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Prospects For The Detection Of Microlensing Time Delays

Published online by Cambridge University Press:  25 May 2016

Christopher B. Moore  and
Jacqueline N. Hewitt
Christopher B. Moore
Affiliation:
Massachusetts Institute of Technology Cambridge, MA, USA
Jacqueline N. Hewitt
Affiliation:
Massachusetts Institute of Technology Cambridge, MA, USA

Abstract

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Since the image separations produced by microlensing are inaccessible to observation, we are left to observe either a change in total amplitude or the time delay between the images. Spillar (1993) has suggested that a time delay might be observed in the autocorrelation of a microlensed signal. The time delays are of order a few microseconds and are easily accessible to a sufficiently wide bandwidth system. We calculate expected observational results using the Green Bank Telescope with a VLBA recording system, and find that brightness temperatures exceeding the Compton limit are required for detection.

Type
Chapter 8: Quasar Structure & Microlensing
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 279 - 280
Copyright
Copyright © Kluwer 1996 

References

Quirrenbach, A., Witzel, A., Krichbaum, T., Hummel, C., Wegner, R., Schalinski, C., Ott, M., Alberdi, A., & Rioja, M., 1992, A&A, 258, 279 Google Scholar
Spillar, E., 1993, ApJ, 403, 20 Google Scholar