1.Institute of Theoretical AstrophysicsUniversity of OsloOsloNorway

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