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Multi-wave Monitoring of the Gravitational Lensed Quasar Q0957+561

Published online by Cambridge University Press:  20 April 2012

Vyacheslav N. Shalyapin ,
Luis J. Goicoechea  and
Rodrigo Gil-Merino
Vyacheslav N. Shalyapin
Affiliation:
Universidad de Cantabria, 39005 Santander, Spain email: [email protected] Institute for Radiophysics and Electronics, 61085 Kharkov, Ukraine
Luis J. Goicoechea
Affiliation:
Universidad de Cantabria, 39005 Santander, Spain email: [email protected]
Rodrigo Gil-Merino
Affiliation:
Universidad de Cantabria, 39005 Santander, Spain email: [email protected]
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Abstract

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We present X-ray (Chandra), ultraviolet (Swift/UVOT; U band) and optical-infrared (Liverpool Telescope; griz bands) continuum light curves of Q0957+561 observed in the first half of 2010. A cross-correlation analysis of the light curves shows that the U-band fluctuation leads the other variations at higher and lower energies. The study constrains the geometry of the continuum emission regions in a distant radio-loud AGN for the first time. We note that our work opens a new window in echo-mapping of high-z AGNs with the use of lensed quasars, since the variability of some of the images of a given multiply-imaged quasar can be predicted in advance, provided there is a modest optical follow-up of the system.

Keywords

Gravitational lensing: strongblack hole physicsquasars: individual (Q0957+561)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S285: New Horizons in Time-Domain Astronomy , September 2011 , pp. 406 - 407
Copyright
Copyright © International Astronomical Union 2012

References

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