Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-23T20:51:48.617Z Has data issue: false hasContentIssue false
  • English
  • Français

Photometric Monitoring Of The Lensed QSO 0957+561

Published online by Cambridge University Press:  25 May 2016

D. Sinachopoulos ,
M. Burger ,
E. van Dessel ,
M. Geffert ,
M. Thibor ,
J. Colin  and
Ch. Ducourant
D. Sinachopoulos
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B - 1180 Brussels, Belgium
M. Burger
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B - 1180 Brussels, Belgium
E. van Dessel
Affiliation:
Royal Observatory of Belgium, Ringlaan 3, B - 1180 Brussels, Belgium
M. Geffert
Affiliation:
Sternwarte der Univ. Bonn, Auf dem Hügel 71, D - 53121 Bonn, Germany
M. Thibor
Affiliation:
Sternwarte der Univ. Bonn, Auf dem Hügel 71, D - 53121 Bonn, Germany
J. Colin
Affiliation:
Observatoire de Bordeaux, BP 89 - 33270 Floirac, France
Ch. Ducourant
Affiliation:
Observatoire de Bordeaux, BP 89 - 33270 Floirac, France

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present our first results of a photometric monitoring project of the twin quasar 0957+561. This project aims mainly at the improvement of the determination of the time delay ΔT(A,B) for this gravitational lens, since the “time delay controversy on QSO 0957+561 (is) not yet decided” (Pelt et al. 1994). In addition, the quite large field of the CCD used allows also a long-term astrometric and photometric study of stars and galaxies in the field within a radius of about 10 arcminutes around the lens.

Type
Chapter 2: The Hubble Constant & Time Delays
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 53 - 54
Copyright
Copyright © Kluwer 1996 

References

Pelt, J., Hoff, W., Kayser, R., Refsdal, S., & Schramm, T., 1994, A&A, 286, 775 Google Scholar
Schild, R.E. & Weekes, T., 1984, ApJ, 277, 481 Google Scholar
Schild, R.E. & Cholfin, B., 1986, ApJ, 300, 209 CrossRefGoogle Scholar
Vanderriest, C., et al., 1989, A&A, 215, 1 Google Scholar