Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-12-01T02:27:11.373Z Has data issue: false hasContentIssue false
  • English
  • Français

Results From Five Years Of Monitoring Of The Einstein Cross With NOT

Published online by Cambridge University Press:  25 May 2016

R. Østensen ,
S. Refsdal ,
R. Stabell  and
J. Teuber
R. Østensen
Affiliation:
Auroral Observatory, University of Tromsø, N-9037 Tromsø, Norway
S. Refsdal
Affiliation:
Hamburg Sternwarte Gojenbergsweg 112, D-21029 Hamburg, Germany
R. Stabell
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, Blindern, N-0315 Oslo, Norway
J. Teuber
Affiliation:
Copenhagen University Observatory, Brorfelde, DK-4340 Tølløse, Denmark

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.

After some preliminary observations in 1990, a program was started in 1991 at the Nordic Optical Telescope (NOT) on the island of La Palma for monitoring mainly four well known gravitational lens systems: QSO0142-100, QSO0957+561, QS01413+117 and QSO2237+0305 (The Einstein Cross). Here we report results from the monitoring of the Einstein Cross. During the four year period the Monitor Program was active (1990-1993) we gathered 55 high quality observations of this well known lens system. In addition we have collected 32 more observations in 1994 and a further four so far in 1995, a total of 91 new observations of the Einstein Cross.

Here we report results from the monitoring of the Einstein Cross. During the four year period the Monitor Program was active (1990–1993) we gathered 55 high quality observations of this well known lens system. In addition we have collected 32 more observations in 1994 and a further four so far in 1995, a total of 91 new observations of the Einstein Cross.

Type
Chapter 8: Quasar Structure & Microlensing
Information
Symposium - International Astronomical Union , Volume 173: Astrophysical Applications of Gravitational Lensing , 1996 , pp. 259 - 260
Copyright
Copyright © Kluwer 1996 

References

Corrigan, R.T., Irwin, M.J., Arnaud, J., et al., 1991, AJ, 102, 34 CrossRefGoogle Scholar
Østensen, R., 1994, Cand. Scient. , Google Scholar
Østensen, R., Refsdal, S., Stabell, R., Teuber, J., et al., 1995, A&A, in press Google Scholar