CCD Photometry of QSO 0957+561 A & B for the period 1987-1992 using La Palma archive

We present the results of CCD photometry of the first gravitational lenssystem QSO 0957+561, obtained on the base of La Palma archive. Usingcross-correlation analysis we have found the time delay between A and Bquasar images to be 430 ± 15 days. Our photometry of QSO 0957+561 A & Bgives addition...

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Bibliographic Details
Published in:Astrophysics and space science 2001-03, Vol.275 (4), p.385-389
Main Authors: Slavcheva-mihova, Ls, Oknyanskij, Vl, Mihov, Bm
Format: Article
Language:English
Subjects:
Astrophysics
Correlation analysis
Gravity
Photometry
Quasars
Online Access:Get full text
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Summary:We present the results of CCD photometry of the first gravitational lenssystem QSO 0957+561, obtained on the base of La Palma archive. Usingcross-correlation analysis we have found the time delay between A and Bquasar images to be 430 ± 15 days. Our photometry of QSO 0957+561 A & Bgives additional independent confirmation of the recent results on the time delay about 425 days.[PUBLICATION ABSTRACT]
ISSN:0004-640X
1572-946X
DOI:10.1023/A:1002720617355