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The VLA Light Curves of 0957+561, 1979-1994

Published online by Cambridge University Press:  25 May 2016

D. B. Haarsma ,
J. N. Hewitt ,
B. F. Burke  and
J. Lehár
D. B. Haarsma
Affiliation:
Massachusetts Institute of Technology
J. N. Hewitt
Affiliation:
Massachusetts Institute of Technology
B. F. Burke
Affiliation:
Massachusetts Institute of Technology
J. Lehár
Affiliation:
Harvard-Smithsonian Center for Astrophysics

Abstract

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The gravitational lens 0957+561 has been monitored by our group for 16 years, using the VLA at 5 GHz. Since our last report in 1992, both images have returned to their quiescent flux levels, and the A image has brightened again. We apply various analysis methods to the light curves, and obtain a preliminary estimate of τ = 455 ± 40 days for the time delay.

Type
Chapter 2: The Hubble Constant & Time Delays
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 43 - 44
Copyright
Copyright © Kluwer 1996 

References

Lehár, J., Hewitt, J.N, Roberts, D.H., & Burke, B.F., 1992, ApJ, 384, 453 CrossRefGoogle Scholar
Pelt, J., Hoff, W., Kayser, R., Refsdal, S., & Schramm, T., 1994, A&A, 286, 775 Google Scholar
Press, W.H., Rybicki, G.B., Hewitt, J.N., 1992a, ApJ, 384, 404 CrossRefGoogle Scholar
Press, W.H., Rybicki, G.B., Hewitt, J.N., 1992b, ApJ, 384, 416 CrossRefGoogle Scholar
Walsh, D., Carswell, R.F., & Weymann, R.J. 1979, Nature, 279, 381 Google Scholar